规定II类砂的含泥量按质量计所占比例应()。
A.<1.0%
B.<2.0%
C.<3.0%
D.<5.0%
参考答案:C
解析:
砂中含泥量和泥块含量规定表
— What do you think of the performance today?
— Great! _____but a musical genius could perform so successfully. [ ]
A. All
B. None
C. Anybody
D. Everybody
GPON技术中,OLT下行采用()技术进行数据下发。
A.广播
B.单播
C.链路复用
D.TDMA