Price-elastic demand 有价格弹性的需求(或有弹性的需求)

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问题:

Price-elastic demand 有价格弹性的需求(或有弹性的需求)

考点:经济学经济学题库
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小芳一般步长0.39米,她穿过球场要走92步,球场的长度大约是______米.

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下列因式分解正确的是(  )

A.4-x2+3x=(2-x)(2+x)+3x

B.-x2+3x+4=-(x+4)(x-1)

C.1-2x+x2=(1-x)2

D.x2y-xy+x3y=x(xy-y+x2y)

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分子间间隙最小的是()。

A、液体

B、气体

C、固体

D、蒸汽

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为了能自动放大或缩小图像框中的图形以与图像框的大小相适应,必须把该图片框的Stretch属性设置为______。

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Attempts to understand the relationship between social behavior and health have their origin in history. Dubos (1969) suggested that primitive humans were closer to the animals (1) they, too, relied’upon their instincts to stay healthy. Yet some primitive humans (2) a cause and effect relationship between doing certain things and alleviating (3) of a disease or (4) the condition of a wound. (5) there was so much that primitive humans did not (6) the functioning of the body, magic became an integral component ofthe beliefs about the causes and cures of heath (7) Therefore it is not (8) that early humans thought that illness was caused (9) evil spirit. Primitive medicines made from vegetables or animals were invariably used in combination with some form of ritual to (10) harmful spirit from a diseased body.

One of the. earliest (11) in the Western world to formulate principles of health care based upon rational thought and (12) of supernatural phenomena is found in the work of the Greek physician Hippocrates. The writing (13) to him has provided a number of principles underiying modern medical practice. One of his most famous (14) , the Hippocratic Oath, is the foundation of contemporary medical ethics.

Hippocrates also argued that medical knowledge should be derived from a (15) of the natural science and the logic of cause and effect relationships. In this (16) thesis, On Air, Water, and Places, Hippocrates pointed out that human well-being is (17) by the totality of environmental (18) : living habits or lifestyle, climate, geography of the land, and the quality of air, and food. (19) enough, concerns about our health and the quality of air, water, and places are (20) very much written in twentieth century.

10()

A.discharge

B.exclude

C.dismiss

D.expel

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