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问题 选择题

神经系统的组成是（　　）

A．脑、脊髓、神经

B．大脑、小脑

C．脑神经、脊神经

D．垂体、脑

答案

人体的神经系统由脑、脊髓、和它们发出的神经组成，脑和脊髓是神经系统的中枢部分，它们组成了中枢神经，主管接收、分析、综合体内外环境传来的信息，然而发出指令，脑神经和脊髓神经组成了周围神经系统，能够传递信息．

故选：A

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 the passage, when a person has first lost a job, more often than not, he feels ______.

A．excited

B．isolated

C．shocked

D．depressed
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单项选择题

“永久变形”是下面哪个英文单词。（）

A.Elastic deformation

B.Permanent deformation；

C.plastical deformation
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