单项选择题

The weight of the liquid displaced by a vessel floating in sea water is equal to the ().

A.Weight
B.Total
C.Displaced
D.Reserve

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单项选择题

Your ship is dead in the water with the rudder amidships.As the right-handed screw starts to turn ahead，the bow will tend to go ().

A.To
C.To
D.Straight
E.As

单项选择题

TAT过敏试验皮内注射剂量（）

A.0.1mL含20～50U
B.0.1mL含0.075mg
C.0.1mL含250U
D.0.1mL含50μg
E.0.1mL含15U