下列实验操作或实验结束后仪器放置正确的是

题干

下列实验操作或实验结束后仪器放置正确的是（）

A：氢气还原氧化铜

B：稀释浓硫酸

C：洗干净的试管放在试管架上

D：用过滴管放在桌面上

上一题下一题 0.0难度选择题更新时间:2019-04-23 10:42:18

The job of the speaker	A____
The first thing that you have to do	Write a ____about yourself
The third thing to do	Read the paper to the____
Things you can't do	Don't ____that will make everyone laugh．
The time to get everything ready	____