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
