The study of ecology is important for
everyone who cares about our world. Air, water, and land -- we would not live
without any of these. But what do we mean by land It is the earth beneath our
feet, wherever we are. It is mountains and plains. It is wide fields for growing
com and wheat. Or it may be an airfield or a parking lot or a highway or a whole
city -- land covered with cement, asphalt, and buildings. Land is the solid part
of the Earth. Land is the soil plants grow in. That is the most important things about the land -- it is the place where green plants grow. Without green plants there would be not life on Earth. Green leaves make oxygen. All of us -- ants, elephants, people, every living creature -- must have oxygen to stay alive. We breathe in oxygen and our bodies use it. Carbon dioxide is formed in the process A. The Products of Nature B. The Life Pattern on Earth C. The Exhausted Ecological System D. The Broken Balance of Nature [单项选择]
The study of ecology is important for everyone who cares about our world. Air, water, and land -- we would not live without any of these. But what do we mean by land It is the earth beneath our feet, wherever we are. It is mountains and plains. It is wide fields for growing com and wheat. Or it may be an airfield or a parking lot or a highway or a whole city -- land covered with cement, asphalt, and buildings. Land is the solid part of the Earth. 我来回答: 提交
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