下列做法中，会使空气质量降低、雾霾加剧的是（    ）

在正四面体$P-ABC$（所有棱长都相等）中，D,E,F分别是AB,BC,CA的中点，下面四个结论中不成立的是（  ）

A:Maria,____?

B:I think a good friend is good at sports.

A:You mean he or she is athletic?

B:Yes.And ____.He or she often makes me laugh.

A:Anything else?

B:Er,I think____ .

A:I can't agree with you. I like to have friends____.

B:Do you think a good friend should be popular in school, too?

A:Well,____.

A. who are different from me

B. how are you

C. a good friend likes to do the same things as me

D. that's not very important for me

E. what is a good friend like

F. you are right

G. he or she is funny

①NH₄Cl与ZnCl₂溶液可作焊接金属中的除锈剂；

②用NaHCO₃与Al₂(SO₄)₃两种溶液可作泡沫灭火剂；

③草木灰与铵态氮肥不能混合施用；

④实验室盛放Na₂CO₃溶液的试剂瓶不能用磨口玻璃塞；

⑤加热蒸干AlCl₃溶液得到Al(OH)₃固体。