问题 单项选择题

欲比较三种药物降低乙肝病人血液中GPT量的效果。已知病情和年龄对治疗效果有影响,将12名男性乙肝病患者按病情和年龄相近配成4组,每组3人;再把每一配伍组的3人随机分配到3个治疗组,每名患者测得治疗后的GPT下降量。

首选的统计检验方法是

A.多个样本率比较的χ2检验

B.4×3表χ2检验

C.完全随机设计资料的方差分析

D.配伍组设计资料的方差分析

E.配伍设计资料的秩和检验

答案

参考答案:D

阅读理解

阅读理解。

     Mr. Robinson never went to see a dentist, because he was afraid, but then his teeth began aching a

lot, and he had to see a dentist. The dentist did a lot of work in his mouth for a long time. On the last

day Mr. Robinson asked the dentist, "How much is all the work going to cost (花费)?"

     "Twenty-five dollars," said the dentist. But he didn't ask him for the money. After a month

Mr. Robinson phoned the dentist and said, "You haven't asked me for any money for your work." "Oh,"

the dentist answered, "I never ask a gentleman (绅士) for money." "Then how do you live?" Mr. Robinson

asked. "Most gentlemen pay me quickly, the dentist said, "but some don't. I wait for my money for two

months, and then I say, 'That man is not a gentleman,' and then I ask him for my money.

1. Mr. Robinson _____ until his teeth began aching a lot. 

A. wasn't afraid              

B. didn't see a dentist 

C. wanted to see a dentist      

D. went to see a dentist

2. _____ cost twenty-five dollars. 

A. The first day' work of the dentist  

B. The last day's work of the dentist 

C. Half the dentist's work          

D. All the dentist's work

3. When did Mr. Robinson phone the dentist? 

A. After he paid him.            

B. About thirty days later. 

C. After two months.            

D. About twenty days later.

4. The dentist said that he never asked _____ first. 

A. a woman for money            

B. the poor for money 

C. gentlemen for money          

D. people for much money

5. Mr. Robinson never went to see a dentist _____.

A. because he was afraid          

B. because he had no money

C. because he wasn't a gentleman  

D. because he didn't want to much money

多项选择题