户内布线采用金属导管、绝缘阻燃导管进行暗敷设时，金属导管（）。
A.应与墙面绝缘
B.可以与墙面绝缘
C.可以接地
D.应可靠接地
参考答案：D
A．固态
B．液态
C．固液共存状态
D．上述情况都有可能
Which of the following could increase the current ratio()
A. Buying the equipment on credit.
B. Buying the stock on account.
C. Selling marketable securities for cash.
