单项选择题
The total leg load reactions on an independent leg，self-elevating unit include static and（）.
A.environmental loading
B.variable loading
C.fixed loading
D.basic loading
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A.loading
B.leaving
C.arriving
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The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge，and in a few minutes the pressure drops sharply. This could be a result of the（）.
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The term Loading and unloading Cargo means（）.
A.arranging cargo
B.shipping cargo
C.cargo handling
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