2. 外语
  3. Like several other important advances in medicine, penicillin was a somewhat (i) ______ discovery resulting from (ii)______combi

Like several other important advances in medicine, penicillin was a somewhat (i) ______ discovery resulting from (ii)______combi

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问题 Like several other important advances in medicine, penicillin was a somewhat (i) ______ discovery resulting from (ii)______combination of blind chance and technical expertise.
选项
答案C，D
解析 resulting from说明前后同义重复。两空联动，同义重复。progressive进步的，untimely时间不恰当的，accidental意外的；favorable有利的，unlucky不幸的，reliable可靠的。答案选CD。
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