题目

把SO2通入Fe(NO3)3溶液中,溶液由棕色变为浅绿色,但立即又变为棕黄色,这时若滴入BaCl2溶液,会产生白色沉淀。在上述一系列变化过程中,最终被还原的是 A、NO3-             B、SO2              C、Cl-                  D、Fe3+ 答案:【答案】A7.  (2015江苏江阴长泾片期中,11) —She’s seldom asked to do housework at home,she?    --.Her parents are very busy with their work,so she has to do some cleaning every day.   A. has;Yes   B. hasn’t;No   C. is;Yes   D. isn’t;No 
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