题目

阅读理解IfI could give today's young people three wishes, they would be: More hugs. Moretime outside in nature. More belief in their own power to change the world. Whilemost people understand the importance of the first two wishes, the third oneleaves some folks wondering why young people's belief in their own power is soessential. Let's start with the idea that all of us-especially young people-need heroes. We need them to be our guides on the difficult trail(足迹)we call life and to show us just how far we can go. And we need heroes today more than ever. Our modern society is terribly 一个池塘生态系统的组成包括（ ）A．植物、动物、真菌和细菌B．生产者、消费者、分解者C．阳光、空气、水D．生物部分和非生物部分