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单选题
如果用了很大的力来打开组件，则检查控制连杆。
A
If you must apply a strike to open the unit, examine the control linkage.
B
If you must apply an unusual force to open the unit, examine the turnbuckle.
C
If you must apply an unusual force to open the unit, examine the control linkage.
答案解析
正确答案：C
相关知识点：
用大力开组件，检查控制连杆
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