下列哪种移植不会发生排斥反应()A．心脏移植 B．断肢再植 C．同种异体肾移植 D．

复检抽样样本的组批规则、取样数量和测试项目时，必须按专业规范规定执行。( )

( )是调整平等主体之间的财产关系和人身关系的法律规范。

A．民法
B．合同法
C．担保法
D．行政法

读下面的人民币外汇牌价表，回答1—2题。

1．上述现象表明

A．外汇汇率升高，人民币币值下降

B．外汇汇率降低，人民币币值上升

C．外汇汇率升高，人民币币值上升

D．外汇汇率降低，人民币币值下降

2．上述变化可能带来的影响有 [ ]

①我国公民出国留学的成本降低 ②单位人民币的购买力下降 ③削弱我国出口商品的竞争力 ④海外对华投资增加

A．②③

B．①③ 　

C．①②③ 　

D．①②④

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.

《江上渔者》出自范仲淹的笔下。据诗中描述，江上的客人都偏爱哪种鱼？