搜题请搜索小程序“爱下问搜题”
问题 单项选择题

用万用表R×1K档测量某二极管的直流电阻约为500Ω，则（）

A.红表棒相连的是正极

B.黑表棒接的是正极

C.不能判定，还应反向再测一次

答案

参考答案：C

解答题

一条直线长3厘米．______．（判断对错）
查看答案
填空题
根据框中的单词填空。
mature,  ring,  language,  keep fit,  camel,  in front of , skill,  worry about
1. Boys get             at a large age than girls.
2. He does poorly at school so his mother is             it.
3. There is a big tree             the house and we feel really cool because of it.
4. People use             to carry things to different places in the desert.
5. To             , he often goes to the gym to work out.
6. Li Ping can speak several foreign              besides English.
7. Do you know that there are five            on the flag of the Olympics?
查看答案