9. Send whatever you find to the hospital to help ...

8. She might have been hit by a car ...

7. As with most diseases and disasters, the young suffer

　　 the most.

6. If I were to live long enough to have a job, I would ...

5. Many hospital recommend that we use the letters ...

4. If I had known more about giving first aid, I could

　　 have helped them.

3. The most important thing to keep ... is to stay calm.

2. I wish that she were here with me and that we weren't

　　 sick.

1. I can became infected with HIV by swinmaing ...

20．(2000上海文、理)在二项式的展开式中，系数是小的项的系数为　　 　　　。

(结果用数值表示)

历届高考中的“排列与组合”试题精选(自我检测一)