单项选择题
A.give access to
B.links up with
C.have contact with
D.is constructed of
单项选择题 How many hours of rest is the minimum required in a normal day?（）
单项选择题 If the electronic chart is part of an ECDIS,it must display the minimum data required by IMO/IHO,to include all of the following EXCEPT（）.
单项选择题 （）on still water indictes how loading weight distribution affects on longitudinal strength.