题目

 Jack is a good friend _____, he often comes to our home for a visit. A. of my father B. of my father's C. for my father D. with my father 答案：B植食动物是直接以________为食的消费者；肉食动物是以____为食的消费者；既能吃植物、也能吃动物的消费者称为________。