问题
单项选择题
《维规》规定，钢轨顶面擦伤深度超过（）为重伤钢轨。
A.0.5mm
B.1mm
C.1.5mm
D.2mm
答案
参考答案：D
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《维规》规定，钢轨顶面擦伤深度超过（）为重伤钢轨。
A.0.5mm
B.1mm
C.1.5mm
D.2mm
参考答案：D
| Choose and fill in the blanks. 形容词大比拼。选择恰当的形容词填空。（每词限用一次） | |
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