题目

在配制一定物质的量浓度的盐酸溶液时，下列错误操作可使所配制溶液浓度偏高的是(    ) A.用量筒量取浓盐酸俯视读数              B.溶解搅拌时有液体飞溅 C.定容时俯视容量瓶瓶颈刻度线            D.摇匀后见液面下降，再加水至刻度线 答案：C 解析:A项偏低，浓HCl的体积量少；B项液体飞溅损失了溶质；C项加少了水；D项多加了水。连词成句。1. My is a father farmer ( . )_________________________________________2.is The tall wall ( . )__________________________________________3.He play basketball likes to ( . )___________________________________________4. too The world small is ( . )___________________________________________5.The a nurse girl is ( . )___________________________________________