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【单选题】
Man and Nature The balance of nature is a delicate system of checks and counter - checks. 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 utilise 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 blanced 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 looss 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 t
A.
Y
B.
N
C.
NG
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【单选题】已知: int m=10; 在下列定义引用的语句中,正确的是( )。
A.
int &x=m;
B.
int y=&m;
C.
int &z;
D.
iny &t=&m;
【简答题】甲公司为一家上市公司,有关的资料如下 : (1) 2018 年 5 月 17 日,购入 A 上市公司股票 200 万股,每股 8 元 ( 含已宣告未发放的现金股利 1 元 ) ,另发生相关的交易费用 2 万元,增值税税额 0.12 万元,并将该股票划分为交易性金融资产。 (2)2018 年 7 月 20 日,甲公司收到包含在买价中的现金股利。 (3) 2018 年 8 月 1 日, A 公司宣告发...
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A.
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B.
碳酸氢钠用于治疗胃酸过多
C.
干冰用作制冷剂
D.
氢氧化钠固体用于干燥CO2
【单选题】The biggest computer company in Silicon Valley has laid off hundreds of people during the last few years.
A.
declined
B.
detached
C.
dismissed
D.
dispersed
【单选题】The most favorable business ecology in Silicon Valley is characterized by ______.
A.
its waste products of success.
B.
its abundance in constructive failures.
C.
its solid foundation for innovations.
D.
its laid-off dot-com programmers.
【简答题】仔细阅读:Could youreproduce Silicon Valley elsewhere, or is there something unique about it?Could youreproduce Silicon Valley elsewhere, or is there something unique about it? It wouldn’t besurprising if ...
【单选题】What makes Miami unfit to produce a Silicon Valley? 查看材料
A.
Lack of incentive for investment.
B.
Lack of the right kind of talents.
C.
Lack of government support.
D.
Lack of famous universities.
【单选题】在 普通水准测量 中,应 在水准尺上读 取 ( ) 位
A.
5
B.
3
C.
2
D.
4
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A.
用人单位未按照劳动合同约定提供劳动保护或者劳动条件的,劳动者不需要事先告知即可解除劳动合同
B.
对于劳动者不需事先告知即可解除劳动合同的,用人单位不需向劳动者支付经济补偿 D. 对于劳动者可以随时解除劳动合同的,用人单位需向劳动者支付经济补偿
C.
用人单位违章指挥、强令冒险作业危及劳动者人身安全的,劳动者可以随时通知解除劳动合同
D.
对于劳动者可以随时解除劳动合同的,用人单位需向劳动者支付经济补偿
【单选题】Can the Internet help patients jump the line at the doctor's office? The Silicon Valley Employers Forum, a sophisticated group of technology companies, is launching a pilot program to test online 'vir...
A.
rewarding their employees
B.
gratifying the local hospitals
C.
boosting worker productivity
D.
testing a sophisticated technology
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