下列除杂(括号内为杂质)选用的试剂或方法正确的是

题干

下列除杂(括号内为杂质)选用的试剂或方法正确的是（）

A：CO₂(CO)：点燃

B：Na₂SO₄溶液(NaOH)：加适量稀盐酸

C：CO₂(HCl)：将气体通入足量的氢氧化钠溶液

D：CaCl₂溶液(HCl)：加入过量碳酸钙，充分反应后过滤

上一题下一题 0.0难度选择题更新时间:2018-06-26 03:43:32

D

Situations	Differences
Situations	Britons (英国人)	Americans
When being knocked into	They will say “sorry” before the other does.	They will ____ the person and expect him to say “sorry”.
When going out for dinner	They will ____ when going out for dinner.	They may wear a normal shirt to go to a good____.
When taking a taxi	They will give an address to the taxi driver and then ____.	They will ____ the taxi driver all the time.