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问题:

[单选] Functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off must be supervised by().

A . any certificated tankerman
B . the master of the vessel
C . the officer of the watch
D . the person designated as person in charge

针刺时要掌握一定的深度、角度以免发生危险,除()外,其他部位都不宜深刺。 眼区。 胸背部脏腑所居之处。 尿潴留患者小腹部。 肺气肿患者胸部。 四肢。 确定混凝土的配合比时水灰比的确定主要依据() 混凝土强度。 混凝土和易性要求。 混凝土强度和耐久性要求。 节约水泥。 药台工如何配制和添加浮选药剂? Gasoline tanks should be filled(). to the top to expel all vapors from the tanks。 to the top so the operator is certain how much fuel he has aboard。 with only sufficient fuel for the planned trip so excess gasoline is not carried。 to near the top with some space allowed for gasoline expansio。 在农电生产系统中,()是不用填写的,在提交后系统会自动生成。 Functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off must be supervised by().
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