问题 单项选择题 A3/A4型题

为研究吸烟与肺癌的关系,采用配对方法调查了113对肺癌患者和健康对照的吸烟史,结果如下:

根据以上资料,肺癌与吸烟的联系是()

A.无统计学关联

B.有统计学关联

C.因果关联

D.偶然关联

E.样本量太小,无法判断

答案

参考答案:B

阅读理解

The United States economy has dipped into economic recession (经济衰退). This caused discomfort and hardship in every level of society; but for many of the nation’s poor, discomfort and hardship turned into misery (苦难).

An increase in homelessness is probably the worst result of a nation’s financial disaster. About 3 million Americans were homeless because of a lack of affordable housing. Experts suggest that a family should spend no more than 30 percent of its income on housing. In fact, in some families housing costs make up 50 percent or more. An unexpected event, such as losing work or illness, can quickly push a family into homelessness.

An article in Time magazine tells a story of one such family. A young couple and their three children rented a two-bedroom apartment for about $350 a month. They could hardly go on with the husband’s $920-a-month take-home pay; so when their rent was raised to $500 a month, they could no longer make ends meet.

Another woman was found dead on a street in Washington D.C., the capital, and she died at a bus-stop across the street from the US Department of Housing and Urban Development.

People become homeless for different reasons. Some may not be able to pay for housing, because they have lost their job and cannot find another place they can afford. Others have mental diseases, or are addicted to drugs or alcohol, many of whom do not live with their family. And what’s more, there are not enough centers for shelter as the government doesn’t pay enough attention to this social problem. 

People are making efforts to solve the problem. However, it will not be easy, because it is a personal and economical problem as well as a social problem.

小题1:The passage is mainly about __________ in the US.

A.ways of solving economic problems

B.homeless people being taken good care of

C.different reasons for economic recession

D.economic recession leading to social problems小题2:In the passage the author supported his view by __________.

A.presenting specific figures

B.giving examples

C.explaining in details

D.discussing different opinions小题3: One main result that economic recession has led to is __________

A.an increase of living costs

B.more and more deaths

C.an increase of homeless people

D.less centers for poor people小题4:How many reasons why people become homeless are listed in the passage?

A.2.

B.3.

C.4.

D.5.

单项选择题