生物圈中的各个生态系统之间是毫不相干的。 （ ）
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每一个生态系统都与周围的其他生态系统相关联，如从地域关系来说，各类生态系统也是相互关联的．如黄河作为河流生态系统，源自西部源头的森林生态系统、草原生态系统．河水奔流东区，滋润着沿途的农田生态系统，养育着亿万人口和其他生物．它们沿途还形成湖泊生态系统、湿地生态系统．最终携带者陆地上的土壤和其他物质，融入海洋生态系统．因此生物圈是一个统一的整体．
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| My name is John Brown. There are l people in my family. My wife (妻子), my daughter and my 2 and I. I was born (出生) _3 1956. My birthday is 4 -New Year's Day. I like basketball but I 5_ volleyball. I think it is 6 . My wife is an English teacher.My daughter has a clothes store 7 clothes are at very good prices. Many people come to her store to 8 clothes. My son is a student. He goes to 9 every day. His school has an 10 . He likes art very much, so he is in the festival every year. | ||||
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