单项选择题
In anchoring orders，UP AND DOWN means（）.
A.the chain is not upright B.the chain is tight C.the chain is upright D.the chain is slack
单项选择题 I hereby request permission（）the ship’s main engine for routine maintenance.
单项选择题 I haven’t seen the Harbor Officer（）.
单项选择题 I have steerage way. It is said that（）.
