染色体是由_________和_________组成的。

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问题:

染色体是由_________和_________组成的。

考点:基因控制生物的性状
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下列对密度定义式ρ=m/V的几种理解中,正确的是(   )

A.密度与物体的质量成正比

B.密度与物体的体积成反比

C.密度与物体的体积成正比

D.密度是物质本身的一种特性,与物体的质量和体积无关

题型:读图填空题

系统停车,首先关闭(),停止向水池补水。

题型:读图填空题

下列关于清蛋白的描述,正确的是

A.具有运输胆红素的功能

B.分子结构中含氨基酸残基的个数为850个

C.分子结构中含二硫键的个数为13个

D.不能运输青霉素

E.在血液偏酸性时,其氨基和羧基以-NH2和-COO-形式存在

题型:读图填空题

到2020年,实现人才资源总量达到2亿人以上,人才资源占人力资源总量的比重提高到(),充分满足经济社会发展需要。

A.20%-25%

B.15%-20%

C.25%-30%

D.10%-15%

题型:读图填空题

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.

14()

A.attractions

B.subscriptions

C.contributions

D.functions

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