单项选择题
（）locates in the aftmost part of a ship.
A.forecastle B.cargo hold C.rudder D.propeller
单项选择题 What is TRUE when operating in fog and other vessels are detected by radar?（）
单项选择题 What occurs when rising air cools the dew point?（）
单项选择题 （）means an observed situation where objective evidence indicates the non-fulfillment of a specified requirement.
