HDLC协议是一种 (55) ,采用 (56) 标志作为帧定界符。
A.10000001
B.01111110
C.10101010
D.10101011
参考答案:B
Just use this room for the time being, and we'll offer you a bigger one _______ it becomes available.[ ]
A.for the moment
B.at the moment
C.the moment
D.every time
矿物分析试样一般通过120目筛网,即筛孔直径是()
A、0.100
B、0.125
C、0.071