{#{QQABTYAs4wIQwJRACY4aA0GoCQsYsJASJOgOgQCUqAwLCQFIBIA=}#}{#{QQABTYAs4wIQwJRACY4aA0GoCQsYsJASJOgOgQCUqAwLCQFIBIA=}#}{#{QQABTYAs4wI...
3.D解析:甲醛是工业防腐剂,不是食品添加剂,且甲醛有毒,危害人体健康,D项错误。4.C解析:0.1mol[Cu(N2H4)2]2+中σ键的数目为1.2NA,A项错误;标...
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