问题
单项选择题
下列有关外存储器的描述不正确的是
A．外存储器不能为CPU盲接访问，必须通过内存才能为CPU所使用
B．外存储器既是输入设备，又是输出没备
C．外存储器中所存储的信息，断电后信息也会随之丢失
D．扇区是磁盘存储信息的最小单位
答案
参考答案：C
解析：解析：外存储器中所存储的信息，断电后不会丢失，可存放需要永久保存的内容。
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下列有关外存储器的描述不正确的是
A．外存储器不能为CPU盲接访问，必须通过内存才能为CPU所使用
B．外存储器既是输入设备，又是输出没备
C．外存储器中所存储的信息，断电后信息也会随之丢失
D．扇区是磁盘存储信息的最小单位
参考答案：C
解析：解析：外存储器中所存储的信息，断电后不会丢失，可存放需要永久保存的内容。
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| Mr Newton was a famous scientist. He liked thinking of some 1 and for it he was often absent-minded (心不在焉的).One evening, when he 2 home at eight o'clock, his family were out. He waited for a long time, but none 3 .He became so worried about them that he couldn't eat. He wanted to eat nothing at all. Then he 4 his wife always took the children to the park on Wednesday and after that she would take them to the 5 .And it was Wednesday that day. Mr Newton was no longer worried. He began to feel 6 . He ate some bread, meat and tomatoes. After supper he fell 7 in the chair. Later on a little noise woke him up. He 8 that someone had entered the house. They slipped into(潜入)the sitting room, 9 turning on the lights. Jumping off the chair, he thought," 10 " Then he heard, "What are you doing here, Daddy?" Now he understood: they were his children. | ||||
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