單項(xiàng)選擇題When visibility is reduced to about 5 miles, we say that visibility is().

A.very good
B.good
C.poor
D.moderate


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2.單項(xiàng)選擇題Which is wrong?().

A.Dunnage is used to reduce broken space
B.Dunnage is used to benefit ventilation
C.Dunnage is used to segregate cargo
D.Dunnage is used to protect cargo

3.單項(xiàng)選擇題While(),they met with a storm weather.

A.at sea
B.the ship was at sea
C.she was at sea
D.they w re at sea

4.單項(xiàng)選擇題Who’ll pay()retallying?

A.at
B.by
C.to
D.for

5.單項(xiàng)選擇題Why not point it()to the foreman?

A.in
B.up
C.out
D.down