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问题 多项选择题

单母线接线方式，若母线侧隔离开关发热，应（）。

A.减轻负荷

B.旁路代断路器运行

C.若无旁路，最好将线路停电

D.立即将该隔离开关所在母线停役处理

答案

参考答案：A, B, C

完形填空
完型填空。
    Water costs money. In some places water is hard   1  . What   2   when a town has these problems? A
small town in California found a happy answer. 　　
    Very   3   rain ever fell there. The town had no water   4  . The water it used was   5   from a river 300
miles away. As more people   6   live in the town, more water was needed. Now water has to be brought in
from 600 miles away. All these cost a lot of money.　　
    The town   7   a plan. It found ways to clean its "dirty" water. Once the cleaned water was reused   8   
many ways. Five man-made lakes were built. Here people could swim and fish and go   9  . They could have
picnics in their new parks. Farmers had more water for their crops. New factories can be built,now that they
have the promise of enough water. 　　
    In most places, water is used and thrown  10 . The town that saved its water has saved the town!
( )1. A. supplying   
( )2. A. happens    
( )3. A. little      
( )4. A. of itself   
( )5. A. fetch      
( )6. A. come to     
( )7. A. put        
( )8. A. for         
( )9. A. boating     
( )10. A. off         		B. getting    
B. happening   
B. a little   
B. of its own    
B. take        
B. came to     
B. made       
B. by         
B. to boat    
B. of          		C. to get        
C. is happened    
C. few          
C. for its own   
C. brought in    
C. coming to    
C. supply       
C. at          
C. to boating   
C. away         		D. to supply    
D. happened     
D. a few        
D. itself       
D. guided       
D. came for                             
D. noticed      
D. in           
D. on boating   
D. out of       
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单项选择题

胰岛素由何种细胞所分泌（）。

A.A细胞

B.B细胞

C.D细胞

D.PP细胞

E.D1细胞
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