Knowledge training camp (1) 1. (1) Open the p màI dome (2)① Melt into capacity ② Relax into gallop (3) Example: She covered the trees, and there appeared the magical scenery of "blowing open the petals of ten thousand pear trees" 2.c (incomplete ingredients, At the end of the sentence, add "urgent need" 3.b4.) 5 .( 1) renewable energy air conditioning system with ground source heat pump (2) rainwater collection and treatment system (3) solar photovoltaic power station (6.c7) (1) rivers growing in the sun (2) only shallow grass can have no horseshoe (3) It is the world. Turn into spring mud to protect flowers 8. (1) camel Xiangzi, Lao She (2) Xiangzi, tigress, Si Liu, Renhe 9. Example: Hello, Aunt. Xiaogang was scheduled to go to Butterfly Mountain Park with Xiaoming the day after tomorrow morning. Because he has something to leave, please tell Xiao Ming if he can go again at 3 pm the day after tomorrow. 10. Activity 1: Wuyue: Dongyue Taishan, Xiyue Huashan, Beiyue Hengshan, Zhongyue Songshan and Nanyue Hengshan; Three famous buildings in the south of the Yangtze River: Tengwang Pavilion in Jiangxi, Yellow Crane Tower in Hubei and Yueyang Tower in Hunan. Activity 2: For example: the first picture: here vines are winding and hundreds of plants are lush, which puts a lush green dress on the mountains. A mountain spring flows slowly between the two mountains, like a jade belt hanging in the green Ikenoe. Castle Peak, Green Lake and Bai Quan form a perfect picture. Activity 3: Although China citizens have the economic ability and demand for leisure travel, paid vacation is not guaranteed, and employees are afraid to travel in order to keep their jobs. Activity 4: For example: Guilin landscape: Guilin landscape is the best in the world, with jade and jade. You can participate in the Qin Terracotta Warriors and Horses-watch thousands of underground horses migrate to Qin Terracotta Warriors and Horses in An (1 1) (2) worry (3) the same as "treatment", more 12. (65438) (2) This person's method of enjoying the cool in the daytime is ingenious, but it is quite clumsy to enjoy the cool in the same way at night. 13. The moon stream moves and migrates to follow the yin. 14. Tell us to improvise and not stick to the rules. In the state of Zheng, there was a man enjoying the cool under an independent tree. The sun moves in the air, and the shadows of trees move on the ground. He also moved his sofa and curtains. In the evening, he put the sleeping mat under the big tree again. The moon moves in the air and the shadows of trees move on the ground. He moved his bed with the shadows of the trees, and he was wet with dew. The shadow of the tree moved farther and farther, and his body became wetter and wetter. It is clever to use during the day, but it is quite clumsy to use at night.

