题目内容
维持生命必须的食物有三类。一是碳水化合物。碳水化合物广泛存在于动、植物，包括糖、淀粉及纤维分子(cellulose)，为人类提供能量。碳水化合物还能合成生物过程所必须的葡萄糖和酶(enzymes)。二是脂肪。脂肪是比碳水化合物更为“浓缩”的食物能量，但是，它只作为储存能量而不是立即可用的能量。三是蛋白质。蛋白质是由含碳、氢、氧和氮元素的大分子组成的。蛋白质主要不是用于提供能量，而是组成生命所必须的结构物质。
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32 analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the 33 for designing and constructing an improved system. 34 is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called 35 . 36 is another such technique that integrates data and process concerns into constructs called objects.
32 analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the 33 for designing and constructing an improved system. 34 is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called 35 . 36 is another such technique that integrates data and process concerns into constructs called objects.
32 analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the 33 for designing and constructing an improved system. 34 is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called 35 . 36 is another such technique that integrates data and process concerns into constructs called objects.
32 analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the 33 for designing and constructing an improved system. 34 is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called 35 . 36 is another such technique that integrates data and process concerns into constructs called objects.
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