题目

Some women           a good salary in a job instead of staying home, but they decided not to work for the sake of the family. A. could have made B. should have made C. would make D. must make 答案：A下列各种转化实质上不一定是被氧化的是（　　） A、氮的固定B、钢铁生锈（铁锈的成分为Fe2O3?xH2O）C、食物的腐败D、铁或铝在浓硫酸中的钝化