— Are these shoes yours?
— No, they are .
A:them
B:theirs
C:their
D:ours
在下列方程①x2﹣x+1x;②1a﹣3=a+4;③x2+5x=6;④20x-y+10x+y=1中,是分式方程的有( )
先帝在时,每与臣论此事,未尝不叹息痛恨于桓、灵也。