Knowledge training camp (2) 1.d (Chā n ɡ is cā n ɡ) 2. c (The word "appointment" in item A is "withered". "Rotten" in item B is "excessive". The word "cultivator" in item D is "evil") 3. A) unbearable: it's too cumbersome. Can be changed to "get something for nothing") 4.c (improper use of related words, "as long as" is changed to "only") 5.b6. (1) I said autumn is better than spring (2) I understood as soon as I climbed to the top of the mountain (3) Why are officials angry? (4) There is another fog coming from Yungu and Menggu, which has been besieging Yueyang City. (5) There is nothing to do. It can also be understood as praising people who are truly talented but modest and prudent; It can also be understood as criticizing an abnormal social phenomenon, and people who are uneducated are bossing around those who read widely (putting on airs). 8. Example: "Snow Dragon" crossed the equator and returned to the northern hemisphere. (1) ① Leopard Head ② Snow Mountain Temple, and Wang Lun fire, mistakenly broke into Baihutang, burned forage field, and went to Liangshan on a snowy night ③ Yang Zhi was extremely clever ⑤ Example: Yang Zhi sold knives and lost his birthday class (2) Captain Nemo 10. Please. When spring comes, the sun rises from the river, the flowers on the river are brighter than red, and the green river is greener than the blue grass. Xia: No one crossed the long fence, only dragonflies and butterflies were flying. The delicate lotus flower bud shows a sharp corner from the water, and a naughty little dragonfly stands on its head. Autumn: Autumn wind blows my heart, heading for Yumenguan forever and ever. In the autumn night, candlelight reflected the screen, and Fan slapped the fireflies with his hand. Winter: There are some plums in the corner. hanling opens them alone. The snow in Mei Xu Xun is three points white, but the snow has lost a kind of plum fragrance. Please state your name. Example: Miaoshan. Please guide your tour. For example, hello, tourists! Welcome to Dafeng Elk Nature Reserve. This is a national elk nature reserve, a wetland beach on the Yellow Sea, with a total area of 78,000 hectares. Here, the harbor diverges vertically and horizontally, the sea and the sky meet, Artemisia halophila is everywhere, and reeds cover the sky. It is the most intact semi-primitive wetland on the west coast of the Pacific Ocean. It is rich in species, freely inhabited by more than 400 animal families such as elk, red-crowned crane and roe deer, and has nearly 500 kinds of coastal plants. It is a natural seaside museum, where you can feel the natural beauty of the original ecology. I'm sure you'll be glad to have you here. Please discuss that light waves travel much faster in the atmosphere than sound waves, so we see lightning first and then hear thunder. 1 1. Ceng Zi is ill. Le Zhengzi Chun is sitting under the bed, Zeng Yuan and Zeng Shen are sitting at the feet, and the boy is sitting in the corner holding a candle. 12.( 1) Replace in the corner (2) 13. A gentleman loves from the height of moral principles, but a villain loves in a tolerant way. 14. Dialogue 15. It highlights Ceng Zi's simple habit and meticulous spirit of advocating ethics. Ceng Zi is lying in bed, dying. Zi Chun, a disciple of Ceng Zi, sat by the bed, Zeng Yuan and Zeng Shen sat at the end of the bed, and the boy sat in the corner with a candle. The little servant said, "It's beautiful and bright. It's a doctor's bamboo mat! " Zi Chun said, "Shut up!" Ceng Zi listened and said in fear, "Ah!" "Beautiful and smart," said the boy's servant. "That's a bamboo mat for doctors!" Ceng Zi said, "Yes. That's Ji Sun's. I didn't. (Zeng) Yuan, (help me) get up and change bamboo mats. " Zeng Yuan said, "Your illness is so serious that you can't move. If (if) you are lucky enough to arrive in the morning, you must change it according to your meaning. " Ceng Zi said, "You love me more than he (the footman). A gentleman loves from the height of moral principles, but a villain loves in a tolerant way. What else do I ask? I can get the right path (feudal ethics) and die, that would be perfect. " Help lift (his body) and change bamboo mats. When you put him back on the mat, he died before he lay down.

