搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列说法中( )是正确的。

A．半导体ROM 信息可读可写，且断电后仍能保持记忆

B．半导体ROM 是非易失性的，断电后仍然能保持记忆

C．半导体ROM 是非易失性的，断电后也不能保持记忆

D．EPROM 是可改写的，因而也是随机存储器的一种

答案

参考答案：B

解析：[分析] 半导体ROM是非易失性的，断电后仍然能保持记忆。

完形填空

Judy is a little girl. She lives with her parents in a big city. But on weekend(周末) they often go to the countryside to relax(放松). Her uncle lives there. There aren’t tall buildings, supermarkets or parks, but she can find many interesting things there. Her uncle’s house is quiet, 71.______ it isn't near the street. Judy sometimes(有时候) draws pictures in front of the house and sometimes goes to play with her cousin Betty. They like going to a river(河). 72. 它离他叔叔的家不远。It’s their favorite place. There they can go fishing. Judy and Betty sometimes eat out. They eat a lot, because they're hungry(饥饿的) after playing. 63. Judy and her parents go back home on Sunday afternoon. She hopes(希望) the next weekend can come soon.

阅读短文内容，完成下列任务。

任务一：在文中的空白处填入一个适当的单词，使上下文通顺连贯。

小题1:____________

任务二：英汉互译。

小题2:它离他叔叔的家不远。

____________________________________

小题3:Judy and her parents go back home on Sunday afternoon.

____________________________________

任务三：判断下列句子正(T)误(F)。

小题4:Judy lives in a big city with his uncle.

小题5:A river is close to Betty's house and there are fish in it.
查看答案
单项选择题

望远镜的视准轴是否水平，只能通过（）进行判断。

A.经验

B.三脚架

C.肉眼

D.水准器
查看答案