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In aviation, it is mandatory to correctly understand maintenance and operation documentation to make sure that systems operate safely and correctly and to protect human lives.

A In aviation, users must correctly understand maintenance and operation documentation in order to ensure systems operate safely and correctly and to protect human lives;

B In aviation, it is possible to correctly understand maintenance and operation documentation to make sure that systems operate safely and correctly and to protect human lives;

C In aviation, it is a must to correctly understand maintenance and operation material to make sure that systems operate with troubles and correctly and to protect human;

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正确答案：A （备注：此答案有误）

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