单选题:There is not much the airlines can do when it comes to______

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题目内容:
There is not much the airlines can do when it comes to__________. A.making sure the departures are not delaye
B.the efficient handling of luggag
C.speeding up customs procedur
D.the improvement of the condition of waiting lounge
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下图左边给定的是纸盒的外表面,下面哪一项能由它折叠而成?

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Messalina's name has become a byword for notorious behavior.A.an epithet B.an ab

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Laser beams can be used to bore metals and other hard materi

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A responsive B responses to    C respond toD responding

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如图所示,一根木棒AB在O点被悬挂起来,AO=OC,在A、C两点分别挂有两个和三个钩码,木棒处于平衡状态。如在木棒的A、

如图所示,一根木棒AB在O点被悬挂起来,AO=OC,在A、C两点分别挂有两个和三个钩码,木棒处于平衡状态。如在木棒的A、C点各增加一个同样的钩码,则木棒(  )

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