Friendly reminder: please examine the questions carefully, answer the questions carefully, relax a little, believe in your own strength, and wish you success!
(Full score of this volume 150, ***4 pages, examination time 100 minutes)
The book title is 12345678. The total score and the total score are divided.
score
First, choose carefully, and you will definitely choose the right one! There is only one correct answer to each question, with 4 points for each question and 40 points for * * *.
1. As shown in the figure, among the following statements, the correct one is ....................................................... ().
A. Because ∠ A+∠ D = 180, AD ∠ BC B. Because ∠ C+∠ D = 180, AB ∠ CD.
C. Because ∠ A+∠ D = 180, AB ∠ CD D. Because ∠ A+∠ C = 180, AB ∠ CD.
2. The translated position of the number n in Figure ① is shown in the 5×5 grid in Figure ②, so the correct translation method is ().
A. Move 1 grid down first, and then move 1 grid left. B. Move down 1 grid first, and then move 2 grids to the left.
C. First move down 2 squares, then move left 1 square D. First move down 2 squares, then move left 2 squares.
Question 1 question 2 question 8
3. The lengths of two sides of a triangle are 2cm and 7cm respectively, and the length of the other side is even, so the circumference of this triangle is … ().
A.13cm B.15cm C. 17cm D.15cm or17cm.
4. If the sum of the inner angles of a polygon is equal to the sum of the outer angles, then the polygon is ............................. ().
A. Quadrilateral pairs
B. Pentagon C. hexagon D. heptagon
5. In the following operation, the correct result is ................................................. ().
a . a2+a2 = a4 b . A8÷a2 = a4 c .(a3)2 = a5 d . 2x？ 3x5=6x6
6. The result of calculating (x-y) (-y-x) is .......................................................... ().
A.-x2-y2 B.-x2+y2 C.x2+y2 D.x2-y2
7.A2+4A+K is a completely flat way, and K should be
A.2 B.4 C. 4 D.-4
8. As shown in the figure, in a square with a side length of A, dig out a small square with a side length of B (A > B), cut the remaining part into a rectangle, and verify an equation by calculating the areas of the shadow parts of two figures, then this equation is … (C) D.
A.(a+2b)(a-b)= a2+a b-2 B2 b .(a+b)2 = a2+2ab+B2
C.(a-b)2 = a2-2ab+B2 d . a2-B2 =(a+b)(a-b)
9. As shown in the figure, draw a circle with a radius of 2 with the three vertices of the triangle as the center, and the area of the shaded part is ............... ().
A.π b.2π c.3π d.4π pairs
10. In the two sets of "Happy Dictionary" columns of CCTV, the title of the first issue is shown in the figure. If both scales are balanced, compare them with two balls.
The number of cubes with equal mass is ............................................... () a.
A.5 B.4 C.3 D.2
Question 9, question 10
Second, can you fill it out quickly and accurately? (4 points for each small question, ***32 points)
1 1. Calculate (-P2) (-P) 3 = (-A2B) 3 =
12.-2ab(a-b)=(a+ 1)(a-3)= 1
13. In the global financial turmoil, in order to promote economic growth, the Chinese government announced that it would invest 4 trillion yuan before the end of 20 10 to stimulate domestic demand and promote steady and rapid economic growth. Please use scientific notation to represent 4 trillion yuan.
14. When s=t+, the value of the algebraic expression S2-2st+t2 is.
15. After a hotel is renovated, consider laying carpets on the main staircase of the main hall. It is known that the staircase is 3m wide, as shown in the figure. Please calculate the m2 carpet needed for laying this staircase.
Question 15, question 18
16. If a person starts from point A, goes 30 northeast to point B, then starts from point B and goes to point C in the southeast15 direction, then ∠ABC is equal to.
