When carrying out the voyage trial, the M-E is not necessary to take（）trial.

A.after the mooring trial has passed
B.before the mooring trial
C.under the surveyors supervision
D.after repair

A.cold condition
B.stillness condition
C.certain air pressure
D.the surveyors supervision

A.take a further inspection in the voyage
B.check and repair, then retrial
C.do as the surveyor’s requirement
D.retrial