1．做功的两个重要因素是：有力作用在物体上且使物体在力的方向上______________，功的求解可利用求，但F为__________；也可以利用F－l图象来求：变力的功一般应用__________间接求解．

第二节 书面表达 (满分25分)

以吸烟有害健康为题写一篇短文，字数120左右，内容要求包括：

1. 现状：中国吸烟者约占将近一半，吸烟者越来越年轻，甚至有少数中学生也在抽烟。

2. 原因：有的认为是时髦(a kind of fashion)、有的认为是乐趣、有的认为可以提神(refresh oneself)。

3. 害处：吸烟有害健康，可导致多种疾病，是一种金钱的浪费，甚至会引起火灾。

4. 劝告不要吸烟。

第一节短文改错(共10小题；每小题1分，满分10分)

注意：1.每处错误及其修改均仅限一词；

2．只允许修改10处，多者(从十一处起)不计分。

It is reported, some needy students receive financial support from some kind people but never express our thanks. Personally, I think they are right. Though the helpers don’t expect any reward in return, but it’s necessary and good manner to say “Thank you “. Besides, it is a basic social skill express ourselves in the modern society. Maybe some of them did feel thankful. It is only because they are afraid of being looked down upon they remain silently. But I just want to say that being poor for the moment doesn’t mean you would be poor forever.