题干

配制一定物质的量浓度的溶液时,下列操作会使所配溶液浓度偏高的是(  )

A:省去洗涤烧杯的步骤

B:定容时俯视

C:定容时仰视

D:容量瓶水洗未干燥

上一题 下一题 0.0难度 选择题 更新时间:2019-03-19 01:23:59

答案(点此获取答案解析)

B

同类题3

When it was his turn to deliver his speech, ______, he walked towards the microphone.