患者,男,30岁。肛门部有物反复脱出近10年。检查:脱出物呈圆锥状,长约7cm,上可

题型:单项选择题

问题:

患者,男,30岁。肛门部有物反复脱出近10年。检查:脱出物呈圆锥状,长约7cm,上可见沟纹。其诊断是()。

A.混合痔

B.内痔三期

C.一度直肠脱垂

D.二度直肠脱垂

E.三度直肠脱垂

考点:中医骨伤科(医学高级)中医外科中医外科题库
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若|x+y-3|+
2x-y
=0,则x-y的值为(  )
A.-1B.1C.3D.-3
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不属于郑州商品交易所上市的期货品种是( )。

A.棕榈油期货

B.棉花期货

C.白糖期货

D.菜籽油期货

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下列法官不需要免除其职务的是( )。

A.王法官才45岁,工作极为认真,业务能力强,但今年积劳成疾,生病住院,医生说需要调养,长期不能工作

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腻子发生裂纹,脱掉和起泡的原因是什么,如何防止?

题型:单项选择题

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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