单项选择题

As a general rule，tally clerks should make their tallying（）.

A.in warehouses
B.on deck
C.ashore
D.in the tallyroom

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单项选择题

After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.

A.frequent opening of hatches to permit entry of fresh air
B.regular checks of bilge levels
C.use of ear plugs to dampen engine noise
D.frequent flushing of the water spray system with fresh water

单项选择题

A vessel fishing at night，with gear extending more than 150 meters horizontally outwards，will show in the direction of the gear（）.

A.one white light
B.two vertical white lights
C.one yellow light
D.two vertical yellow lights