能够测得光缆衰减的仪表为（）
A.光功率计
B.万用表
C.分贝仪
参考答案：A
The wet weather will continue tomorrow, when a cold front________ to arrive.[ ]
A. will be expected
B. is expecting
C. expects
D. is expected
A．0、0
B．0、1
C．1、0
D．1、1
