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10.This produced a chain (连锁) reaction.

分析 这产生了一系列的连锁反应.

解答 答案:chain.
分析句子结构可知,本句考查名词作定语,修饰reaction,结合汉语意思可知,答案为chain.

点评 首字母填空题考查的是词汇的记忆和运用能力,平时要注意积累和运用.同时还要注意提示字母.

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