1. Understand points, lines and faces in space first.
2. Then understand the relationship and characteristics of points, points, planes, lines, planes and planes in space.
3. With regard to straight lines in space, we need to know the relationships and conditions such as parallelism, intersection, verticality, out-of-plane straight lines and the distance between two straight lines. For straight lines and planes in space, we should understand the conditions of their intersection, parallelism, especially verticality and so on.
In the later period of space geometry in senior high school mathematics, what I learned was the content of 1, 2, 3 in applied space geometry.
Finally, I have to learn the analytic geometry of space.
My brother holds a book all day, with short hair and a pair of eyes on his nose. He is very tall. When I look at him, I must hold my head high.
My parents took me to my brother's house. My brother came out of the study with a book in his hand and greeted my parents: "Hello, uncle." My parents also nodded again and again: "Good, good." After that, my brother returned to the study, sat on the sofa, crossed his legs, put the book on his leg and began to read with relish. All the guests are in the charge of the aunt. Followed my brother into the study, "Wow!" The bookcase is full of rows of books, and there are several boxes on the ground, all of which are books. Classical works, history, essays, novels ... if you can name the title, he should have it all.
On Sunday, we went to grandma's house for dinner. He came with a bag in his hand. what did you have in your bag？ Not another book. Sure enough, as I expected, it was books, after class and in class. As soon as my brother put down his bag, he dug out a book, what "Can mosquito blood really make dinosaurs?" What a novel book!
After dinner, there were big fish and meat on the table, but these dishes didn't attract my brother. My brother filled his meal, picked up chopsticks and ate it quickly, mixing the dishes together and shoveling them into his mouth, as if he were afraid that all the dishes would be eaten soon. After eating, I put chopsticks on the table and crossed my legs to read. It has been replaced by another book called Curious African Animals and Plants. I said, "Have you just finished reading one?" He didn't hear it, nor did he hear the good TV series next to him. Grandma gave us fruit, but he didn't notice.
On the way to the car, he took out an extra-curricular book from his bag, leaned against the car seat and watched with rapt attention. I thought: won't my brother have a headache? The car is swaying, no wonder it's nearsighted. He is such a bookworm that he loves reading to such an extent.
This is my brother. He is a book fan. Every minute is occupied by books.