⑴How old are you?____ A. Thank you.
⑵This is for you.____ B. Yes, it is.
⑶Don't shout here.____ C. I'm six.
⑷Where's my schoolbag?____ D. I'm sorry.
⑸Is that your pencil?____ E. It's under the desk.
下列说法,最为确切的是( )
试推断
①A:____、B:____、C:____、D:____、E:____
②写出A生成C的离子方程式:____;
③写出白色沉淀变为红褐色沉淀的化学方程式:____.