搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列有关镇咳药的叙述，哪一条不对（）。

A、磷酸苯丙哌林又称咳快好

B、镇咳药既能镇咳又能祛痰

C、枸橼酸喷托维林又称咳必清

D、氢嗅酸右美沙芬又称右甲吗喃

答案

参考答案：B

补全对话，情景问答
情景匹配。
( )1. What day is it?                  
( )2. What's wrong with you?          
( )3. What does Jim usually do?        
( )4. Does Mike run fast?              
( )5. Is Ben new here?                
( )6. Are you ready for supper?        
( )7. How do you feel now?            
( )8. Are you from England?            
( )9. Lift up your left leg.          
( )10. Do you like listening to music? 		A. He usually makes model planes.                     
B. No, I'm not.                  
C. No, he doesn't.                
D. All right.                    
E. I've got a fever.              
F. Not yet.                      
G. No, he isn't.                  
H. I feel thirsty.                
I. Yes, I do.                    
J. It's Friday.                  
查看答案
单项选择题

有些绕线型异步电动机装有炭刷短路装置，它的主要作用是（）

A.提高电动机运行的可靠性

B.提高电动机的启动转矩

C.提高电动机的功率因数

D.减少电动机的摩擦损耗
查看答案