17. If the two sides of an isosceles triangle are 3 cm and 7 cm respectively, then its circumference is 3 cm.
18. Draw an isosceles right-angled triangle ∠ AOB = 45, translate the triangle to the dotted line as shown in the figure and rotate it counterclockwise around point M, then the included angle α between the hypotenuse of the triangle and the light OA is 0.
Third, the calculation questions: (7 points for each small question, *** 14 points)
19.-2-(-)-2÷(π-3. 14)0 20.2(m+ 1)2-(2m+ 1)(2m- 1)
Fourth, factorization: (7 points for each small question, *** 14 points)
2 1.2x 2- 12x+ 18 22 . a2(x-y)+B2(y-x)
Verb (abbreviation of verb) for solving equations: (7 points for each question, *** 14 points)
23.24.
The intransitive verb is ingenious-draw a picture by hand: (6 points for each question, *** 12 points)
25. Translate the triangle in the diagram along the direction of MN, and the translation distance is the length of MN. After translation, draw a new graph.
26. Divide the triangle below into four triangles with equal area, and draw at least two different pictures.
7. Exploration and research: (Mathematics activities are full of exploration and creation, and I believe you will actively explore and experience the value of mathematics) (this is entitled *** 12)
27. Experiments have proved that the law of light reflected by a plane mirror is that the light incident on the plane mirror and the reflected light are equal to the acute angle sandwiched by the plane mirror.
(1) As shown in the figure, a beam of light M hits the plane mirror, is reflected by A to the plane mirror B, and is reflected by the mirror B. If the light N reflected by B is parallel to the light M, and ∠ 1 = 50, ∠ 2 = 0, ∠ 3 = 0.
(2) In (1), if ∠ 1 = 55, ∠ 3 = 0, if ∠ 1 = 40, ∠ 3 = 0.
(3) From (1) and (2), please guess: When the included angle between two plane mirrors A and B is ∠ 3 = 0, any light M incident on plane mirror A can be made parallel to the reflected light N after being reflected twice by plane mirrors A and B? Please provide a justification for the answer.
Eight, operation design: (this question 12 points)
28. As shown in Figure A, it is a rectangle with a length of 2m and a width of 2n. Divided into four small rectangles evenly along the dotted line in the figure, and then spliced into squares according to the shape of Figure B. ..
(1) The shaded area in Figure B is.
(2) Look at Figure B, please write the equivalent relationship between three algebraic expressions (m+n)2, (m-n) 2 and m-n)2.
(3) If X+Y =-6 and xy=2.75, use the equivalence relation provided in (2) to calculate: X-Y =.
(4) In fact, there are many algebraic identities that can be expressed by the area of a graph, as shown in Figure C, which indicates that
2m2+3mn+n2=(2m+n)(m+n)。 Try to draw a geometric figure with an area of a2+4ab+3b2. You can use this.
The graph decomposes a2+4ab+3b2.
The seventh grade mathematics examination paper reference answer.
First, multiple-choice questions (4 points for each small question, 40 points for * * *)
1-5 C C D A D 6- 10 B B D D A
Fill in the blanks (4 points for each question, * * * 32 points)
1 1.P5， 12。 -2a2b+2ab2，a2-2a-3
13.4× 10 12 14. 15. 10.8 16.45 17. 17 18.220
Three. Calculation questions (7 points for each question, *** 14 points)
19. Solution: -2-
=-2-4 ÷1....................................... 4 points.
=-6-7 points.
20. Solution: 2 (m+1) 2-(2m+1) (2m-1)
= 2 (m2+2m+1)-(4m2-1) ........................................... 4 points.
= 2 m2+4m+2-4 m2+ 1 6 points.
=-2 m2+4m+3 7 points.
Fourth, factorization (7 points for each small question, *** 14 points)
2 1. solution: 2x2- 12x+ 18.
= 2(x2-6x+9)4 points.
= 2(x-3)2 7 o'clock.
22. Solution: -a2(x-y)+b2(y-x)
= A2 (x-y)-B2 (x-y) .................................................. 2 points.
