电磁干扰现象是由于什么引起的?()
A.一种至今仍未解释的现象
B.在拐角出超过了电缆的最大曲率半径
C.电缆中告诉传输的数据流
D.荧光灯、电动机等设备
参考答案:D
---It’s pouring now. Are we still going camping tomorrow?
----_____ it is good or bad, we will set off as planned.
A.However
B.Whether
C.Whatever
D.No matter
《国际船舶医疗指南》共分()章。
A.10
B.12
C.15
D.19