Who could tell me what is de different between the soft copy and hard copy?Thanks.

who am I Could someone tell me COULD U TELL ME WHO R THEY could you please tell me who .______?3Q Could you tell me who is the tall man?还是 Could you tell me who the tall man is? could you tell me ---------?A who you are waiting for B who you were waiting for? Who can tell me Tell me.who am Who can tell me Who Can Tell Me who can tell me tell me who you who can tell me, Who?tell me! who can tell me? could you tell me who is our teacher?这句为什么不倒装? Who could tell me the brief history of Google cooperation in English?Thank you! Could you tell me who is your teacher?这句是什么从句啊? who could tell me that what on earth I can do