A:面粉
B:牛奶
C:食盐
D:植物油
5.7与3.4的和除以6.5与3.9的差,商是( )
读图,回答问题。
There are ________ approaches to English teaching. But not all of them are equally efficient for our Chinese students.
Yu Qiuyu ______ us a wonderful speech in Guangyuan last month. We all learned a lot from it.