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问题 选择题
一道乘法算式中的积是24，如果两个因数都乘以3后，积是（　　）
A．24B．72C．216
答案

24×（3×3）

=24×9

=216

故选：C．

补全对话，情景问答
在B栏里找出A栏英语句子的合适答语。
                （A）                              
( )1. Where is the office?             
( )2. Is your school far from here?    
( )3. Do you have a map?               
( )4. Where is Tom playing?            
( )5. Excuse me.                      		         (B)                             
A. Yes. Here it is.            
B. It's near the library.     
C. No. It's near here.                                                                  
D. Yes?                        
E. He's playing in the park.
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单项选择题 A1型题

一般情况下固定桥固位力最好的固位体是（）

A.全冠

B.3/4冠

C.7/8冠

D.多面嵌体

E.套筒冠
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