Knowledge training camp (3) 1. (1)1(2)1(3)1(4)1(5)1(6) 3 (7)1(8) 2. B. from mania to dryness; C. change arrogance into femininity; D. turn violence into explosion 3.a (b b. be careful: it is not negligent to describe it. Meticulous: careful and meticulous, not careless at all. C. lifelike: describe or imitate very realistically. Vivid: refers to the artistic image is very realistic, as if there is life. D. a hundred things are waiting to be done, that is to say, many things that have been put on hold are waiting to be set up. Everything is thriving, which means that many abandoned things stand up at once. (4.C 5。 (1) Add "may not" after "may" with a supplementary number. (2) Add "positive power of" at the end of the sentence with the complement number. (3) Switch the positions of "popularization" and "improvement" with the position adjustment number. (4) Replace "and" with "wear" by substitution number. 6.( 1) Who says there is no shortage of life? (2) Where petals flow like tears (3) Wandering in secluded paths? (4) You must leave me here and drift away. (5) Young and frivolous, he doesn't work hard, and big brother is sad. (6) In the dead of night, listening to the wind and rain, the dream of MOS Rail Glacier. 7.C8.A (It should have been taken away by Detective Sun. 9. Example: Go straight (north) (about 100 meters) and turn right at the intersection (about 20 meters east). 10. Examples of planning cases: project 1: the latest scientific and technological achievements exchange meeting project 2: watching scientific and technological movies project 3: small-scale scientific and technological production competition and other ingenious discoveries Example: people got inspiration from bats and invented radar; People got inspiration from the working principle of the swim bladder and invented the submarine. Example of irrigation area: Science and technology is a double-edged sword. We should make rational use of science and technology and pay attention to the advantages and avoid disadvantages. An example of the refutation stage: refuting the doomsday theory 1: Astronomers have calculated by formula that there are about 200 advanced civilizations that can contact the earth within the scope of the Milky Way. But this is theoretical data. In fact, the diameter of the Milky Way reaches 82,000 light years. In such a large range, it is extremely difficult to connect only 200 advanced civilizations. Therefore, it is extremely unlikely that aliens will come to earth. Refuting doomsday theory 2: the probability of near-earth asteroids hitting the earth is about 1 billion years 1 ~ 2 times. Armed with high technology, modern human beings can definitely overcome the bad luck of near-earth asteroids hitting the earth. They can detonate hydrogen bombs next to asteroids, or install "throwers" on asteroids to change their orbits. Refuting doomsday theory 3: According to the cycle of solar activity, 20 13 years will be the peak year of solar activity, when the number of sunspots reaches a great level, which may lead to the outbreak of solar flares. However, these have little impact on the earth and will only have some impact on short-wave communication on the earth. Refuting doomsday theory 4: In the history of the earth's development, geologists have found that there have been many magnetic field reversals, but none of them have caused the destruction of the earth. Geologists have found that even if the next reversal of the earth's magnetic field occurs, it will be 6,543,800 years later. Refutation of doomsday theory 5: Satellite data show that there is indeed a super crater in Yellowstone National Park in the United States, and it has been very active, but no signs of eruption have been observed for at least 20 12 years. Even if a super volcano erupts, it will only affect some parts of the earth. 1 1.( 1) error. (2) Zi Gong redeemed a state of Lu from the vassal states and refused to accept state compensation after returning to Lu. (2) What saints do can change people's customs and affect the behavior of ordinary people. 14. Confucius disapproved of the practice of zi gong; There are few rich people in Lu, and there are many poor people. It is not harmful to take their wealth. If you don't take their money, you won't redeem others. There is a law in Lu. The people of Lu were enslaved abroad. If someone can redeem it, they can go to the national treasury to redeem it. On one occasion, Zi Gong, a disciple of Confucius, redeemed a Lu native in the vassal state and refused to accept state compensation after returning to Lu. Confucius said, "Give (the name of Zi Gong), but you don't take good measures. What saints do can change people's customs and affect the behavior of ordinary people, which is not your personal business. Now there are fewer rich people in Shandong and more poor people. If you recover the state compensation, it will not damage the value of your behavior. You refused to get back the money you paid. From now on, the people of Lu will not be willing to redeem their compatriots who have become slaves. "

