单项选择题
（）the morning from 0800 to 1200 chief officer is on duty.
A.On B.In C.At D.During
单项选择题 （）the packing is the same, the lots are different inmarks.
单项选择题 （）the repeater compass with the master compass, please.
单项选择题 （）the whole the stowage is all right.
