According to MLC,the minimum hours of rest shall not be less than 10 hours in any 24-hour period,and（）hours in any seven-day period.

（）directly affect the fitness and ability of a seafarer...

单项选择题（）directly affect the fitness and ability of a seafarer to perform watchkeeping duties.

Malacca Strait is 805 km（）and（）from 64 km in the S to 2...

单项选择题Malacca Strait is 805 km（）and（）from 64 km in the S to 257 km in the N.

It is customary in shipping practice to quote freight r...

单项选择题It is customary in shipping practice to quote freight rates（）weight or measurement,ship’s option.