=(x-y)(A2-B2)4 points.
= (x-y) (a+b) (a-b) 7 points for .....................................................
Verb (abbreviation of verb) to solve equations (7 points for each question, *** 14 points)
23.
Solution: Substitute (2) into (1) to get:
2 (1-y)+4 y = 5 .................................................... 2 points.
Solution: y =……4 ... 4 points.
Substituting y= into (2) gives:
X =……6 ... 6 points.
The solution of the original equation is 7 points.
24.
Solution: (1) × 3:15x-16y =12 (3) 4
(2) x 3: 4x-6y =-10 (4) 2 points for .......................................
(3)-(4): 1 1x=22, x = 2 ... 4 points.
Substituting x=2 into (2) gives: y = 3……6 ... 6 points.
The solution of the original equations is
Intransitive verbs are unique (6 points for each question, *** 12 points)
25. sketch
26. (For reference) Draw a picture and give 3 points.
Seven, exploration and research (12 points)
( 1) 100 90 ...................................................................................................................................................（
(2) 90 90 ............................................................................................................... (2 points for each space, ***4 points).
(3) 90 ...................(2 points)
Reason: Because ∠ 3 = 90.
So ∠ 4+∠ 5 = 90
From the meaning of the question ∠ 1=∠4, ∠5=∠6.
So ∠ 2+∠ 7 =180-(∠ 5+∠ 6)+180-(∠1+∠ 4).
=360 -2∠4-2∠5
=360 -2(∠4+∠5)
= 180
From the parallelism of two lines with complementary internal angles on the same side, we can know that: m ‖ n...................(2 points).
Eight, homework design (this question *** 12 points)
(1)m2-2mn+n2 or (m-n) 2 .............................. (2 points).
(2) (m+n) 2 = (m-n) 2+4mn ..................... (2 points).
(3) 5 .......................... (2 points)
(4) Party A, Party B and Party B
A2+4ab+3b2 = (a+b) (a+3b) .................... (3 points).
New experimental school seventh grade Chinese (second) mid-term examination paper
Total grade: 120 minutes: 120 minutes.
Dear students, half a semester has passed in an instant. Lost time, shed sweat and gained success. This test paper takes you into the orchard of knowledge. Please enjoy picking your own sweet fruits and wish the students good results!
1. language accumulation and application (30 points))
1. Write Chinese characters or add phonetic symbols according to pinyin: (4 points)
Rough () () wòchuo () ()
Give up on the edge of ().
2. Find out four typos in the following idioms and correct them. (4 points)
There are only a handful of people who are frustrated and injured.
Innocence can bring out the best in each other, which is little known.
A mispronounced or misspelled character.
Make corrections
3. Choose the most appropriate sentence to connect with the following sentence: () (2 points)
After the shower, the grassland washed by rain is fresher and greener, like a huge sapphire; _ _ _ _ _ _ _, but like countless Jin Gangzuan.
A, the grass tip is covered with water drops b, crystal clear water drops.
C, countless water droplets on the grass D, the water droplets were covered with grass tips.
4. According to the requirements of contextual coherence, the item to be filled in the next horizontal line is () (2 points).
I walked around the market in the town, and the goods were dazzling, including fresh green and sparse lai and fruit, and even the unique "fish dragon array" in that water town.
A. there are delicious mountain vegetables.
B.there is a faint taste of delicacies.
C. there is a smell of wild vegetables.
D. there are wild vegetables that are being destroyed, giving off bursts of fragrance.
5. Fill in the blanks by dictation (8 points)
(1) oiled birds are singing here, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
In these four years, I have experienced hardships, _ _ _ _ _ _ _ _ _ _ _ _ _ all kinds of hardships, all kinds of hardships, all kinds of hardships.
(3) Chang Jian's "Zen State after the Broken Mountain Temple" describes the quiet environment and the poet's inner purport.
