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压器油温正常运行中的规定是什么？

答案

参考答案：

（1）运行中变压器的电压允许在额定值的±5％范围内变动，其输出容量不变，最高运行电压一般不应超过该运行分接额定电压的10５％。

（2）主变上层油温报警温度85℃，跳闸温度95℃；冷却装置线圈自启动温度70℃，冷却装置自停止上层油温度48℃；主变高低压侧绕组报警温度103℃，跳闸温度113℃。

（3）高厂变上层油温报警温度98℃，跳闸温度100℃；冷却装置自启动温度60℃，冷却装置自停止温度48℃；高厂变高压侧绕组报警温度98℃，跳闸温度108℃。

（4）启备变上层油温报警温度87℃，跳闸温度97℃；冷却装置自启动温度62℃，冷却装置自停止温度51℃；启备变高压侧绕组报警温度100℃，跳闸温度110℃。

多项选择题

皮肌炎患者出现咀嚼和吞咽困难时应给予下列何种饮食（）

A.流质饮食

B.少渣饮食

C.软食

D.特流

E.半流质饮食
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填空题


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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