问题 多项选择题

控制混杂偏倚可以采取下列哪些措施()

A.多因素分析方法

B.在选择好研究组之后,根据研究组各个个体的特征来选择对照组

C.在设计阶段,可采用限制研究对象特征的方法

D.资料分析阶段控制混杂因素采用分层分析的方法

E.尽量收集客观指标的资料

答案

参考答案:A, B, C, D

阅读理解

A

Several years ago,a television reporter was talking to three of the most important people in America. One was a very rich banker,another owned one of the largest companies in the world,and the third owned many buildings in the center of New York.

The reporter was talking to them about being important. “How do we know if someone is really important?” the reporter asked the banker.

The banker thought for a few moments and then said, “I think anybody who is invited to the White House to meet the President of the United States is really important. ”

The reporter then turned to the owner of the very large company. “Do you agree with that?” she asked.

The man shook his head, “No. I think the President invites a lot of people to the White House. You‘d only be important if while you were visiting the President, there was a telephone call from the president of another country,and the President of the US said he was too busy to answer it. ”

The reporter turned to the third man. “Do you think so?”

“No, I don‘t,” he said. “I don’t think that makes the visitor important. That makes the President important. ”

“Then what would make the visitor important?” the reporter and the other two men asked.

“Oh, I think if the visitor to the White House was talking to the President and the phone rang, and the President picked up the receiver, listened and then said, ‘It’s for you. ‘ ”

小题1:This story happened in _______.

A.England

B.America

C.Japan

D.Australia小题2:There are _______ in this passage.

A.three men and one woman

B.two men and two women

C.three women and one man

D.four women小题3:The following is true EXCEPT_________.

A.The banker thought any visitor to the White House was really important.

B.The owner of the very large company thought the visitor would be important if while he was visiting the President, the President would not answer any telephone call

C.The owner of many buildings thoughtthe visitor was really important if he was talking to the President and the President received a telephone call for the visitor.

D.the reporter knew the way to find out who was the most important.

问答题