搜题请搜索小程序“爱下问搜题”
问题 填空题

专用变压器中性点直接接地的低压系统宜采用（）接零保护系统。

答案

参考答案：TN-S

阅读理解
阅读理解。
LucyI like sports. I have ten tennis rackets, seven basketballs, tour volleyballs.
I play tennis every day and I am on the school tennis team (队).
MaryI have a great sports collection. I have five baseballs, six volleyballs, three ping-pong bats and
lots of ping-pong balls, oh, I also have two soccer balls, but I don't play sports. It's boring.
AliceI don't play sports, and I have no balls.
根据表格内容，选择正确答案。
1. Lucy and Mary have _______ volleyballs．
A. 4      
B. 6      
C. 10        
D. 12
2. Lucy plays _______ every day．
A. ping-pong      
B. tennis          
C. baseball      
D. soccer
3. Mary doesn’t have                
A. volleyballs    
B. ping-pong balls    
C. baseballs      
D．basketballs．
4.  _______ has/have two soccer balls．
A. Mary      
B. Lucy
C. Alice        
D. Mary and Alice
5. Alice _______
A. has no bails    
B. like sports
C. is in the school club
D. has a great collection
查看答案
问答题 简答题

客车电扇不摇头或摇头不圆滑的原因有哪些？
查看答案