在产销量上升时，经营杠杆率（）.A、上升 B、下降 C、不变 D、成正比例变动

紫月公司与白阳公司于2006年3月18日签订了一份特种钢买卖合同，4月18日白阳公司按照合同的要求交付钢材之后，紫月公司一直没有交付货款。为了让紫月公司能尽快付款，5月18日白阳公司又与紫月公司经协商确定：紫月公司于2006年6月18日向白阳公司付清货款60万元。蓝星公司、黄斗公司分别与白阳公司签订保证合同，但未约定保证责任的范围和方式。银河公司以价值30万元的房屋为紫月公司向白阳公司设定抵押并办理了登记。请回答题。

下列关于紫月公司、蓝星公司、黄斗公司关系的表述何者正确( )

A．蓝星公司、黄斗公司的保证都为连带责任保证

B．蓝星公司、黄斗公司对紫月公司的全部债务承担保证责任，但彼此之间不负连带责任

C．若蓝星公司与黄斗公司事后约定各自担保紫月公司的30万元债务，该约定未经白阳公司的同意不能生效

D．若黄斗公司代紫月公司清偿了全部债务，应首先向紫月公司追偿，若紫月公司不能偿还，再要求蓝星公司分担责任

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

人参的适应证是（）

A.气虚欲脱、脉微欲绝的危重证候

B.肺气虚证

C.脾气虚证

D.热病气津两伤，身热口渴及消渴证

E.气血亏虚之心悸、失眠、健忘

2006年7月15日，A县的新新食品公司与B县的伟达农产品公司订立合同约定，由伟达公司以每公斤2元的价格向新新公司提供、50吨花生，合同签订后1个月内交货，交货地点为C县。合同中未订立仲裁条款。至2006年8月20号伟达公司仍未交货，新新公司在不得已的情况下另寻货源，向D县的样样红公司以每公斤2．2元的价格买下50吨花生。根据上述案情回答以下问题：

如果双方后来达成仲裁协议，仲裁委员会作出裁决，由伟达公司在仲裁裁决书生效后1个月内向新新公司赔偿经济损失5万元。但仲裁裁决书发生法律效力1个月后，伟达公司拒绝履行义务。新新公司可以向以下哪个机构申请执行

A．作出裁决的仲裁委员会

B．仲裁机构所在地的人民法院

C．B县人民法院

D．C县人民法院

某业主拟投资一综合大厦项目，通过公开招标的方式分别选择了甲公司和乙公司作为综合大厦的监理单位和施工单位，并分别签定了合同。为保证投资效益，业主与甲监理公司签订的监理委托合同规定：监理工作内容包括对综合大厦项目进行风险损失分析和施工监理。

施工单位在风险评估的基础上，针对不同的风险采用不同的风险对策。可供施工单位选择的风险对策有( )。

A．规避风险

B．评估风险

C．减轻风险

D．自留风险

E．转移风险