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问题 补全对话，情景问答
Look, read and fill in the blanks. (看图补全对话)
1. What are you doing?
                                  

2. Is his birthday in July?
                                            
                     
3. Does he have any presents?
                                    
                            
4. What's the date today?
                                               
答案

1. I'm flying a kite.    

2. No, it isn't.  

3. Yes, he does.

4. It is June 15th.

选择题

The new stadium being built for the next Asian Games will be _____ the present one。

A．as three times big as

B．three times as big as

C．as big as three times

D．as big three times as
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问答题

设

，其中g(x)有二阶连续导数，且g(0)=1，g’(0)=-1．
(1) 求f’(x)；
(2) 讨论f’(x)在(-∞，+∞)上的连续性．
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