蛋白质是由多种 构成的极为复杂的化合物,是重要的营养物质。血红蛋白与 结合会导致煤气中毒。糖类是由 三种元素组成的化合物,米和面中含有的糖类物质主要是 ,它在人体的消化系统中经 的催化作用,最终变为 (化学式为 C 6 H 12 O 6 )。
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A.
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B.
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D.
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