设每发生某种事件的概率P很小，如不改变这种情况，长此下去，这种事件几乎可以肯定是会发

下列病症均宜用灸法（）。

A.脾胃虚寒胃痛

B.鼻塞流清涕

C.癫痫

D.慢性泄泻

E.急性咽喉炎

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.

下列翻译有误的一项是   [ ]

A ．君子博学而日参省乎已，则知明而行无过矣：君子广泛学习，而且每天对自己检查反省，就能智慧明达，行为没有过错了。

B ．假舆马者，非利足也，而致千里：借助于车马的人，不是脚长得利于行走，却能到达千里远的地方。

C ．君子生非异也，善假于物也：君子的禀赋与普通人比没有差别， (只是) 他们善于借助外物。

D ．蚓无爪牙之利，筋骨之强：蚯蚓没有锋利的爪牙，没有强健的筋骨。

标准氢电极的相对平衡电位在什么温度下为零（）

A.常温

B.任何温度

C.零度以下

D.4℃

将40℃时硝酸钾溶液降温至20℃，有少量晶体析出，则下列说法错误的是[ ]

A、40℃时的溶液一定为饱和溶液

B、溶剂的质量没有改变

C、20℃时的溶液一定为饱和溶液

D、20℃时溶液中溶质的质量分数比40℃时小