细胞中含有许多物质这些物质可以分为两大类一类是分子比较小的 一般不含碳如水无机盐等另一类是分子比较大的 一般含有碳如糖类蛋白 Template




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tomski细胞中含有许多物质这些物质可以分为两大类一类是分子比较小的 一般不含碳如水无机盐等另一类是分子比较大的 一般含有碳如糖类蛋白 coloring