已知tanα=-2.(Ⅰ)求sinα+2cosα5cosα-sinα的值;(Ⅱ)

题型:解答题

问题:

已知tanα=-2.
(Ⅰ)求
sinα+2cosα
5cosα-sinα
的值;      
(Ⅱ)求2sinαcosα+cos2α的值.
考点:同角三角函数的基本关系式
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坏死组织经腐败菌作用后常可发生()。

A.脓肿

B.空洞

C.梗死

D.坏疽

E.栓塞

题型:解答题

下列关于成本差异计算的表达式中,不正确的是()。

A.材料数量差异=(实际材料用量-实际产量×单位标准用量)×标准价格

B.直接人工效率差异=(实际工时-标准工时)×标准工资率

C.变动制造费用效率差异=(实际工时-标准工时)×变动制造费用标准分配率

D.固定制造费用效率差异=(实际工时-预算产量标准工时)×固定制造费用标准分配率

题型:解答题

You should be well aware _____the fact that most interviewers have rich experience because    they are in ________position in their companies.

A.of…older

B.on…younger

C.on…junior

D.of…senior

题型:解答题

属于为贷款客户提供的短信服务为()。

A、贷款结息提前提醒

B、贷款扣息不足催收

C、贷款到期提前提醒

D、贷款逾期催收

题型:解答题

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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