题目

—Paul isn’t as________as Sandy. He often makes mistakes in his homework. —That’s the main thing.. A. careless             B. more careful            C. more careless          D. careful 答案：D一个长方形枕套，长40厘米、宽30厘米，四周围上花边，至少要用多少厘米的花边？列式不对的是（　　） A、（40+30）×2B、30+40×2C、40×2+30×2