题型:问答题 简答题 下列关于金属和金属材料的说法中不正确的是( )A.对废旧电池中汞的回收可以减轻环境污染B.铝表面的致密氧化膜可以阻止铝进一步氧化C.经常用水冲洗铁制品表面可以防止铁生锈D.Ag、Mg、ZnSO4溶液可用来探究镁锌银的活动性顺序 查看答案
题型:问答题 简答题 ______ his body and soul to bringing up-to-date technology and International attention to China's Aids problem, Dr David Ho, born in Taiwan, spent little time with his family.A.DevotedB.To devoteC.Being devotedD.Devoting 查看答案