该动车组客座人公里收入率为( )。

该动车组客座人公里收入率为( )。A.2040.54 B.2213.62 C.2550.69 D.2618.24

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Traditionally, a child is supposed to learn about the adult

Traditionally, a child is supposed to learn about the adult world ________.A.thr

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下列生理活动调节中具有正反馈控制的是(  )

下列生理活动调节中具有正反馈控制的是(  )A.血压的压力感受性反射 B.胃液分泌的反射性调节 C.排尿反射 D.排汗反射 E.骨骼肌的牵张反射

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For many years the Japanese have ________ the car market.

For many years the Japanese have ________ the car market.A.operated B.occupied C

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Professor Smith explained the movement of light (  ) that of

Professor Smith explained the movement of light (  ) that of water.A.by analogy

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