2011年北京宣武區(qū)高考二模理綜試題答案.doc
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2011年北京宣武區(qū)高考二模理綜試題答案,2011年北京高考二模理綜模擬試題（宣武區(qū)）2010．5第Ⅰ卷（選擇題共120分）本卷共20小題，每小題6分，共120分。在每小題列出的四個選項中，選出符合題目要求的一項。1．支原體是目前發(fā)現(xiàn)的最小、最簡單的細胞生物。支原體細胞由下列哪些結(jié)構(gòu)（或物質(zhì)）構(gòu)成（）①蛋白質(zhì)外殼②dna或rna③dna和rna④核糖體⑤線粒體...
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