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问题 单项选择题

女性，24岁，突然出现尿频尿痛进而发烧，尿检查：尿蛋白(+)，红细胞5～7个/HP，白细胞20～30个/HP，诊断为急性肾盂肾炎，感染途径考虑【 】

A．血行感染

B．逆行感染

C．淋巴道感染

D．直接感染

E．以上都不是

答案

参考答案：B

选择题

下面关于DNA分子结构的叙述错误的是[     ]

A．每个DNA分子中一般都含有四种脱氧核苷酸

B．每个脱氧核糖上均连着一个磷酸基和一个碱基

C．双链DNA分子中的一段，若含有40个腺嘌呤，就一定会同时含有40个胸腺嘧啶

D．每个DNA分子中，都是碱基数=磷酸数=脱氧核苷酸数=脱氧核糖数

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Dear Mum,
     I am happy here. I have  1  new friends. They are Jill and Bill. Jill is twelve. She comes  2   the USA. Bill
is twelve, too. He is  3 .  4  are polite and helpful. We are all good friends.
     After school, we often (经常) go to ABC park. The park is  5   the left of my school. It's not big  6  it's
clean. The park is very  7  . There are  8   trees and flowers in it. In the middle of the park,  9  is a playground.
We often  10    football there. Best wishes.
                                                                                                                                        Yours,
                                                                                                                                        David
( )1. A. three  
( )2. A. of     
( )3. A. England
( )4. A. We     
( )5. A. on     
( )6. A. and    
( )7. A. small  
( )8. A. a lot  
( )9. A. it     
( )10. A. watch  		B. two      
B. for      
B. an English
B. They     
B. at       
B. but      
B. big      
B. any      
B. this     
B. play     
C. one      
C. from     
C. English  
C. He       
C. beside   
C. or       
C. beautiful                          
C. many     
C. there    
C. make     
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