下列分式是最简分式的是( )
A:2a2+aab
B:6xy3a
C:x2-1x+1
D:x2+1x+1
下列各句中,没有语病、句意明确的一项是( )
选择合适的句子补全对话。
Amy: Where is my ruler, John?
John:____
Amy: No, it's not in my pencil box.
Amy: Yes, thanks.
A. Look, it's on your desk. B. Is it in your pencil box?