乘数理论是一把“双刃剑”,增加需求导致国民收入成倍地增加,减少需求同样将导致国民收入

题型:判断题

问题:

乘数理论是一把“双刃剑”,增加需求导致国民收入成倍地增加,减少需求同样将导致国民收入成倍地减少。

考点:中级统计师产品市场和货币市场的均衡与国民收入的决定产品市场和货币市场的均衡与国民收入的决定题库
题型:判断题

不利于铁吸收的因素是()

A.维生素C

B.肉因子

C.胃酸

D.维生素B

E.膳食纤维

题型:判断题

It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves

Must be protected so that they will not disappear from the wilderndss(荒野)

For Killing Wolves

In Alaska,the wolf almost disappeared a few years ago,because hunters were killing hundreds

0f them forsport .However.1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur.So the woIf population has greatly increased. Now there are so many wolves that they are destroying their own food supply.

A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for

food.Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life.When the deer can’t find enough food,they die.

If the wolves continue to kill large numbers of deer,their prey(猎物)will disappear some

day.And the wolves will.too.So we must change the cycle of life in the wilderness to balance the

ecology.If we killed more wolves,we would save them and their prey from dying out.We’d also

save some farm animals.

In another northern state,wolves attack cows and chickens for food.Farmers want the

government to send biologists to study the problem.They believe it necessary to kill wolves in some areas and to protect them in places where there is a small woIf population.

Against Killing Wolves

If you had lived long ago,you would have heard many different stories about the dangerous

wolf.According to most stories,hungry wolves often kill people for food.Even today,the stories of the“big bad woIf'"will not disappear.

But the fact is wolves are afraid of people.and they seldom travel in areas where there is a

human smell.When wolves eat other animals,they usually kill the very young.or the sick and

injured .The strongest survive .No kind of animal would have survived through the centuries if the

weak members had lived.And has always been a law of nature

Although some people say it is good sense to kill wolves,we say it is nonsense!Researchers

have found wolves and their prey living in balance.The wolves keep the deer population from

becoming too large,and that keeps a balance in the wilderness plant life.

The real problem is that the areas where wolves can live are being used bv people.Even if

wilderness land is not used directly for human needs.the wolves can’t always find enough food .So they travel to the nearest source,which is often a farm.Then there is danger.The“big bad wolf”has arrived! And everyone knows what happens next.

1.According to the passage,some people in North America favor killing wolves for all the following reasons EXCET that_____________.

A.there are too many wolves                  B.they kill large numbers deer

C.they attack cows and chickens for food        D.they destroy the wilderness plant life

2.Some people are against killing wolves because____________.

A.wolves help to keep the ecological balance in the wildemess

B.there is too small a wolf population in the wilderness

C.there are too many deer in the wilderness

D.wolves are afraid of people and never attack people

3.According to those against killing wolves,when wolves eat other animals,____________.

A.they never eat strong and healthy ones

B.they always go against the law of nature

C.they might help this kind of animals survive in nature

D.they disturb the ecological balance in the wilderness

4.The last sentence“And everyone knows what happens next”implies that in such cases____________.

A.farm animals will be in danger and have to be shipped away

B.woIves will kill people and people will in turn kill them

C.wolves wilI find enough food sources on famls

D.people will leave the areas where wolves can live

题型:判断题

“竹林七贤”接受了()的思想。

A、儒家

B、墨家

C、法家

D、道家

题型:判断题

以下选项中,哪项是自旋回波SE序列中去相位的扫描

A.180°脉冲激励后
B.90°脉冲激励时
C.180°脉冲激励时
D.纵向磁场的信号差别
E.磁场不均匀所致的相位差别

题型:判断题

患儿,男,3岁。出现易渴多饮,夜尿增多,复出现遗尿。食量增加反而消瘦。反复患呼吸道感染。查体:皮下脂肪减少。肺部检查正常,其他无异常。

为明确诊断应进一步检查()

A.尿常规

B.便常规

C.血糖

D.血常规

E.血白细胞分类

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