题目内容

CPU的中文意义是________。

A. 控制器
B. 不间断电源
C. 算术逻辑部件
D. 中央处理器

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下列叙述中,正确的一条是________。

A. CPU能直接读取硬盘上的数据
B. CPU能直接与内存储器交换数据
CPU由存储器和控制器组成
D. CPU主要用来存储程序和数据

[音频]We all know that having friends is 1._______, but why do we2._ friendships with some people and not others? In some ways, the answer is 3. _: you become friends with someone because you have things in 4. . Maybe you both like the same5. team. Or perhaps you both love to play video games. Or maybe your 6. are similar: you’re a bit 7. __ and the other person is, too.

架空线路是由（）等主要元件组成的。

A. 导线
B. 电杆
C. 绝缘子
D. 金具

导线的常用材料有（）。

A. 铁
B. 铜
C. 铝
D. 钢