Knowledge training camp (4) 1.d (A.d τ n π is d τ n π, B.jin is π, shú is zhú, C.b π n is bπ n) 2.b3.b (A a. "Harmonious family atmosphere, good. "Cured" redundancy; D illogical, "social problems" cannot be juxtaposed with "income distribution, residential housing and social security") 4. Lip and teeth, fist and palm, head and face, eyebrow color, head, heart, confidant, ear and cheek, hand and foot, shoulder and heel, mouth and abdomen, eyebrow face, leather face, chest fullness, knee heart, head and ear, mouth and tongue 5.a6. 7. For example, if you are a grain, have you ever given birth to useful life? If you were the smallest screw, would you stick to your life forever? 8. Example: Thank you for your compliment. In fact, as long as you write with your heart and keep practicing, you can write well, and it will definitely look better than my handwriting. 9. Example 1: A healthy diet structure is like a pyramid: the bottom is grain, so you need to eat more; The second layer is melons, vegetables and fruits, so you should eat more. The third layer is dairy products and meat, fish, eggs and beans, which can be eaten in moderation; The top layer is oil, sugar and salt, so eat less. Example 2: What is the structure of a healthy diet? It should be: eat more grains, fruits and vegetables, eat milk meat, fish, eggs and beans in moderation, and eat less oil, sugar and salt. 10. Example: Self-esteem is achieved by respecting others. 1 1.( 1) The trip to Wan Li is still far away. (2) The sea clouds twinkle like palaces. (3) Once you reach the top of the mountain, you will see that other mountains are short in the sky. (4) The desert is lonely and straight, and the long river sets the yen 12. (1) Six brothers, Zhu Bajie and Erlang Meishan, the Monkey King (2)① Zhu ②. (2) For example, stars usually speak for their products for economic benefits, and often speak for their products without using or experiencing or even trusting them, which is extremely irresponsible to consumers. Consumers choose this product based on their trust and trust in celebrities, so celebrity endorsements should be cautious and have a minimum sense of moral responsibility. (3) For example, food is the first priority for the people, and safety is the first priority for food; Keep food safe, and everyone is happy and healthy. 14.( 1) Handover (2) Blurred appearance 15. (1) There are two cranes in Ren Shan. They are very docile and good at flying. (2) When it is windy and rainy, the sky is bright or dark. Looking down, the scenery in the mountains changes quickly. 16. Do whatever you want, or stand in the field or in the clouds, and return to Dongshan at dusk. 17. Expressed the author's yearning for seclusion. In the autumn of the tenth year of Xining, Pengcheng was flooded, and the water in Zhangjun Caotang in Yunlong Mountain was less than half of his home. The next spring, the flood receded and (Yunlong Mountain people) moved to the east of their former residence. At the foot of Dongshan Mountain, I climbed high and saw a strange situation. So he built a pavilion on the mountain. Pengcheng Mountain, the mountains are closed on all sides, vaguely like a big circle; It's just that there is a gap in the west, and the pavilion of Yunlong Mountain people is just facing that gap. When spring and summer alternate, the vegetation is lush and seems to be close to the sky; Snow and bright moon in autumn and winter are thousands of miles apart. Rain or shine, it changes rapidly. The mountain man has two cranes, very docile and good at flying. In the morning, let them fly to the gap in the western hills, where they fly, sometimes standing in low-lying ponds, and sometimes flying outside the sea of clouds in Wan Li; I flew back to Dongshan in the evening, so I named this pavilion "He Fangting".

