→范文|衔接张力理论 大气压力的水可以支持长达 10 米的高柱。但植物可将水送得更高了红杉的树可以水泵到树顶超过地面以上 100 米。直到十九世纪末,在树木和其它高大植物水分运动还是一个谜。一些植物学家推测,植物中的活细胞作为水泵的角色。但许多实验表明,在...…〔06-15〕
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→英语|英语四级作文模板大全 一、说明原因型模块 Currently, XX has been the order of the day. This does demonstrate the theory nothing is more valuable than X…〔06-14〕
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→文化|Helping hand According to the theory, people or animals can pass on their genes by helping their relatives. That means they should…〔06-18〕
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→英语|In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model t…〔05-17〕
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