中 * * 党党内第一大法是（）。

当直流系统两极均运行于双极联合功率控制方式时，将最大限度地保持（）。

A.两极功率平衡

B.两极电压平衡

C.两极电流平衡

D.两极换流器触发角/关断角相等

关于加速性损伤的描述错误的是

A．打击部位的冲击点伤

B．暴力打击后头部由静止转为运动

C．暴力作用对侧的对冲性损伤

D．打击部位的冲击点伤损伤重

E．头部由运动转为静止

阅读理解。

     According to the United States government, people are classified as homeless if they have no place to stay

and no expectation of finding a place for the next thirty days. Although technically accurate, that is an

impersonal assessment of an enormous and very human problem.

     The homeless population represents all of us Americans. It includes men and women, the elderly, children,

and infants. Its members are from all ethnic groups. What they have in common is poverty.

     Currently in the U S, thirty-nine million people live in poverty. When money is really tight, paying the rent

or buying food often becomes a choice. Government assistance in the form of food stamps does help but, as

one homeless man explains, you can't pay the rent with food stamps.

     With no money for rent, the streets and homeless shelters become the alternative.

     Although men constitute the largest group within the homeless population, homeless women with children

are rapidly joining them. In fact, one quarter of the homeless people in the US are teenagers and young children. 

     People may become homeless for numerous reasons. However, there are certain factors that many of these

individuals have in common. They include a lack of adequate education and job skills. A majority of the teenagers

and adults have not completed high school. The abuse of alcohol and drugs is also a common factor. One third

of the adult homeless population abuses alcohol. While one quarter of the same group uses drugs.

     Some members of this population suffer mental health problems. Within the past several years many

institutions for the mentally ill have been closed and their patients sent "home". Unfortunately, a number of those

people have no home to go to and they are unable to adequately look after themselves.

     Job loss in today's economy has also become a real factor in the loss of people's homes. The breakup of

families through abandonment and divorce are also contributing factors, particularly when there are children

involved. The parent who is left to care for the kids with inadequate income may be forced to depend on the

homeless shelters to put a roof over their heads.

1. The writer thinks that the US government's definition for the homeless reveals _____.

A. an insincere attitude toward the homeless

B. an unbearable attitude toward the homeless

C. an uncivilized attitude toward the homeless

D. an unsympathetic attitude toward the homeless

2. The US government helps the homeless by _____.

A. giving them homeless allowance

B. giving them food stamps

C. finding jobs for them

D. finding residence for them

3. People become homeless for all the following reasons EXCEPT _____.

A. the lack of adequate education

B. the abuse of alcohol and drugs

C. the closure of institutions for the mentally ill

D. the poor performance of economy

4. The breakup of families is likely to lead to homelessness because a parent with kids may _____.

A. lose his or her job in today's economy

B. be unable to look after the kids

C. not have enough income

D. find residence at a homeless shelter

螺纹磨床的校正尺，主要用来校正工件螺纹的（）误差。

A、中径

B、牙型

C、螺纹累距

曹雪芹在《红楼梦》中写道：“富贵又何为？襁褓之间父母违。展眼吊斜辉，湘江水逝楚云飞。”请问这是对谁写的判词？