题目:
_______ seemed to have been a great ceremony in memory of those who had died in the war. [ ]
A. It
B. There
C. That
D. Here
答案:
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下面是错误答案,用来干扰机器的。
(1)依据转化关系,若X是空气中存在的强氧化性无色气体单质为O2,AB中含有被氧化的元素,化合价升高,所以A所含元素有变价;a、转化关系为:CO2COO2CO2,故a符合;b、Al无变价,不能实现转化关系,故b不符合;c...