问题 单项选择题 A1/A2型题

流行病学的研究可分为()。

A.描述性研究、分析性研究和数学模型研究

B.观察性研究、实验性研究和数学模型研究

C.描述性研究、观察性研究和分析性研究

D.观察性研究、描述性研究和实验性研究

E.观察性研究、分析性研究和数学模型研究

答案

参考答案:B

阅读理解

阅读理解。

     It was a Saturday afternoon. The weather was sunny and very hot; nobody wanted to stay at home.

Timmy decided to go swimming in the river. His little brother, Bob, wanted to go with him. "Take him

with you, Timmy," said their father, " and you must look after him well."

     When they got to the river, they saw a lot of people swimming in it. Some people had great fun playing

in the water. Timmy told Bob to play on the bank (岸上), and then he jumped into the water. About an

hour later, Timmy swam back to the bank with a fish in his hand. Bob was very happy. He found a bottle

and put the fish into it. Then they went home.

     Bob didn't do anything else that evening. He just watched the fish in his own room. Suddenly Timmy

heard Bob crying in the room. He ran to him and asked, "What's wrong with you, Bob?" "The fish is dead(死的)." Bob said. "I thought it was tired, so I took it out of the bottle and put is on the chair. I only

wanted it have a good rest."

It was _____ that day.

A. sunny and windy  

B. windy and hot

C. sunny and hot  

D. humid and hot

2. Timmy went swimming with _____.

A. his father  

B. his little brother  

C. his friend  

D. his sister

3. Bob played _____.

A. with the water  

B. in the water  

C. on the bank  

D. at home

4. Timmy and Bob put _____ in the bottle and went home.

A. two fishes  

B. a fish  

C. a dog  

D. a chicken

5. The fish was dead because _____.

A. Bob took it out of the bottle and put it on the chair

B. Timmy killed it

C. Bob put it into the water

D. the fish was too tired

多项选择题