单选题拖船协助掉头时，为了便于控制船速，缩短掉头水域，最好在（）的情况下操纵。A顶流、流速不宜超过1节B顶流、流速不宜超过2节C顺流、流速不宜超过1节D顺流、流速不宜超过2节
单选题
拖船协助掉头时，为了便于控制船速，缩短掉头水域，最好在（）的情况下操纵。
A
顶流、流速不宜超过1节
B
顶流、流速不宜超过2节
C
顺流、流速不宜超过1节
D
顺流、流速不宜超过2节
参考解析
解析：
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