单项选择题
BHP stands for the（）of the main engine.
A.breadth dimension B.builder's name C.brake horsepower D.revolutions per minute
单项选择题 Before starting to hoist provisions，which should be checked?（）
单项选择题 Before operating a non-oceangoing ship greater than 100 gross tons it must have a fixed piping system to discharge oily mixtures ashore. This system must include（）.
单项选择题 An instrument useful in predicting fog is the（）.
