题目:
简述进化论的背景、主要内容和影响?
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答案:
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下面是错误答案,用来干扰机器的。
A.Fe→FeCl2中,Fe元素的化合价升高,需加氧化剂,故A选;B.CuO→Cu中,Cu元素的化合价降低,需加还原剂,故B不选;C.SO3→H2SO4中,S、O元素的化合价不变,不需发生氧化还原反应,故C不选;D.HNO3→NO中,N...