【单选题】— Can I pay the bill by check? — Sorry, sir. But it is the management rules of our hotel that payment _____ be made in cash. [ ]
【单选题】MAC地址表抖动现象是由于( )
A.
相同帧的副本在同一台交换机的两个不同端口被接收引起的
B.
不同帧的副本在同一台交换机的两个不同端口被接收引起的
C.
相同帧的副本在同一台交换机的同一端口被接收引起的
D.
不同帧的副本在同一台交换机的同一端口被接收引起的
【单选题】The computer can be paid for in ten monthly________ of 100 dollars.
【单选题】As far as I am ______, teaching children is something worthwhile. [ ]
【单选题】—Can I pay the bill by check? --- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.
【判断题】电动机启动后,注意听和观察电动机有无抖动现象及转向是否正确。