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问题 单项选择题

下列命题或等式中，错误的是（）。

A.设f（x）在［-a，a］上连续且为偶函数，则

B.设f（x）在［-a，a］上连续且为奇函数，则

C.设f（x）在［-∞，∞］上连续且为周期函数，周期为T，则（a∈R）

D.

答案

参考答案：D

阅读理解

阅读理解。

     Tom is a student of a primary school. He has only four lessons every day but he goes to school six

days a week. The following is his school timetable.

                                                                      Timetable

       

1. Tom is a          .        

A. middle school student                

B. senior school student

C.  primary school student

2. How many subjects does Tom have at the school?   

A. Five              

B. Six            

C. Seven

3. Tom doesn't go to school on _       .      

A. Tuesday          

B. Sunday        

C. Saturday

4. How many lessons does Tom have a week?         

A. Twenty          

B. Six            

C. Twenty-four

5. Which subject doesn't Tom have at school?       

A. Spanish          

B. Chinese        

C. English
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单项选择题

客户部门在信贷业务发生后( )日内进行首次跟踪检查。

A．7
B．10
C．15
D．30
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