请将图中透镜的光路补充完整．
凹透镜的折射光线折射光线反向延长通过焦点画，与入射光线衔接；
凸透镜的入射光线平行主光轴画，并与折射光线衔接；如图所示：
大量呕吐未加处理短期内常发生（）。
A.高渗性缺水
B.低渗性缺水
C.等渗性缺水
D.水中毒
E.水肿
用所给词的适当形式填空(15分)
1. Look! Whose ________ (Walkman) are these? Perhaps they are the twin’s.
2. Is there an American girl ___________ (study) in your class?
3. Amy wants to buy some presents for ________ (they).
4. Do you understand the ________(mean) of the new word? 5. Do you like to have cold ________ (drink)?
6.We usually go ________ ( shop )on Sundays. 7. Listen !Someone ________ ( knock )at the door.
8. Would you please show ________ ( I ) your pictures?
9. There ________ ( be ) a pair of shoes. 10. I have many different ________ ( kind ) of books.
11. It’s twelve o’clock now. The students ________ (have) their lunch. But yesterday they ________ (have) their lunch at eleven thirty.
12. Amy ________ (not watch) TV last night. She ________ (watch) TV now.
13. I like ________ (drink) coffee.
