UNIX是最普遍使用的操作系统之一,下列说法正确的是( )。A.UNIX系统的用

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问题:

UNIX是最普遍使用的操作系统之一,下列说法正确的是( )。

A.UNIX系统的用户进程数目在逻辑上不受任何限制,有较高运行效率

B.UNIX系统大部分采用C语言编写,易读易修改,但速度不如汇编系统,所以现在主流操作系统都采用汇编语言书写

C.提供了精心挑选的系统调用,系统地实现紧凑,简洁而优美

D.提供了多种通信机制如管道通信,软中断通信,消息共事存储器通信等

考点:计算机等级考试PC技术计算机三级(PC技术)4
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患者,男性,62岁,脑卒中后2个月,左侧偏瘫,左上肢屈肌痉挛,左下肢伸肌痉挛,左侧偏身感觉减退,为改善痉挛应采用的正常治疗方法是()

A.调制中频电疗法,部位左上肢届肌、左下肢伸肌

B.调制中频电疗法,部位左上肢伸肌、左下肢屈肌

C.等幅中频电疗法,部位左上肢屈肌、左下肢伸肌

D.等幅中频电疗法,部位左上肢屈肌、左下肢屈肌

E.等幅中频电疗法,部位左上肢伸肌、左下肢屈肌

题型:单项选择题

下列财产中,不得抵押的财产是( )。

A.抵押人依法有权处分的国有土地使用权和(或)房屋

B.抵押人所有的房屋和其他地上定着物

C.土地所有权

D.抵押人依法有权处分的国有交通运输下具

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阅读理解。

     When we ask students what they want to be, they often talk about unusual jobs, things like teachers

and doctors. But if you think about it, many people don't plan to do their jobs. They just start doing

them by accident. We have talked to two people with unusual jobs.

     Emily is a dentist (牙医) but she doesn't work with people. She works with horses. After university

she took care of animal's health for several years, but she noticed that there were few people who could

help horses' teeth. She decided to go to college and study again. Then she had to buy special tools, but

she is never out of work. She's always very busy taking care of horses' teeth. "I couldn't be a dentist for

people now," Emily said, "because I really enjoy working with horses."

     As soon as David could read, he read books about robots, but the robots he built today don't look

like the strange robot people in his books. He builds robots for industry. Early one morning he made up

his mind to study maths, science and computers so that he could break into the world of robot engineering. "Some of the maths is very difficult," says David, "but you must study maths to be an engineer." Fortunately he got top marks in all his math exams.

1. Emily doesn't want to be a dentist because __________.

A. the pay is low

B. she has to buy special tools

C. she will be out of work    

D. she likes working with horses

2. To become a robot engineer, David __________.

A. need to worry

B. bought a lot of robots  

C. had to study hard  

D. didn't have to go to college

3. David got top marks in all his maths exams, although __________.

A. maths was not easy to study

B. he had to study maths to be an engineer

C. he could break into the world of robot engineering

D. he made up his mind to study maths, science and computers

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高炉湿式除尘的方法有()、洗涤塔。

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财务会计报告由哪几部分组成?

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