单项选择题
A.afford access to the shell through the double bottoms B.collect water to be pumped out C.provide access for the pneumercator D.provide a base line for sounding measurements
The portable radio apparatus means（）.A.the radio appara...
单项选择题The portable radio apparatus means（）.
A.the radio apparatus fitted on the portside B.the radio with a portable equipment C.the radio equipment which is easily movable D.the portable radio with some apparatus
The most common type of davit found on merchant vessels...
单项选择题The most common type of davit found on merchant vessels today is the（）.
A.radial B.sheath-screw C.gravity D.quadrantal
The holding capability of an anchor is primarily determ...
单项选择题The holding capability of an anchor is primarily determined by the（）.
A.shape of the anchor B.stowage of the anchor on board C.anchor's ability to dig in D.size of the vessel and its draft
