化学家庭小实验是利用家庭日常生活用品进行化学学习和研究的活动,利用日常生活用品,下列实验设计不能完成的是A.用粥汤检验碘盐中是否含有KIO3B.用醋酸除去热水瓶中的水垢C.用食用碱(Na2CO3)溶液洗涤餐具上的油污D.淀粉溶液具有丁达尔现象 答案:A ---- Did Mary come to the party? ---- I don’t know. She _____ while I was out. A. might have come B. might come C. should have come D. must have come