Knowledge training camp (5) 1. Li Nvxun New II. A3。 Example: After discussion, we will make corresponding efforts to find a just and feasible solution to this problem that has puzzled the villagers for many years. 4.① In Yunnan, the hometown of China yew, the beautiful yew was devastated. Scientists recently claimed that all the gold on the earth came from a huge "meteor shower" about 4 billion years ago. 5.c6. See smoke in the mountains; Birds fly to the eaves; If the mountain is flying; Shuo Qi Chuan Jin Zhen; The general died in hundreds of battles; The tears of the double-sleeved dragon bell are dry; Whose flute flies in the dark; This serenade has the flavor of folding willows; Leaning alone in the dense bamboo; The voice is too low for anyone to hear; Mid-Autumn Festival in Emei Mountain. Yuelu Academy in Hunan (d) Qiaojia Courtyard in Shanxi (a) Daming Lake in Jinan (b) Former Residence of Gong Zizhen in Hangzhou (c) 8. (1) they enjoy the joy of struggle! Only the dead will go with the flow and enjoy this ease and comfort! 9.b 10。 (1) Nautilus, Captain Nemo, IV (2) Example: Monkey King Thrice Defeats the Skeleton Demon, three borrowed banana fans (3) Whose biography: Beethoven 1 1 Example: It reflects the phenomenon that some people in today's society lack moral concepts. 12. Example of activity planning: (1) Human kindness (2) Kindness to the Yellow Sea (3) Great love on earth (4) Example of spiritual home leads Grandpa Zhang, hello! Your selfless spirit of great love is worth learning. In this materialistic society, you can care about the poor at the bottom and make many people feel ashamed. Example of brand solicitation: (1) I chose "Suntech Yellow Sea". Suntech advocates truth, goodness and beauty, is concise and easy to understand and spread. (2) I chose For Huang Hai. This brand can reflect the kindness and kindness of our Huanghai people. (3) I chose Emotional Yellow Sea. It is full of affection and can make people feel the true feelings of the Yellow Sea. (4) I chose Honesty Yellow Sea. Briefly tell people that the Yellow Sea is an honest and trustworthy city. 13.( 1) Therefore, (2) 14. (1) These are all examples of early addiction and later awakening. (2) People who learn from childhood are like the light of sunrise; People who start learning when they are old are like walking at night with torches, but they are better than those who can't see anything with their eyes closed. 15. Young scholars, such as the light of sunrise, old scholars, such as nocturnal walking by candlelight. (or early childhood education, don't miss the opportunity. If you lose your prime, you should still be studying that night. Don't give up. ) 16. Example: In his twilight years, the martyrs were either full of courage or old and ambitious. When people are young, their thinking is sharp, and when they grow up, their thinking is easy to disperse. Therefore, we should educate our children as early as possible and don't miss the opportunity. When I was seven years old, I recited "Lingguang Dian Fu". To this day, I look back every ten years and have never forgotten it. After the age of 20, the back sutra was left there for a month, and it was abolished. Of course, people will always get into trouble, and when they are in their prime, they lose the opportunity to learn. They should seize the time to study in their later years and not give up on themselves. Confucius said, "You don't make a big mistake when you learn the Book of Changes at the age of fifty." Wei Wudi and Yuan Yi, who studied harder when they were old, are both examples of diligent study since childhood. Ceng Zi began to study at the age of seventy and finally became famous all over the world. Xunzi began to study in Qi at the age of fifty, and still became a great scholar. Gong began to read Spring and Autumn Annals in his forties and finally became prime minister. Zhu Jun didn't learn the Book of Changes and The Analects until he was forty, and Huangfu Mi didn't learn the Book of Filial Piety and The Analects until he was twenty. They all became great scholars in the end. These are all examples of early addiction and late awakening. Most people say it's too late to start studying as an adult, so it's stupid to get along with each other day after day like standing on the wall and seeing nothing. People who learn from childhood are like the light of sunrise; People who start learning when they are old are like walking at night with torches, but they are better than those who can't see anything with their eyes closed.

Pomegranate is full of branches 1. Time. Mother takes good care of pomegranate trees; Mother closely guarded the pomegranate tree; Mother took it off and gave it to the neighbor's children. 2.( 1) Laughter uses personification rhetoric to vividly write the number and size of pomegranate. (2) The Exploration vividly writes the modality of pomegranate fruit when it just comes out of the branch with anthropomorphic rhetoric. In that era of material shortage, all the children living in our family could eat sweet pomegranate. 4. Memories of poor life in the past, and apologies for not giving more pomegranates to children in the era of lack of material living conditions. 5. Lyricism (lyricism by borrowing things); Gratitude, love

Happiness of a pen 1. Pen; Daughter helps friends who drop out of school because of family poverty to return to school; Caring for each other will make society more harmonious and beautiful. 2. "A pen" in the article implies that Zhao Xue and Zhao Xue are ready to drop out of school for family reasons and are happy with the help of their daughters and others. 3. Interpolation; Explain the reasons why Zhao Xue dropped out of school, and pave the way for the following daughters and others to "prescribe the right medicine" and save Zhao Xue. 4. "Stunned" shows that her daughter is surprised and at a loss about Zhao Xue's move; Running away with tears shows Zhao Xue's reluctance to leave school and friends. 5.① Daughters and others pass "working"; Tuition fees collected for enrollment; (2) convince Zhao Xue's father; The teacher found a job for Zhao Xue's father; (4) The daughter persuaded "we" to support Zhao Xue. Finally, with the help of her daughter and others, Zhao Xue returned to the classroom. 6. The ending either implicitly or explicitly encourages Zhao Xue to concentrate on finishing his studies without worrying about tuition fees. While deepening the center, she also took care of the theme of the article, making the structure of the article more rigorous.

