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打开多个文档时，按________组合键，可以按照从左到右的顺序依次切换图像窗口。
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Biotechnology utilizes bacteria, yeasts, fungi, algae, plant cells or cultured mammalian cells as constituents of industrial processes.
decomposition of a given starting material (e.g. sewage disposal, destruction of industrial wastes or oil spillages).
The reactions of biotechnological processes can be anabolic or biosynthetic, whereby simple molecules are built up into more complex ones.
Catabolic reactions are usually exergonic whereas anabolic reactions are normally endergonic.
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