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【单选题】
不属于隔离式自救器的是（）A.
过滤式自救器
B.
压缩氧自救器
C.
化学氧自救器
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【简答题】To us it seems so natural to put up an umbrella to keep the water off when it rains, But actually the umbrella was not invented as protection against the rain, Its first use was as a shade against the...
【简答题】To us it seems so natural to put up an umbrella to keep the water off when it rains, but actually the umbrella was not invented as protection against the rain, Its first use was as a shade against the...
【单选题】The suggestion was made ______ the basketball game _____ put off due to the snow. [ ]
A.
for; to
B.
that; be
C.
which; should be
D.
that; was
【单选题】Don't . Become a volunteer today. [ ]
A.
put it off
B.
put off it
C.
put it on
D.
put on it
【单选题】We will put off the picnic in the park until next week,________ the weather may be better.
A.
that
B.
where
C.
which
D.
when
【简答题】A．put off B．put off it C．put it off D．put them off
【单选题】We are in favor of your proposal that the meeting ______. A. B. was put off C. should put off D. is to put off
A.
should be put off
B.
was put off
C.
should put off
D.
is to put off
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