商店出售下列形状的地砖：①正方形；②长方形；③正五边形；④正_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

商店出售下列形状的地砖：①正方形；②长方形；③正五边形；④正六边形；⑤正八边形．如果要求只选购其中一种地砖镶嵌平面，则可供选择的地砖有[ ]

A．1种

B．2种

C．3种

D．4种

答案

答案：C

改错题

短文改错。
     此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
     如有错误(每行只有一个错误)，则按下列情况改正：
     此行多一个词：把多余的词用斜线(＼)划掉，在该行右边横线上写出该词，并也用斜线划掉。
      此行缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。
     此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
     注意：原行没有错的不要改。

As is known to all that the Internet is playing
a more and more important part on our daily life.
On it, we can not only read news at home or abroad
but also get much information as possible. For instance,
we are often send e-mails or make telephone calls
to our families as well as our friends. However,
we can go to school on a net, read different
kind of books and even teach ourselves English. We
can also enjoy music, watching sports and play computer
games. We can even do shopping without left our homes.

1. _____
2. _____
3. _____
4. _____
5. _____
6. _____
7. _____
8. _____
9. _____
10. _____

单项选择题

为了保证CPU执行程序指令时能正确访问存储单元，需要将用户程序中的逻辑地址转换为运行时可由机器直接寻址的物理地址，这一过程称为

A．地址分配

B．地址计算

C．地址映射

D．地址查询