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【单选题】
对发电厂、变电所内的阀型避雷器每年( )季节前要测量其绝缘电阻。A.
春
B.
夏
C.
秋
D.
雷雨
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【单选题】Try your best to run fast, ________ you will fall behind others. [ ]
A.
and
B.
but
C.
so
D.
or
【单选题】. As Christmas draws near, they feel more and more uneasy with their stored money ____.
A.
to be run out
B.
to run out of
C.
being run out
D.
running out
【单选题】It is said that the transport company will soon run ______ petroleum.
A.
over
B.
down
C.
off
D.
out of
【单选题】Beginning from a long run equilibrium in an increasing cost industry, if there is a substantial, permanent fall in demand for industry output:
A.
firms will leave the industry, the quantity produced will fall, and prices will end up lower than their initial long run equilibrium level.
B.
firms will leave the industry, the quantity produced will fall, and prices will end up higher than their initial long run equilibrium level.
C.
firms will leave the industry, the quantity produced will fall, and prices will end up at the same level as their initial long run equilibrium level.
D.
firms will enter the industry, the quantity produced will rise, and prices will end up lower than their initial long run equilibrium level.
【单选题】If oil supplies run out, the man may have to fall back on the horse.(改错题)
A.
run
B.
the man
C.
to fall
D.
on
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