题目

  One of our biggest fears nowadays is that our kids might some day get lost in a “sea of technology” rather than experiencing the natural world. Fear-producing TV and computer games are leading to a serious disconnect between kids and the great outdoors, which will change the wild places of the world, its creatures and human health for the worse, unless adults get working on child’s play.    Each of us has a place in nature we go sometimes, even if it was torn down. We cannot be the last generation to have that place. At this rate, kids who miss the sense of wonder outdoors will not 如果某食物中有 3/5来自绿色植物，1/5来自小型肉食动物，1/5来自羊肉，假如传递效率为10%，那么该人每增加1千克体重，总共需消耗植物约 A．10千克       B．226千克        C．100千克        D．26千克