一般来讲,舵力随舵角增大而增大,但实践证明,普通海船舵角超过()时,舵力反而开始减小。
A.25°;
B.35°;
C.45°;
D.90°。
参考答案:B
牙条错牙时可以强行将铲杆抽回。
It is strange that such a thing ________ in your school.[ ]
A. will happen
B. happens
C. should happen
D. happened