"____________________,_____________________。 ____________________,_____________________。
(4) Du Fu's "The Story of Climbing Yueyang Tower" vividly describes the magnificence of Dongting Lake as "_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _"
6. Oral communication (3 points)
Now that you have grown up, your joy is beyond words. At this time, your heart will be filled with sincere feelings. For example, thinking about society, nature, knowledge, curriculum reform experiment, parents, teachers, partners ... please choose an object to express your gratitude.
_______________________________________________________________________________________________________________________________________________________ ____________________________________________________________________________。
7. Imitation (4 points)
Nature can give us a lot of enlightenment: mature ears of rice bow their heads and tell us to be modest; A group of ants carried the bread away, which is telling us that Qixin wants Qi Xin to work together;
___________________________________________,_____________________________________________。 ___________________________________________,_____________________________________________。
8. Comprehensive exercises (3 points)
(1) Appreciate the charm of books-love reading: The world of books is a colorful world, and the company of books will be the greatest happiness in life. Please write a famous sentence about "love reading" as your motto. ( 1)
My motto is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(2) Please recommend one of your favorite masterpieces to your friends and give the reasons for the recommendation. (2 points)
Classics I recommend: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
My reasons: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Second, reading comprehension and appreciation (50 points)
(1) Read the following paragraphs and complete the following 1-5 questions as required. (14)
Formation of typhoon
Because typhoons are formed in tropical seas, they have a lot to do with climate warming. In summer, the southeast trade winds in the southern hemisphere cross the equator and turn into southwest monsoon to enter the northern hemisphere. The southwest monsoon meets the northeast trade wind in the northern hemisphere, forcing the air to rise and increase.
Coupled with convection, it often causes fluctuations and eddies. The latter is combined with the original convection and amplified, so that the air around the low-pressure vortex flows into the center of the vortex. The faster the inflow, the greater the wind speed. When the ground speed () of these winds is () or () 17. 2ms, it is called typhoon.
Typhoons occur in summer and early autumn. After autumn, the direct part of the sun moves south, and the southeast trade winds in the southern hemisphere cannot invade the northern hemisphere, so there is less chance of forming a typhoon. Typhoons in the northern hemisphere mostly occur in July, August and September.
A mature typhoon vortex generally has a radius of 500krn-1000km and a height of 15krn-20 1km, which consists of two parts: the peripheral area, the maximum wind speed area and the typhoon eye. The peripheral wind speed increases from outside to inside, with spiral clouds and precipitation. The strongest precipitation occurs in the maximum wind speed area, with an average width of 8km- 19km, and there is a circular cloud wall between it and the typhoon eye.
The hazards of typhoons are mainly manifested in three aspects. One is strong wind. The maximum wind force near the typhoon center is generally above 8. The second is heavy rain. The area where the typhoon passes can generally produce 15mm-30mm rainfall, even exceeding1000 mm.
Heavy rain. The third is storm surge. Generally, typhoons will increase water in coastal waters, and the maximum water increase in coastal areas of Jiangsu Province can reach 3m.
Typhoon paths in China can be roughly divided into two categories: one is westward: the typhoon moves from the east of the Philippines to the west, passes through the South China Sea, and finally lands on Hainan Island or northern Vietnam. The second type is the landing type: the typhoon moves to the northwest and passes through Taiwan Province Province.
The strait landed on the coast of Guangdong, Fujian and Zhejiang, and gradually weakened into a low pressure. This type of typhoon has the greatest impact on China, such as "Yunna" in 2004 and "Mai Sha" in 2005. The second type is parabolic: the typhoon moves to the northwest first.
The moving direction, when approaching the eastern coast of China, turns to the northeast without landing, and turns to the vicinity of Japan, with a parabolic path.
