單項選擇題The proper place（）the sling is made up is the square of the hatch.
A.which
B.where
C.when
D.how
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1.單項選擇題The port clearance for a ship should be granted（）the completion of loading or discharging in the port.
A.before
B.when
C.after
D.during
2.單項選擇題The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the（）.
A.maximum counter weight required
B.minimum horsepower required
C.hoist rope strength
D.allowable load
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