问题
单项选择题
The vessel is at a speed of 16（）.
A.kilometers per hour
B.miles per hour
C.revolution per minute
D.meters per hour
答案
参考答案：B
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The vessel is at a speed of 16（）.
A.kilometers per hour
B.miles per hour
C.revolution per minute
D.meters per hour
参考答案：B
