What kind of questions should we ask our students when we want to give them a reason to read?
下列分组中属于按品质标志分组的是（） ["在校学生按性别分组","企业按职工人数规模分组","职工按工资水平分组","人口按年龄分组"]
Why do we say that reading aloud is not very useful for reading a text in class?
对外贸易对于经济发展的真正重要作用是从（）社会开始的。
灰平衡的作用是什么？影响印刷灰平衡的因素有哪些？
黑版的作用有哪些？按作用范围分成哪几种？
