510÷60的商是____位数, 510÷40的商是____位数,
630÷80的商是____位数, 630÷50的商是____位数,
- Sun Yang is ________a talented swimming player.
-That's right. He did best in Barcelona(巴塞罗那)in August, 2013.
近期研制出利用玉米叶片加工、编织购物袋的技术,这种购物袋易分解且物美价廉。该种购物袋的生产厂应该近( )