38.The ship has a speed of more than 14 ______ at 120 ______.

38.The ship has a speed of more than 14 ______ at 120 ______.

A.Miles, r.m.p

B.Miles, r.p.m.

C.Knots, r.p.m.

D.Knots, r.m.p.

正确答案是C