What___"nr"mean?用is\does\do里面的哪个Thank you!

What___"nr"mean?用is\does\do里面的哪个Thank you!
What___"nr"mean?用is\does\do里面的哪个
Thank you!

What___"nr"mean?用is\does\do里面的哪个Thank you!
does

"does"
mean是动词，所以不能用is
"nr"作为主语是单数，所以用does

does...
如果用is,改成
what is the meaning of 'nr'?

what does ...mean?
what's the meaning of ...？
所以套用格式，选择does

does！莫非你也在做作业？？

does .呵呵，都在做作业啊。。。