A. is easy for chickens to digest B. is insufficient for the needs of poultry C. is fully utilized in meat and egg production D. is inefficiently converted into meat and eggs 参考答案:D 答案解析:归纳题。根据文章第二段的内容可知,由于有许多食物在饲养动物过程中被浪费掉,所以生产肉类所需要的蛋白质要远远大于生产蔬菜所需要的蛋白质,而且整个动物只有44%能被食用。由此不难看出蔬菜在养殖中未得到有效