![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
[单选题]
电接点水位计的电极在使用前必须测量绝缘电阻值,绝缘电阻值的数值应大于()
A.20MΩ
B.50MΩ
C.100MΩ
D.150MΩ
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.20MΩ
B.50MΩ
C.100MΩ
D.150MΩ
第1题
A.20MΩ
B.50MΩ
C.100MΩ
D.150MΩ
第6题
第8题
A.500~800MΩ
B.800~1000MΩ
C.800~1200MΩ
D.1000~1500MΩ
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!