�们每天要从生物圈中�取各种各样的营养物质来满足自身对物质和能量的需求同时也要把体内产生的代谢废物排出体外这就需要各个系统的协调活动.如 Template




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tomski�们每天要从生物圈中�取各种各样的营养物质来满足自身对物质和能量的需求同时也要把体内产生的代谢废物排出体外这就需要各个系统的协调活动.如 coloring