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【简答题】
64D 型继电半自动闭塞的发车轨道电路应采用( )式,接车轨道电路应采用( )式。
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举一反三
【简答题】长篇阅读：Climate change may be real, but it’s still not easy being greenClimate change may be real, but it’s still not easy being green How do we convince our inner caveman to be greener?We ask some outst...
【简答题】粘性泥石流所具有,破坏力强,是泥石流的什么特征
【单选题】Change in climate may have caused______.
A.
dinosaurs to die
B.
dark spots to form. on the sun
C.
volcanic eruption
D.
air pollution
【单选题】The change in climate may _______ our health. We should take good care of ourselves.
A.
effected
B.
affect
C.
have effect
D.
have affect
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