你想问别人她是谁,你可以问:
A:Who is he?
B:Who is she?
① I can play the violin. ____ A. Boom—boom!
② Can you hear my drum? ____ B. Zing—zing!
③ Listen! It's Peter's triangle. ____ C. Ding—ding!
④ I like playing the piano. ____ D. Ting—ting!
下列各数:12、、π、﹣227、5、0.101001…中是无理数的有 ____
《三国志》称秦始皇“罢侯置守,设官分职,不与古同”。这是指秦朝实行了( )