两个面积相等的梯形，一定可以拼成一个长方形．
中国名著《西游记》中,唐僧师徒西天取经中的“西天”和“经”分别代表的是 ( )
— Your painting really improves a lot.
— I have taken a painting ________ since last year. I find my painting is getting better.
