1. [单选题]互见中，两艘限于吃水的船舶相遇致有构成碰撞危险，应________。
A. 互为让路船
B. 两船负有同等的避让责任和义务
C. 根据两船的会遇局面确定两船间的避让责任和义务
D. 两船互不应妨碍
2. [单选题]在狭水道内，如不需要被追越船采取行动就能安全追越，则追越船________。
A. 可以直接追越
B. 一边鸣放追越声号一边追越
C. 鸣放追越声号征得被追越船同意后再进行追越
D. 鸣放警告信号后进行追越
3. [单选题]Compared to a constant pitch propeller, a controllable pitch propeller
A. more efficiently uses available engine power
B. operates at a lower efficiency at a fixed speed
C. produces the same torque at lower engine power
D. develops its rated power at a lower speed
