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    33．In preparation for the launching of Chang'e I, scientists need knowledge of weather changes． A．the; the B．a; / C．/; a D．the; a 【查看更多】

     

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    In ___ preparation for the launching of Chang’e I , scientists need ___ knowledge of weather changes .

    A. the ; the                B. a  ; /              C. / ; a                        D. the ; a

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