Filter masks with a combination filter should be brought and used whenever necessary
Only explosion-proof equipment（marked EEx）should be used
Avoid breathing petroleum gases，especially if they come from sour crude（smell of rotten eggs）
so far as possible，take early and substantial action to keep well clear
第1题：
If they had taken my advice, they _______ .
A、had won
B、could won
C、should win
D、could have won
第2题：
What procedures should be taken when you receive helm orders as a helmsman?
第3题：
If you ______ my advice, you wouldn’t be in such trouble now.
A. took
B. takes
C. has taken
D. had taken
第4题：
An on-load release system on a survival craft means the cable can be released ______.
A.only when the load is taken off the cable
B.only when there is a load on the cable
C.only when activated by the controls at the lowering station
D.at any time
第5题：
A vessel is "in sight" of another vessel when ______.
A.she can be observed by radar
B.she can be observed visually from the other vessel
C.she can be plotted on radar well enough to determine her heading
D.her fog signal can be heard
第6题：
When could the risk of asbestos disappeared according to the passage?
A) When we adopt the researchers' advice.
B) When we don't use asbestos.
C) For many years from now, it will not disappear.
D) The council have already find ways to prevent the risk.
第7题：
It should be observed ______ the master is not bound to show both the number of packages and the weight．
A.that
B.which
C.where
D.when
第8题：
Food should be taken in moderate quantity only when one feels hungry.
第9题：
The tanks should then be ______ immediately after the measurements or cargo samples have been taken．
A.topped up
B.braced
C.tommed down
D.re-pressurized
第10题：
When the derrick is stopped, the guy must be （）(收好).