ADSL传输的信道类型分为()和()。
参考答案:快速信道;交织信道
-- Alice, have you heard that the grocery store down the street was ____, and nearly all the things there were stolen?
--- God! Really? That’s horrible!
A.broken down
B.broken up
C.broken into
D.broken out
煤电钻综合保护装臵安装时,接线前应对装臵的绝缘再做1次测定,用500V兆欧表测量高低压侧绝缘电阻,应不低于()。
A、5MΩ
B、10MΩ
C、15MΩ