题目

A policeman shouted to the criminal ,“Put up your hands and stand still______the law.”    A.in the name of  B.at the mercy of     C.by the name of  D.regardless of 答案：A17．下列物质的用途中，利用其物理性质的是（　　）A．氧气用于气焊B．浓硫酸作干燥剂C．铁粉作食品保鲜吸氧剂D．小苏打治疗胃酸过多症