问题
单项选择题
A ship is side to be（）when the bow and stern rise and fall with the oncoming waves.
A.rolling
B.pitching
C.heaving
D.swaying
答案
参考答案：B
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A ship is side to be（）when the bow and stern rise and fall with the oncoming waves.
A.rolling
B.pitching
C.heaving
D.swaying
参考答案：B