稳态
指内环境的理化性质,如温度、pH、渗透压和各种液体成分等的相对恒定状态。
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上一篇:到( )年,60岁以上人口约2.5亿人,老年抚养系数约27%。
下一篇:(1) The confidence people place in science is frequently based not on what it really is, but on what people would like it to be. When I asked students at the beginning of the year how they would define science, many of them replied that it is an obje