单选题

When the required maintenance procedure is not lengthy and is relatively simple,a combination of the above may be grouped under one heading and called Maintenance Practices.

A当所需的维护程序不长且相对简单时，可将上述内容组合为一个标题，称为维护实践；

B当所需的维护程序不长且相对简单时，可以组合为一个抬头，称为维护程序；

C当所需的维护程序不多且相对简单时，可将上述内容组合在一个标题下，称为维护实践；

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正确答案：A （备注：此答案有误）

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