单项选择题
A.it is difficult for them to finish the job in time
B.difficult for them to finish the job in time
C.they have much difficulty to finish the job in time
D.that difficult for them to finish the job in time
单项选择题 During port state control inspection, if one generator is out of commission, （）should investigate whether power is available and conduct tests.
单项选择题 During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?（）
单项选择题 When the PSCO would like to witness a fire drill carried out by the crew, he should consult （）to locate a simulated fire.