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问题 填空题

为了减少馈线的接地线的电感，要求接地线的弯曲角度大于（）度，曲率半径大于（）毫米 。

答案

参考答案：90；130

单项选择题 A1/A2型题

关于超声诊断仪中探头的主要作用描述，下列不正确的是（）

A.具有超声发射和接收作用

B.可将电能转换为机械能

C.可将机械能转换为电能

D.探头是超声诊断仪关键部件

E.测量皮肤温度
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补全对话，情景问答
从方框中A-G中选择五个合适的句子填入空白处，使对话完整通顺。
A. That's a good idea.                        
B. Would you like to go to the theatre.
C. Would you like to go there with me ?          
D. Where is it ?
E. What day is today ?                        
F. How many people are there ?
G. It's on Sunday afternoon.
A: Hello, Kate!                            
B: Hello, Bill.
A: __1___                 
B: Today is Friday.
A: There is a football match at Capital Stadium. __2___
B: A football match ?
A: Yes, it's between Dalian and Shanghai,      
B: __3___ Let's go there. When is it?
A: __4___
B: Let's go on that day. __5___ There is a magic show tonight.
A: Great. Let's go there first.
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