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问题 多项选择题

关于蒸气式双效溴化锂吸收式制冷机，下列说法正确的是______。

A．低压发生器中产生的冷剂蒸汽加热高压发生器中的稀溶液后，放出热量凝结成冷剂水

B．高压发生器中产生的冷剂蒸汽加热低压发生器中的稀溶液后，放出热量凝结成冷剂水

C．高压发生器由一只单独的高压筒组成，低压发生器、冷凝器和蒸发器、吸收器分置于另外两只简体内

D．低压发生器由一只单独的高压筒组成，高压发生器、冷凝器和蒸发器、吸收器分置于另外两只筒体内

答案

参考答案：B,C

完形填空
选择最佳答案填空。
     Ann is    1    English girl. She is fourteen. She is a    2   student. Her teacher is Miss White. Ann helps
her teacher to put    3    books and ruler on the desk.
     They have a new    4   . In it you can    5    40 desks and chairs. A blackboard, a clock and a map
are    6    the wall.
     There are some pens on the desks. The red    7    is Ann's, others are Kate's. Kate is Ann's    8    
friend. Kate isn't    9    here today. She is ill.
     Look at the clock. It's about four o'clock. It's time   10   to play games.
( )1. A. a            
( )2. A. middle school
( )3. A. my          
( )4. A. room        
( )5. A. look        
( )6. A. on          
( )7. A. pens        
( )8. A. fine        
( )9. A. /            
( )10. A. come        		B. an          
B. Middle School
B. your        
B. class        
B. look at      
B. in          
B. pencil      
B. good        
B. at          
B. to come      		C. the            
C. middle school's
C. his            
C. grade          
C. see            
C. at              
C. one            
C. nice            
C. on 
C. go            		D. /                
D. Middle School's
D. her              
D. classroom        
D. see at          
D. to              
D. ones            
D. right            
D. of              
D. to go            
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问答题 简答题

试述常用的装配方法有哪些？
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