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问题 问答题 简答题

简述人口对区域发展的影响。

答案

参考答案：

（1）区域劳动人口的数量影响区域自然资源开发利用的规模——生产规模的大小。

（2）区域人口的素质影响区域经济的发展水平和区域产业的构成状况。

（3）人口的迁移与分布影响区域生产的布局。

单项选择题

Losing a job or not being able to find one almost always brings unwelcome changes. If you’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed.
There may be good feelings too—it’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think—a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely.
Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’s up to you.

According to this passage, unemployment may ______.

A．cause people to lose touch with reality

B．completely destroy people’s fife patterns

C．lessen interaction with people

D．reduce people’s chances of promotion
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单项选择题

函数沿向量l=xi+yj的方向导数为（）。

A．-1

B．0

C．±1

D．1
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