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问题 单项选择题

甲方与乙方签订货物买卖合同，合同价款为50000元，乙方向甲方交付9000元定金。但是在合同开始履行时，乙方反悔要求解除合同。甲方同意解除合同，但要求乙方承担违约责任。则甲方收取的9000元现金依法应当()

A、原数返还 

B、2倍返还 

C、不予返还 

D、4倍返还

答案

参考答案：C

解析：为证明合同的订立和保证合同的履行，当事人可以约定买受人向出卖人给付一定的定金作为担保。当买卖合同履行后，定金可以抵作部分价款或者收回;买卖合同未履行的，违约方应承担相应的责任。給付定金的一方不履行合同的，无权要求返还定金;收受定金的一方不履行合同的，应当双倍返还定金。本题中，甲方为收受定金方，乙方为给付定金方，乙方要求解除合同，无权要求返还定金，所以甲方收取的9000元现金不予返还

填空题


The central problem of economics is to satisfy the people’s and nation’s wants. The problem we are faced with is that our (1) , here identified as money, are (2) . The only way we can resolve our (3) is to make choices. After looking at our resources, we must examine our list of (4) and identify the things we need (5) , those we can postpone, and (6) we cannot afford. As individuals, we face the central problem involved in economics — deciding just how to allocate our limited resources to provide ourselves with the greatest (7) of our wants.
Nations face the same problem. As a country’s population (8) , the need for more goods and services grows (9) . Resources necessary to production may increase, but there are (10) enough resources to satisfy the total desires of a (11) . Whether the budget meeting is taking place in the family living-room, in the conference room of the corporation (12) of directors, or in the chamber of the House of Representatives in Washington, the basic problem still exists. We need to find (13) of allocating limited resources in order to satisfy unlimited wants.
A short time ago, economists divided goods into two categories, free and economic. The former, like air and water, were in (14) abundance that economists had no concern about (15) of scarcity and what to do about it. Today many of these "free goods" are in (16) very expensive to use. Pollution has made clean air and water expensive for producers who have to filter their waste products, for consumers who ultimately pay for the producers’ extra costs, and (17) tax-payers who pay for the government’s involvement in cleaning the environment.
In the 1990s, almost all goods are (18) . Only by effort and money can they be (19) in the form people wish.
Meeting the needs of people and the demands from resources available leads to the basic activity of production. In trying to (20) unlimited wants from limited economic goods, production leads to new problems in economics.
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单项选择题

（）在荷载作用下的变形较大，一般采用预压措施，预压重力相当于拟灌注的混凝土的重力。

A、满布式木支架

B、万能杆件拼装支架

C、贝雷桁片拼装支架

D、轻型钢支架
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