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【判断题】
电器或线路着火时，要先切断电源，再用干粉灭火器或气体灭火器灭火，不可直接泼水灭火，以防触电或电器爆炸伤人。A.
正确
B.
错误
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举一反三
【单选题】When you cross the street, you can never be ______ careful.
A.
much
B.
very
C.
too
D.
so
【单选题】Paragraphs 3_________
A.
When you get up
B.
Where you stand while waiting to cross a road
C.
Where you walk
D.
Where you sit on a bus and how you travel
E.
When you go to bed
F.
When pollution levels rise and fall
【单选题】When you cross the street, you can never be _______ careful.
A.
too
B.
very
C.
much
D.
so
【单选题】You _____ be careful when you cross here --- the traffic lights aren’t working.
A.
could
B.
might
C.
ought to
D.
may
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