A: What are they?
B: They are ____.
A: Do you like ____?
B: Yes, I do.
“母亲——伏尔加”所属的国家是( )
My mother likes rideing bycycles. ____
下列式子中:①2<0;②2x﹣3>0;③x=2012;④x2﹣x;⑤x≠0;⑥x+3>x+1,其中是不等式的有____(填序号)