涡流探伤中，试样与探头式线圈之间距离变化所引起的电磁耦合的改变，称为（）效应.
参考答案：提离
He is ___ with the striking workers.
A．sympathy
B．synthetic
C．sympathetic
D．sympathize
—Could you let me know _______ yesterday?
—Because the traffic was heavy.[ ]
A. why you come late
B. why you came late
C. why did you come late
D. why do come late
