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问题 单项选择题

下列选项中不属于计算机硬件系统五大组成部分的是______。

A．I/O设备

B．软件

C．运算器

D．控制器

答案

参考答案：B

解析： 计算机硬件系统是由运算器、控制器、存储器、输入设备和输出设备五大部分组成的。

填空题

吻合血管的组织移植是显微外科应用（）。
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单项选择题

Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams can tell us about ourselves. It’s like our (11) is talking to us.
Why are dreams (12) strange and hard to understand Some people think our brain uses (13) to talk to us. When we fly, swim, or fall down in our dreams, it has a (14) meaning. Lots of doctors help people (15) their dreams. They find that dreams tell us about our (16) and fears.
These days, many scientists (17) that dreams are very important. During the day, we have many (18) , and our brain receives a lot of information. When we dream, our brain (19) information that is not important, and puts the most important information into our (20) . As we learn more about the brain, we may find answers to our questions about dreams.

Ⅰ. 完形填空

/Close
阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

A．never

B．seldom

C．ever

D．often
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