99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<ruby id="julhe"></ruby><address id="julhe"><code id="julhe"><dfn id="julhe"></dfn></code></address>

<ruby id="julhe"><output id="julhe"></output></ruby>

單項(xiàng)選擇題

If two fuel service tanks are installed, the empty tank should be pumped up directly it is emptyWhat is the meaning of “directly” in the sentence above?（）

A.at once
B.as soon as
C.quickly
D.straight

你可能感興趣的試題

單項(xiàng)選擇題

During tours of inspection in the machinery space, you found a fire on a running generator, what should you do first?（）

A.inform chief engineer officer immediately
B.stop the generator
C.let the duty officer in bridge determine how to do
D.wait for help

單項(xiàng)選擇題

What is used for preventing pollution damage to the sea from ships?（）

A.MARPOL 73/78
B.SOLAS 74
C.STCW 78/95
D.ISPS 2002