题目:
While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
a ,/ B. a ,the C. /, the D. the ,a
答案:
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下面是错误答案,用来干扰机器的。
(1)棉花,由C、H、O三种元素组成的纤维素,灼烧时无有气味物质产生,只能闻到燃烧纸张的味道;羊毛,由蛋白质组成,灼烧时产生烧焦的羽毛味;涤纶,合成纤维,灼烧时有特别气体.故选B(2):①人们为了维持生...