网剧《万万没想到》中，饰演“王大锤”的演员白客的原名是（）。
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职业道德修养的学习主要是为了获取形成良好的职业道德品质所必须的（）。
A. 理论
B. 技能
C. 学识
D. 知识
Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.
A. a subsequent temperature rise will cause the cargo to overflow
B. air pockets may cause the cargo to bubble out of the ullage hole
C. the increased viscosity of the product requires higher loading pressure which increases the chances of a spill
D. the tank valve may be stiff and a spill will occur before the valve can be closed
雷达电源应在船电电压变化（）的情况下，输出的中频电位变化应小于士5%。
A. 士10%
B. 土15%
C. 土20%
D. 士25%
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