单选题

To bleed the braking system, operate the hand pump handle through its full travel.

AA. 要使刹车系统引气，请通过手泵手柄的整个行程来操作。

BB. 要给刹车系统引气，操作手泵手柄通过系统的全部行程。

CC. 全行程操作手泵手柄以给刹车系统引气。

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正确答案：A （备注：此答案有误）

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