9. be fast asleep　　 take a fast hold of 紧紧握住　　 My watch is 5 minutes fast .

8. fascinate　 吸引，迷住　 The children were fascinated by the toys in the shop window.

a fascinating voice　 迷人的嗓音　　 a fascinating story

dress in the latest fashion　 穿着时髦　　　 be in fashion　 在流行中　　 be out of fashion

follow the fashion 赶时髦

7. far more ,　 far too small ,　 by far the best ,　 better by far ,　　 how far 多远

far from　 远离　　　 Your answer is far from satisfactory.

6. sth be familiar to sb　 熟悉　　　 sb be familiar with sth

5. Leaves fall from the trees.　　 fall on 恰逢　　 fall asleep 入睡　　　 fall ill病了

fall behind 落后　　 fall in love with sb　　　 When night fell, they set out.

4. have faith in 相信　　 Have you any faith in what he says?

3. He failed to pass the exam.　　 He failed in the exam.　　 You failed me.　 你让我失望。　　　

My health is failing.= My health is declining.

Failure is the mother of success.　 失败是成功之母。　　　 As a writer he is a failure.

2. environmental factor　 环境因素　　　 an unknown factor　　　 a key factor　　　　　

1. in fact　 事实上　　　 as a matter of fact

4．设，试求的展开式中：

(1)所有项的系数和；

(2)所有偶次项的系数和及所有奇次项的系数和

答案：(1)；　

(2)所有偶次项的系数和为；

所有奇次项的系数和为