12.“绿叶在光下制造有机物 实验中把盆栽植物先放到�暗处一昼夜目的是 A.设置对照实验b.控制该实验的变量 光c.让叶片中原有的 Template




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tomski12.“绿叶在光下制造有机物 实验中把盆栽植物先放到�暗处一昼夜目的是 a.设置对照实验b.控制该实验的变量 coloring