分离混合物最常用的方法是()。
参考答案:蒸馏
——________?
——Father’s Day is coming. I’d like to buy a present for my father.
A.How much would you like
B.What can I do for you
C.What colour do you want
D.What size would you like?
20世纪以后教育的新特点包括( )。
A.教育的终身化和全民化
B.教育的民主化
C.教育的多元化和教育技术的现代化
D.教育的法制化