题海让大学四年没有难题
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单选题 What are some common defects that can appear in concrete ties

A. Only dirtiness and settlement

B. Transverse fissures and shoulder damage

C. Rusting and corrosion

D. Wear from train wheels

行业英语-铁路课程封面

学科:行业英语-铁路

时间:2025-07-09 00:53:08

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