医疗卫生工作者整体素质的核心内容是（） A.专业技能素质和人文素质 B.医学道德素质

At last the poor man had to give up. He found __________ no use begging for more.

A．it

B．this

C．that

D．himself

动脉瓣是

A．心房和心室之间的瓣膜

B．动脉内的瓣膜

C．动脉和静脉之间的瓣膜

D．心室和动脉之间的瓣膜

患者，男性，40岁。发现右眼睑外上方包块2月，不伴眼痛、复视。检查：双眼视力1．0，右眼球向鼻下方突出，突出度右眼14mm，向颞上方转动受限。右眼睑外上方可触及实质性包块，无压痛。右眼球结膜轻度水肿充血，角膜透明，前房深度正常，晶状体透明，眼底检查未见异常。

本患者最可能的诊断是（）

A.多形性腺瘤

B.急性泪腺炎

C.炎性假瘤

D.Graves眼病

E.泪腺囊样腺瘤

根据房产税法律制度的有关规定，下列各项中，不属于房产税纳税人的是( )。

A．城区房产使用人 B．城区房产代管人
C．城区房屋所有人 D．城区房屋出典人

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.