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问题 单项选择题

(1～5题共用备选答案)

右位心的心电图特点是

A．V1～V6导联R波逐渐减低，S波逐渐加深
B．右心房及右心室肥大
C．左心室及右心室肥大
D．aVF导联P-QRS-T波图形倒置
E．肢体导联低电压

答案

参考答案：A

完形填空
完形填空。
     In much of China, spring is usually very short.   It usually comes in February or March. Summer is often very   1   .
It   2   from May to July. The hottest month is July.   Autumn starts in August and goes on   3   October. The weather
can be quite warm in   4   .   Winter lasts from November to January,   and is very cold.   You need to wear lots of   5  
clothes. The best time to come to China is in   6   because in summer it is often too hot, and in winter it is too cold.
    The seasons of the year in England are unlike much of China and the USA．The weather in England   7   gets too
hot, or too cold. So you can see green grass all the year.   In  England spring is longer. It can last from late March to
May.
    The Australian seasons are the opposite.   8   is from December to February, and winter is in June, July and August.
So when it's spring in China, it is autumn in  9   . So Australians never have White Christmas because their Christmas
is in  10   .
( )1. A．warm            
( )2. A．stay            
( )3. A．from            
( )4. A．spring          
( )5. A．warm            
( )6. A．spring or summer
( )7. A．usually        
( )8. A．Winter          
( )9. A．England        
( )10.A．spring          		B．cold            
B．live            
B．to              
B．summer          
B．cool            
B．spring or autumn
B．never          
B．Spring          
B．USA            
B．summer          		C．hot            
C．have          
C．of            
C．autumn        
C．light          
C．summer or autumn
C．sometimes      
C．Autumn        
C．Australia      
C．autumn         		D．cool                
D．lasts              
D．in                  
D．winter              
D．beautiful          
D．autumn or winter    
D．often              
D．Summer              
D．Japan              
D．winter              
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填空题

某等腰三角形的两条边长分别为3cm和6cm，则它的周长为（    ）。
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