汽轮机热力试验大致包括哪些内容() A.试验项目和试验目的 B.试验时的热力系统和运

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问题:

汽轮机热力试验大致包括哪些内容()

A.试验项目和试验目的

B.试验时的热力系统和运行方式

C.测点布置、测量方法和所用的测试设备

D.试验负荷点的选择和保持负荷稳定的措施

考点:汽轮机检修汽轮机本体检修工(高级)汽轮机本体检修工(高级)题库
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个人一次性购买预付卡达到一定金额以上的,通过银行转账等非现金结算方式购买,不得使用现金。该金额为()元。

A.1000

B.2000

C.5000

D.50000

题型:多项选择题

在知觉周围环境时,知觉的对象和背景可以发生变化的现象是知觉的()

A.整体性

B.恒常性

C.理解性

D.选择性

E.变化性

题型:多项选择题

在结构化设计方法中,数据流图表达了问题中的数据流与加工间的关系,并且每一个______实际上对应一个处理模块。

题型:多项选择题

In 1959 the average American family paid $ 989 for a year’s supply of food. In 1972 the family paid $1,311.That was a price increase of nearly one-third. Every family has had this sort of experience. Everyone agrees that the cost of feeding a family has risen sharply. 41.______.

Many blame the farmers who produce the vegetables, fruit, meat, eggs, and cheese that stores offer for sale. According to the U. S. Department of Agriculture, the farmer’s share of the $1,311 spent by the family in 1972 was $ 521.This was 31 per cent more than the farmer had received in 1959.

But farmers claim that this increase was very small compared to the increase in their cost of living. 42.______These include truck drivers, meat packers, manufacturers of packages and other food containers, and the owners of stores where food is sold. They are among the "middlemen" who stand between the farmer and the people who buy and eat the food. Are middlemen the ones to blame for rising food prices

Of the $1,311 family food bill in 1972, middlement received $ 790, which was 33 percent more than they had received in 1959.It appears that the middlemen’s profit has increased more than farmer’s. 43.According to economists at the First National City Bank, the profit for meat packers and food stores amounted to less than one percent. During the same period all other manufacturers were making a profit of more than five percent. By comparison with other members of the economic system both farmers and middlemen have profited surprisingly little from the rise in food prices.

44.______The economists at First National City Bank have an answer to give housewives, but many people will not like it. These economists blame the housewife herself for the jump in food prices. They say that food costs more now because women don’t want to spend much time in the kitchen. Women prefer to buy food which has already been prepared before it reaches the market.

Vegetables and chicken cost more when they have been cut into pieces by someone other than the one who buys it. A family should expect to pay more when several "TV dinners" are taken home from the store. These are fully cooked meals, consisting of meat, vegetables, and sometimes dessert, all arranged on a metal dish. The dish is put into the oven and heated while the housewife is doing something else. Such a convenience costs money. 45.

Economists remind us that many modem housewives have jobs outside the home. They earn money that helps to pay the family food bills. The housewife naturally has less time and energy for cooking after a day’s work. She wants to buy many kinds of food that can be put on her family’s table easily and quickly. "If the housewife wants all of these, " the economists say, "that is her privilege, but she must be prepared to pay for the services of those who make her work easier. "

It appears that the answer to the question of rising prices is not a simple one. Producers, consumers, and middlemen all share the responsibility for the sharp rise in food costs.

[A] However, some economists believe that controls can have negative effects over a long period of time. In cities with rent control, the city government sets the maximum rent that a landlord can charge for an apartment.

[B] Farmers tend to blame others for the sharp rise in food prices. They particularly blame those who process the farm products after the products leave the farm.

[C] Thus, as economists point out: "Some of the basic reasons for widening food price spreads are easily traceable to the increasing use of convenience foods, which transfer much of the time and work of meal preparation from the kitchen to the food processor’s plant. "

[D] But some economists claim that the middleman’s actual profit was very low.

[E] Who then is actually responsible for the size of the bill a housewife must pay before she carries the food home from the store’

[F] But there is less agreement when reasons for the rise are being discussed. Who is really responsible

[G] Economists do not. agree on some of the predictions. They also do not agree on the value of different decisions. Some economists support a particular decision while others criticize it.

45

题型:多项选择题

在肩关节脱位中,表现为阳性的检查为()

A.托马征

B.“4”字征

C.搭肩试验

D.胸廓挤压试验

E.上臂外展试验

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