实验操作要规范，否则会影响实验效果，甚至可能发生事故。如图所示的两种错误操作，都会引起试管破裂。

读“20世纪世界人口、资源、环境污染的相关示意图”，回答下题．

在2008年北京奥运会赛场上，作为2004年雅典奥运会首金获得者，杜丽只能胜不能败，重压下的她无法调整好自己的情绪，首金卫冕失败，沉静、乐观、爱笑的她在赛后痛哭失声。四天之后，杜丽及时调整好了心态，在女子射击50米步枪三种姿势的比赛中夺冠。

杜丽的经历说明了什么？

绿色开花植物要形成果实和种子，必须经过的两个必要生理过程（　　）

将右栏中合适的答句的序号填在左栏前的横线上。

①Where's John?____                     A. It's in October.

②Where are the flowers?____               B. Yes, it was.

③When's your birthday?____              C. The students.

④What would you like as a birthday present?____ D. Yes, it is.

⑤Was it there a moment ago?____           E. I'd like a CD walk-man.

⑥Who are very happy today?____            F. She's ill at home.

⑦How is your mother?____                G. It's the 20th of May.

⑧Is it in your bag?____                    H. He's in the study.

⑨What are they?____                    I. They'rein the vase.

⑩What's the date today?____              J. They're nice pictures.