Fast Liu 1. When changing the trick of "small bowl nail", both hands are extremely agile. 2. It's amazing to open it. 3. Example: The props are simple, and the trick of "small bowl spike" is changed under the gaze of a circle of people around, so people can't see the flaw. 4. Example: (1) I had a daydream at that time: his hands seemed to be double-layered, and the ball was always hidden in the interlayer. Function: By describing the psychological activity of "I", the ability of "Fast Liu" to become "magic" is highlighted. People looking around sighed in surprise. Function: Use people's surprised expressions to set off the high skills of "Fast Liu" to become "magic". 5. Admiration and appreciation for the superb skills of "Fast Hand Liu", gratitude and nostalgia for childhood happiness. 6. Poet Fairy-Li Bai Shi Gui-Li He Black Cyclone-General Li Kui JYFei-Li Guang

Ziziphus jujuba 1. Description; Write the commonness of Zizyphus jujuba from the aspects of height, shape, branches, branches and roots, which paves the way for the following Zizyphus jujuba praise. 2. This sentence vividly describes the tenacious vitality and indomitable spirit of Zizyphus jujuba by anthropomorphic rhetoric, and expresses the author's praise for Zizyphus jujuba. 3.D 4。 By comparing Zizyphus jujuba with Parthenocissus tricuspidata and Phyllostachys bambusa, it highlights the strong, quiet and indifferent quality of Zizyphus jujuba and deepens the center of the article. 5. exclamation point; Exclamation marks can be used to express the author's sincere praise for Zizyphus jujuba's indomitable and silent dedication, with strong tone and eye-catching. 6. Willing to be ordinary, silently dedicated, strong and unyielding, quiet and indifferent.

Warm reed flowers 1. Because reed flowers are light (dull and indifferent), vigorous (lasting) and warm (reed roots can remove dryness, reed flowers can be used as pillow cores, which contain maternal love). 2. Highlight the author's praise for Lu Hua; Draw out the object described in this article; It also adds poetry to the article. 3. Connecting the preceding with the following. 4. Metaphorically personification, reed is like a painting drawn with simple brushstrokes, like a play sung with plain faces in the sky, vividly expressing the lightness of reed. 5. No, writing about waterfowl shows the tranquility and harmony of reeds from the side. 6. Expressed the author's calm and open-minded feelings, being able to face the "cold winter" of life calmly, only seeking to benefit the society and the glitz born in Dont Ask For Help.

Love registered flowers 1. No one is rooted in poverty-stricken areas because of love; Tongwei people like to grow flowers. 2. Example: The author uses short sentences, which are light and fresh, reminiscent of the busy and hard scene of flower lovers. The combination of two "not afraid" and several coherent verbs shows the meticulous care and love of flower farmers. 3. Example: No; Stealing is a bad illegal act. In the eyes of flower growers, flowers are planted for people to appreciate, and it is a pleasure to provide beauty to those who love beauty. Even if it is secretly picked, it is worthy of happiness. So we use "lost" instead of "stolen" here. Once all the registered flowers of love are in full bloom, the gloomy world suddenly becomes rich. Revelation: No matter whether you are poor or rich, no matter what kind of situation you are in, as long as you have love in your heart and live with your heart, life will be better. Love can change everything. 5. Summarizing the full text and deepening the center of the article have the effect of making a statement.

