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【单选题】
Man and Nature The balance of nature is a delicate system of checks and counterchecks. Nature has its own way of checking the life and distribution of the different organisms and helping their growth. An epidemic may be considered nature's way of checking population growth. Man in his attempt to conquer nature and to utilize it to his advantage has interfered with the balance of nature, thereby creating problems of a complex nature. Nature's ways of maintaining the balance are intricate and not easily understood and man's application of his scientific knowledge and techniques has upset this balance so much that today, being aware of the disastrous consequences, he takes measures against them. No animal or plant can live in isolation, for different organisms are parts of a vast dynamic complex of living things. As no man or community is self-sufficient, no organism can live by itself. When man interferes with the interdependence and interrelationships of the different organisms, he is, in effect, upsetting their balanced relationships and his action can have a chain reaction. If we prevent fish eggs from being deposited in a pond, we are allowing an unchecked growth of weeds. The waterfowl which feeds on tadpoles will look for alternatives, thereby tending to upset these balanced relationships. It is important that for the preservation of beauty in nature the balance of nature is maintained. Man for his own survival has to make his peace with plant and animal life, the size and distribution of which he has interfered with. It is to be noted that in every plant and animal community there is a trend towards a balance between the different species. When each successive species is of the right number to maintain a constant population, a balance between the different species is maintained and this state is referred to as the climax stage. Man is forever upsetting the balance of the climax stage. He has added to the numbers of animals and plants that are useful to him. In the process he has unwittingly helped the increase in the number of insects and vermin and as a result he has to wage a relentless war against them. If man continues to interfere with the balance of nature, it is possible that some animals and birds may soon become extinct. The indiscriminate hunting of whales has reduced the number of some species almost to the verge of extinction and international laws have been drawn up to protect them. The balance of nature is to be maintained in order to prevent soil deterioration. Human intervention has altered the established relationship between the plants of an area and the soil of that area. Animals introduced by man, sheep and goats for example, have led to widespread soil deterioration. By cutting down trees or by practising unsuitable systems of agriculture, man destroys the crumb structure of soil, thereby making it susceptible to erosion. Soil erosion results in loss of soil fertility and maintaining soil fertility is considered the biggest problem facing mankind apart from the prevention of war. The increase in world population and the growth of civilisation have been the two major factors that have led man to cut down forests on an unprecedented scale and the erosion caused by the cutting down of huge areas of forests has resulted in floods on a scale hitherto unknown. Soil erosion can whittle away soil fertility and if adequate and effective measures are not taken it can become a menacing spectre tearing at the prosperity of many countries. Pollution, in its different forms, interferes with the balance of nature. Water pollution affects nature's balance in oceans, lakes and rivers. Man-made pollution of water is due to, municipal sewage, dumping by factories and the depositing of pesticides. Solid wastes can permeate the soil and pollute lakes and rivers. Man has to adopt the philosophy of thrift by conserving natural resource
A.
Y
B.
N
C.
NG
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【判断题】地面与隧道架空式悬挂都属于刚性接触悬挂。
A.
正确
B.
错误
【单选题】对胚胎期脑发育影响最为关键的激素是( )
A.
生长激素
B.
胰岛素
C.
甲状腺激素
D.
糖皮质激素
E.
人绒毛膜促性腺激素
【多选题】诉讼中可以申请法庭通知专家辅助人出庭,就鉴定人作出的鉴定意见提出意见的主体包括( )
A.
公诉人
B.
辩护人
C.
当事人
D.
诉讼代理人
【单选题】在发布商品时,下面哪个说法是正确的?
A.
为了争取多曝光,安全相同的商品,使用一口价形式多发布几次
B.
对于不同的商品,必须在商品的标题/描述/图片等方面体现商品的不同
C.
同一件商品,不同颜色,不同尺码分开发布
D.
为了争取多曝光,完全相同的商品,使用一口价形式发布,再使用拍卖形式发布
【单选题】在发布商品时,下面说法是正确的是( )。
A.
为了争取多曝光,完全相同的商品,使用一口价格形式多发布几次
B.
为了争取多曝光,完全相同的商品,使用一口价形式发布,再使用拍卖形式发布
C.
同一件商品,不同颜色,不同尺码分开发布
D.
对于不同的商品,必须在商品的标题/描述/图片等方面体现商品的不同
【多选题】适合无菌制剂一般区地面的建筑材料有( )
A.
无缝水泥面
B.
环氧面
C.
水磨石
D.
耐磨涂层
E.
无缝乙烯材料
【单选题】影响人胚胎脑发育的关键激素是( )
A.
胰岛素
B.
生长激素
C.
肾上激素
D.
甲状腺激素
【单选题】对胚胎期脑发育影响最为关键的激素是
A.
生长激素
B.
胰岛素
C.
甲状腺激素
D.
糖皮质激素
E.
人绒毛膜生长激素
【单选题】在淘宝网发布商品时,下面说法正确的是( )。
A.
为了争取多曝光,完全相同的商品,使用一口价形式发布,再使用拍卖形式发布
B.
为了争取多曝光,完全相同的商品,使用一口价形式多发布几次
C.
同一件商品,不同颜色,不同尺码分开发布
D.
对于不同的商品,必须在商品的标题/描述/图片等方面体现商品的不同
【单选题】影响人胚胎脑发育的关键激素是
A.
胰岛素
B.
生长激素
C.
肾上腺素
D.
甲状腺激素
E.
绒毛膜生长激素
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