① ____ A. watch B. bag C. hard
② ____ A. feel B. touch C. soft
③ ____ A. smooth B. rough C. like
优雅的《梁祝》曲用小提琴或钢琴演奏都很美妙,你能听出是钢琴还是小提琴演奏,主要是依据声音的( )
如图,EF是△ABC的中位线,O是EF上一点,且满足OE=2OF.则△ABC的面积与△AOC的面积之比为( )
—It's a long time ________ I saw you last.
—Yes,and what a pity!It will be a long time ________ we see each other again.