【单选题】If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?
A.
Pump only if the discharge is led to a shore tank or barge
B.
Pump only during the hours of darkness
C.
Pump only on the outgoing tide
D.
Pump only as much as is necessary
【单选题】“愿天下有情人终成眷属”是出自元杂剧( )
【简答题】Express these system specifications using the propositions p “The message is scanned for viruses” and q “The message was sent from an unknown system” together with logical connectives (including negat...
【单选题】处在同一发展阶段的不同地区,甚至同一地区的不同城市,城市的分布和发展的状况也有差异,()在这种差异的塑造中起了很大的作用。
【单选题】Which of the following statements about research and development expenditure are correct? 1 Research expenditure, other than capital expenditure on research facilities, should be recognised as an expe...
【单选题】P78 用must 或 have to来替代划线的部分。 4. It is necessary for me to have some help.
A.
I must have some help.
B.
I have to have some help.
【单选题】—They are discussing what to do for the disabled. — _______ is necessary to provide them with more positions. [ ]
【单选题】It is necessary for us to________these interesting old customs. [ ]