问题
选择题
如果a，b表示两个实数，那么下列命题正确的是（ ）
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答案
A错误，例如a=3，b=-3时不成立；
B错误，例如a=3，b=-3时不成立；
C错误，a、b为负数时不成立；
D正确；
故选D．
搜题请搜索小程序“爱下问搜题”
如果a，b表示两个实数，那么下列命题正确的是（ ）
|
A错误，例如a=3，b=-3时不成立；
B错误，例如a=3，b=-3时不成立；
C错误，a、b为负数时不成立；
D正确；
故选D．
| 任务型阅读：下面是三家电影院星期五的电影海报(Film Poster)。请仔细阅读，然后简要回答问题。 | |||
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| 1. What film can Miss Smith go to see if she is free after 9:05 p.m.? ________________________________. | |||
| 2. Jack and his twenty other classmates are all twelve years old. They have only 100 dollars. Can they go to see the film Titanic? _________________________________. | |||
| 3. If Mrs. White goes to see the film Out of Africa with her husband and son Tom (eleven years old), how much should she pay? _________________________________. | |||
| 4. If a man wants to see the film Titanic, what telephone number should he call? _________________________________. | |||
5. There are fifty-five students in Jack’s class. If all the students in Jack’s class go to see the film Harry Potter, how much should they pay together? ________________________. |