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单选题
如果这一步不足以阻止泄漏，更换作动器。
A
A.If this step can not stop the leakage, remove the actuator.
B
B.If this step is not enough to stop the leakage, change the motor.
C
C.If this step is not sufficient to stop the leakage, replace the actuator.
答案解析
正确答案：C
相关知识点：
止漏不足换作动器
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