3000年前的（），已有了辫髻、高髻等各种不同的发式。A.秦汉 B.殷商 C.夏朝

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.

下述哪种激素是由下丘脑产生的（）

A.黄体生成素

B.泌乳素

C.精氨酸加压素

D.促甲状腺素

E.黑色素细胞刺激素

关键组分的相挥发度越大，精馏过程所需的最少理论板数（）。

累计凭证

下列组合中，正确的是（）

A.视神经孔-Rhees’s

B.岩骨半轴位-ToWne’s

C.鼻窦瓦氏位-Water’s

D.鼻窦柯氏位-Caldweell’s

E.以上都是