A drift lead indicates that the vessel is dragging anchor when the line is（）. ["taut and leading forward","slack","leading out perpendicular to the centerline","leading under the hull"]
情报工作的原则不包括下面哪一项（）。 ["重视、重赏、亲密","上智为间","保密原则","机会原则"]
道德主要是通过社会舆论、人们内心的信念和习惯的力量，来评价和影响人们的各种活动。（）
A deepwell pump is a type of（）. ["screw pump","centrifugal pump","eductor","gear pum"]
依据华电集团《电力安全工作规程》（热力和机械部分）使用链条葫芦时应遵守哪些一般规定？
如何实施股票期权制？
