光敏电阻器的特性是()A.无光照时呈低阻状态,有光照时电阻值下降 B.无光照时呈低阻

题型:单项选择题

问题:

光敏电阻器的特性是()

A.无光照时呈低阻状态,有光照时电阻值下降

B.无光照时呈低阻状态,有光照时电阻值上升

C.无光照时呈高阻状态,有光照时电阻值上升

D.无光照时呈高阻状态,有光照时电阻值下降

考点:岩土工程基础知识第七章电子工程技术第七章电子工程技术题库
题型:单项选择题

阅读理解。

     To me, music is food and water.I can't live without it.I know this is not true for everybody.Many

people don't listen to music and they can get along quite well.But music is everywhere in our life.For

example, when you watch films or TV plays,do you find them interesting if there is no music?You

would find them boring.And when you are waiting for the train or the plane,you would like music

because it makes the time seem shorter.

     It is true that music is everywhere in our life.Some people like to sit by the sea and listen to the

sound of the sea.Some enjoy listening to the singing of birds.Those sounds are some kinds of music.  

So music has meaning for everyone in some way or other.Of course, it has special meaning for people

like me.We spend our lives playing or writing music.

     Someone said,"Though music a child goes into a world of beauty, learns to take care of others

and makes his mind and body strong."Music is an important part of our lives.

1.The passage tells us that the writer _______.

A. likes to sit by the sea            

B. is not interested in music

C. likes to travel by plane          

D. likes music very much

2.The word "boring" in the first paragraph means ______.

A. interesting            

B. not interesting

C. tiring                

D. foolish

3.Music is important to _______.

A. some people        

B. everyone      

C. nobody  

D. writers only

4.Listening to music can ______ when you are waiting for the train.

A. make time fly quickly  

B. help you save time

C. make time short      

D. make you feel time passes more quickly

5. Which of the following is true?

A. The writer likes to write music every day.

B. The writer becomes strong through music.

C. Most people like to listen to the sound of the sea. 

D. Music has some kind of meaning to everyone.

题型:单项选择题

幼淋巴细胞白血病(PLL)的免疫表型多为()

A.CD2阳性

B.CD33阳性

C.SmIgM阳性

D.CD14阳性

E.CD13阳性

题型:单项选择题

某外籍个2008年1月1日来华执教于境内的某大学,2008年1月26口离境,该外籍个人境内居住天数、境内工作天数分别为( )。

A.26天、25天

B.16天、26天

C.25天、26天

D.15天、24天

题型:单项选择题

在微机的硬件设备中,有一种设备在程序设计中既可以当作输入设备,也可以当作输出设备,这种设备是

A.绘图仪

B.扫描仪

C.手写笔

D.磁盘驱动器

题型:单项选择题

国际奥委会的最高权利机构是?()

A.国际奥委会运动员委员会

B.国际奥委会执行委员会

C.国际奥委会全会

D.奥林匹克代表大会

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