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【单选题】
Some artificial languages, for example sign languages of deaf communities, later become _____.A.
invented languages
B.
natural langugaes
C.
international lanugages
D.
second languages
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【简答题】.A fire broke out in a neighbouring street yesterday,but it was soon_______by the firemen. A,gone out B, put out C,given out D,made out
【单选题】As a duty engineer, as soon as your hear the fire emergency signal, you should ensure that the
A.
ring buoys are thrown overboard
B.
engines are stopped
C.
fire pumps are started
D.
life preservers have been issued to everyone
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