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isomerase _____________。

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acetone _____________。

Many important industrial compounds such as ethanol, acetic acid, organic acids, butanol and acetone were being produced by the end of 19th century by microbial fermentation procedures that were open to the environment.

Isolated enzymes have long been a part of many biotechnological possesses and their catalytic properties are being further-utilized with the development of suitable immobilization techniques allowing reuse of the biocatalyst.

经社理事会的主要职权是( )。

A. 维护国际和平和安全
B. 促进国际经济及社会的国际合作
C. 建立国际社会经济新秩序
D. 经济援助

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