1. Choose the correct word () in the brackets in the last sentence of paragraph 1. (3 points)
A. reach b, reach c, surpass d, reach e, surpass f.
2. In paragraph 3, "average" and "accessible" are used to explain the vortex radius and height of typhoon. What are the advantages of using such words? (3 points)
3. In what order was this article written? (2 points)
4. After you have mastered the content of each paragraph, fill it with concise language (3 points).
The formation process of typhoon and its path in China.
Please summarize the content of this article in one sentence. (3 points)
(2) Read Learn to Be Grateful and answer question 6- 10. (16)
Learn to be grateful
There is a Thanksgiving Day in the west. On that day, we ate turkey, pumpkin pie and cranberry jam. On that day, no matter how far away the children are, they must hurry home.
There is always a pity that there are many festivals in our country, except for the lack of a Thanksgiving Day. We can eat turkey, pumpkin pie, cranberry jam, or go home in Wan Li, but all this is not for gratitude. The excitement of reunion is always more than gratitude.
Without sunshine, there would be no warm days; , ;
, ; Without affection, friendship and love, the world would be lonely and dark. These are simple truths that no one will understand, but we often lack a grateful heart and psychology.
" , "; " , "; The poems we recited when we were young were about gratitude, the grace of dripping water, and the return of spring to the earth; The old China idiom, which has lasted for many years, tells us that we should also be grateful. However, such an old saying has not penetrated into our blood. Sometimes, we often forget that we need to be grateful for life and life.
After bees collect honey from flowers, they know how to hum their thanks. The breeze blew the coolness of the leaves, and I knew I was whispering my thanks. However, we are not as good as bees and leaves. Sometimes, we often forget to be grateful.
Yes, the enemy of gratitude is ingratitude. However, there are only a few people who are truly ungrateful. Most people often give their help and friendship, kindness and virtue to others, and take it for granted, so they are easy to ignore or forget, and consciously or unconsciously stand on the opposite side of gratitude. Isn't it? The love our parents give us is often trivial but meticulous. Not only do we often feel that this should be the case, but we also feel that they are tired of saying too many old sayings. And what about ourselves? Even if it is the birthday of a classmate or lover, you won't miss their party. It is not surprising that you can't remember your parents' birthdays.
People who know how to be grateful are often humble and awe-inspiring. Treat people who are weaker than themselves and know that they have to bend down and belong to the former. I feel that God knows how to look up, which is the latter. Therefore, people who are weaker than themselves, even if they give themselves even a little help, dare not despise them and cannot forget them. People who bow down in the church look up at the sunshine in the stained glass window of the church with gratitude. Even if I don't believe in the existence of God, I am always moved by that look.
People who hate more than love often lack gratitude. People who are full of resentment and hatred are easy to be like fields flooded by rain, and it is difficult to absorb new water and grow grateful flowers or seedlings.
People who don't know how to repent are generally prone to lack gratitude. There is a simple reason. Such people are always self-centered. He is right about everything. He never makes mistakes. How can he care about the help given by others, especially pointing out his mistakes and making up for them? Not only do you not care, but you may also feel that such help is unnecessary or embarrass him in person. Such a person's heart is like a frozen concrete floor. The water can't get wet, and it's hard to get out of the insects, and even the faint voice of gratitude can't be sung.
6. According to the context, imitate the sentence pattern of the underlined sentence in the third paragraph of the selected text, and then write two more sentences, thus forming a coherent parallelism sentence. (4 points)
, ;
, ;
7. There are many famous expressions of gratitude in ancient poems. Please write two of them and fill them in the horizontal line in the fourth paragraph. (4 points)
8. What is the focus of this article? (2 points)
9. According to this article, in real life, many people don't know how to be grateful because (2 points).
10. In paragraph 7 of the article, the author thinks: "People who know how to be grateful are often people with modesty and virtue, and people with awe." Do you agree with the author? If you agree, please provide another factual argument for this view; If you disagree, please add factual arguments to refute the author's point of view. (4 points)
(3), classical Chinese reading (10)
Yellow Crane Tower
In the southwest corner of the city, there is the Yellow Crane Tower. The Book of Painting says, "It's a shame to be immortal. I once brought the Yellow Crane back here, hence the name." The things listed in The Legend of the Immortal trace back to the ambition of "explaining differences". Look at its towering structure, high-standard pet cistanche deserticola, leaning against Hehan, downstream; Double eaves wing pavilion, four rosy clouds open; Peek at Jing Yi and shoot clouds: Jing Hewu is the best.
