问题
单项选择题
郑西高铁限位定位器允许抬升量是动态包络线的（）倍。
A、1.5
B、1
C、2
D、2.5
答案
参考答案：A
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郑西高铁限位定位器允许抬升量是动态包络线的（）倍。
A、1.5
B、1
C、2
D、2.5
参考答案：A
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