The National Aeronautics and Space Administration (NASA) has

The National Aeronautics and Space Administration (NASA) has announced plans to

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对学习迁移现象最早做出系统解释的是__________。

对学习迁移现象最早做出系统解释的是__________。

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The purpose of the program for Jessica’s students is to ____

The purpose of the program for Jessica’s students is to ____.(  ) A.enable them

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You should use _____and natural language when you write a pe

You should use _____and natural language when you write a personal letter.(  ) A

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Scientists can predict regions ____ new species are most lik

Scientists can predict regions ____ new species are most likely to be found.(  )

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