题目

为人体生命活动所需要的能量，主要是由_________提供，贮存在人体内的__________是重要的备用能源物质，____________是建造和修复身体的重要原料。    答案：糖类   脂肪   蛋白质The river near our village is about _______ long.A. three-hundreds-metres B. three-hundred-metreC. three hundreds metres D. three hundred metres