1, the beautiful scenery of the Yellow Crane Tower is always led by the word "".
The sentence explaining the origin of the naming of the Yellow Crane Tower is:
What is the rhetorical device of "leaning against the river and flowing downstream"
2. In the following four sentences, what is different from the explanation of "building a house under the name" is () (2 points).
A, Xu is smoking, B, with a deep and strange shadow.
C, made of tile, moved like D before, and sent his wife to meet Yu Hao's wife, which led to Chai Jin.
3. Underline the reading pauses of the following sentences. ( 1)
The things listed in The Legend of the Immortal trace back to the ambition of "explaining differences".
4. Translate sentences:
(1) is also the best in Jing and Wu. (2 points)
(2) the building named after it (2 points)
The reference answer of the seventh grade (below) Chinese examination paper
I. (30 points)
1, bright, dirty, bιn, bιng
2, injury (funeral), wall (wall), bow (shoulder), makeup (makeup)
3、D
4. A (the sentences before and after the stem are all "XX with XX (concrete things)", and all four options are this sentence, but the "fragrance" in B, C, D, C and D is not concrete things, only the "mountain eating wild house" in A is concrete things, which is the same as the "vegetable, fruit" in the previous sentence and the "fish dragon array" in the next sentence. )
5.( 1) Crickets play the piano here.
(2) Suffering from inhuman abuse
(3) My road twists and turns, through a sheltered valley, branches and flowers, to a Buddhist retreat. Here, birds live in the mountains, and people's hearts feel calm in the pond (
(4) There is Wu in the east and Chu in the south, and there is no end to heaven and earth.
6. The language is coherent, the words are taboo, and points are given as appropriate.
7. Bees are flying around among the flowers, telling us to be diligent; The river runs day and night, telling us to cherish time.
8, reading thousands of books, writing like a god.
Books are the ladder of human progress.
The reason should conform to the content of the famous book.
Second, reading appreciation.
(a) the formation of the typhoon (15)
1.(3 points) 1 points d, a, C A, c.
2.(3 points) This statement reflects the accuracy of explaining the language. show
The explanation does not include special phenomena, which reflects the scientific nature of the explanation text. As long as you get it right.
You can give three points for one point. )
3.(3 points) In logical order.
4.(3 points) Time (or season) of typhoon (1 min); Area, height and component of typhoon; (1) Main manifestations of typhoon danger. (3 points)
5.(3 points) This paper expounds the formation process, occurrence time, typhoon path and the main manifestations of its harmfulness.
(2) Learn to be grateful (16)
14. Original reference: Without rain and dew, there would be no bumper crops; Without water, there is no life; Without parents, there would be no ourselves. (4 points)
15. Reference: whoever speaks with grass in his heart will enjoy three rays of spring; Who knows every grain of Chinese food is hard; My heart is grateful for blood, a drop of blood stained the world. (4 points)
16. Learn to be grateful, (2 points)
17. It is easy for us to ignore or forget the kindness that others give them for granted. (2 points)
18. (If meaningful) (4 points)
(3) Yellow Crane Tower (9 points)
1, always headed by the word "view"
"Illustration" "Fei taboo immortal, driving the yellow crane to rest here, become a famous building."
Dual technology
2、B
4. Writing requirements: clear and centered
3. The ins and outs of the matter/The Legend of the Immortal, the traces of existence/the ambition of Interpretation.
4. It is also the most beautiful place in Chu and Wu.