题目

空气中含量较多且化学性质不活泼的气体是…………………………………………(     ) A.氮气     B.氧气     C.稀有气体  D.二氧化碳 答案:AIt was reported that a powerful typhoon hit the Phillippines _______________ November, 2013. A. in                             B. at                              C. on                            D. of
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