遥信信息的传送方向为（）。
A.调度室←发电厂
B.发电厂←调度室
C.调度室←变电所
D.变电所←调度室
参考答案：A, C
He is quite strange, for everything he does is opposite to _____ is considered normal behavior.[ ]
A. whether
B. that
C. what
D. which
光学对比度的计算式是（）
A.A
B.B
C.C
D.D
E.E
