After the trouble of the automatic control system has been completely eliminated, assistance is () required.
A、remained
B、still
C、no longer
D、much mere
A、remained
B、still
C、no longer
D、much mere
A、A.the period of time during which no trouble occurs to the engine B、B.no trouble will occur to the engine all its life C、C.trouble may occur freely to the engine D、D.no matter what you do to the engine, no trouble will occur during this period
A、be switched off by the duty officer B、be switched on by the duty officer C、be switched off automatically D、be switched on automatically
A、their no trouble period B、their freely trouble period C、its free trouble life D、its trouble-free life
A、the port of destination B、the next port of call C、the port of arrival D、the last port of call
A、where is the trouble B、where does the trouble C、where the trouble lies D、what is the trouble
A、the port of destination B、the next port of call C、the port of arrival D、the last port of call
A、A.before the conclusion of the voyage B、B.after the conclusion of the voyage C、C.as soon as the expenditure occurs D、D.before or after the conclusion of the voyage
A、3 years after making the first entry B、2 years after the last entry C、3 months after last entry D、3 years after the last entry