It is a one-day life of Wei Hua. She gets up before 7:00 in the1 and quickly2her face. She goes to school early. She3hard（努力地） in class（在课堂上） all day.She4basketball after school, and then5home.

    Wei Hua's6is  broken(坏了) in Maths lesson, so he needs a new one. On her way home（在回家的路上）, she buys a new pen at a7When she8home, she has a short9After that she10her parents. She cooks supper and11the house.

    She watches TV for half an12after supper. Then she starts her homework. She finishes it13half past nine. She goes to14before a quarter to ten. How15Wei Hua is!

设θ是第三象限角，且|cos$\frac{\theta }{2}$|=﹣cos$\frac{\theta }{2}$，则$\frac{\theta }{2}$是（　　）

“小时候，责任是一张暖暖的小床，我在里头，父母在外头；长大后，责任是一块黑板，我在下头，老师在上头；后来呀，责任也是一张暖暖的小床，我在外头，女儿在里头。”这首诗告诉我们（　　）  

根的生长一方面要靠____细胞增加细胞的数量，一方面要靠____细胞的体积的增大．幼根的生长最快的部位是____，其中吸收水和无机盐的主要部位是____．