Everyone knows the secret 1. This title sets suspense and attracts readers; It reflects the deep father's love and the daughter's love for her father, and highlights the center of the article. 2.( 1) Chai Jing was moved by this deep fatherly love. (2) I feel sorry for my father's illness, but at the same time I have to pretend that I don't know my father's illness and can't take my father to treat it. On the one hand, the father who has cancer is afraid that his daughter will affect the college entrance examination after knowing his illness, and even conceal his illness and refuse treatment. On the one hand, the daughter is afraid of her father's worry, even though she knows that her father is ill, she deliberately pretends not to know. Here, we see the most precious thing in the world-affection. This spirit deserves to be widely read and learned. 4. She kept their secrets for Mr. Jiang and his daughter and cared for their silent love, which showed Chai Jing's indifference to fame and fortune. 5. Example: Through the misty eyes, she saw the tenderness flowing in the tall body of a father, which was like a kind of rest, and it didn't need much confession, but it was enough to break people's hearts. 6. This article is original and fascinating. At the beginning, it says that Chai Jing's interview is over and he is ready to leave. A student's words made her realize that the interview was not over yet, so she turned back and came back with a 10% discount; When she learned the secret of Mr. Jiang, she was deeply moved. When she left, she saw the girl crying in the corner, which led to the second secret, so she was born again. Originally, Chai Jing was going to do a program, but in order to keep it secret for everyone, he gave up reporting the program and got a 30% discount. The twists and turns of the article deeply touched us.

Radioisotope-the protagonist of nuclear radiation 1. ① Radioisotope ② Half-life of radioisotope ③ Application of radiation ②. List figures, examples, explanations and comparisons. Example 1: column number. For example, most natural elements are composed of several isotopes. At present, there are more than 300 known stable isotopes, and more than 500 radioactive isotopes are/kloc-0. Function: By enumerating figures, the characteristics of more radioactive isotopes than stable isotopes are accurately and concretely explained. Example 2: Example. For example, the half-life of iodine 13 1 in nuclear radiation caused by Japan's "3.1"earthquake and tsunami is about 8 days, cesium 137 is 30 years, plutonium 239 is 24,000 years, and uranium 238 is 4.47 billion years. Function: List typical cases, speak with facts, and more specifically and truly explain the characteristics of different radioactive isotopes with large half-lives, which is convenient for readers to understand. Example 3: Explanation. For example, an isotope is an element composed of several atoms with the same number of protons but different numbers of neutrons. Function: It is convenient for readers to understand that isotopes have the same number of protons but different numbers of neutrons. 3. It cannot be deleted. "Most" is limited in scope, the explanation is not all, "Now" is limited in time, and the explanation is only the discovery now. If these two words are removed, the explanation is not accurate enough. 4.b5. Tip: The development and utilization of nuclear energy has many benefits. It will not produce air pollution like fossil fuels such as coal and oil, nor will it emit greenhouse gas carbon dioxide. However, the development and utilization of each energy source is accompanied by various drawbacks, such as the nuclear radiation brought by the Fukushima nuclear power plant. Science is a double-edged sword with both advantages and disadvantages. As long as we respect and believe in science, we can develop and utilize nuclear energy well.

Utilization and substitution of bear bile 1. The medicinal and health value of bear bile products, and the basic principles of the utilization of bear bile products and wild animal products. 2. Bear bile product is a kind of medical and health care derivative, but it is not a necessity for human beings. Even as an essential medicine for human beings, we should follow some principles that conform to the goal of animal protection. 3. No, "under normal circumstances" refers to excluding the special circumstances that the human body secretes bile for external reasons, which reflects the accuracy and rigor of the explanation language. 4. The demand for luxury goods is unnecessary. Because the best way to protect the liver is to drink less and not too much, there is no need to eat bear bile products. 5. Give an example. Specific examples fully and forcefully show that alternative methods can be used to reduce the use of bear bile.

Neighbor's "green embroidered eyes" 1. After many failures, "I" finally shot a "green embroidered eye". 2. Environment; Explained the location of the incident, rendered a quiet and beautiful atmosphere, and set off the happy mood of "I". 3. Like to eat nectar; Like group activities; Fast feeding, changeable posture and so on. 4. "I" want to find a slender, agile and active figure with green embroidered eyes among the crisscross twigs and petals. Praise or admire