Due to the shape of the（），whereby forward- and aft ship are differently shaped，a trim correction on the draft measurement has to be done.

A.incoming data
B.working data
C.outgoing data
D.new data

A.Filter masks with a combination filter should be brought and used whenever necessary
B.Only explosion-proof equipment（marked EEx）should be used
C.Avoid breathing petroleum gases，especially if they come from sour crude（smell of rotten eggs）
D.so far as possible，take early and substantial action to keep well clear

A.to／for
B.for／to
C.by／through
D.through／for