在 ①2+1=3,②4+x=1,③y2﹣2y=3x,④x2﹣2x+1中,方程有____ (填序号)
写出下列词语的近义词。
舒展-____ 美丽-____ 轻盈-____
Don't put off today's work for tomorrow. I mean, today's work______ today.