题目

 (    )45. -- Mum, could you buy me a dress like this?          -- Certainly, we can buy _______one than this, but ________this.         A. a better, better than              B. a worse, as good as C. a cheaper, as good as            D. a more important, not as good as 答案：C在食物链“水草→虾→鱼→鱼鹰”中，哪一环节含有的能量最多A.水草B.虾C.鱼D.鱼鹰