单项选择题
All entries in logbook,（）made,must not be erased or amended.
A.once B.whether C.previous D.just
单项选择题 All entries in the official logbook must be signed by the master and（）.
单项选择题 All event relating to the voyage,such as ship’s position,speed and details of the weather, are recorded in（）.
单项选择题 All inflatable life rafts have（）.
