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问题 判断题

M1432B型万能外圆磨床工作台运动速度的调节，是依靠改变节流阀的开口大小来实现的。( )

答案

参考答案：对

完形填空
完形填空。
     Look! This is a picture of my room. You can see some things in it.  1  alarm clock is on the desk. My
baseball is  2  the chair.  3  that on the sofa? It's my schoolbag.  4  is my bed? It's near (在……附近) the
desk. What are those? They are  5  plants. I like (喜欢) my room.
( )1. A. An    
( )2. A. in    
( )3. A. Where’s
( )4. A. What          
( )5. A. some  
B. A    
B. to   
B. What’s
B. Where             
B. any  
C. The     
C. under  
C. What are                                           
C. How                                                                            
C. a       
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不定项选择

如图所示为一个简单的报警器电路图，下列说法正确的要是

[ ]

A．S1，S2都合上时报警器发声

B．S1断开，S2合上时报警器发声

C．S1，S2都断开时报警器发声

D．S1闭合，S2断开时报警器发声
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