题海让大学四年没有难题
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题目详情

单选题 What is the responsibility of subgrade workers in maintaining the subgrade

A. To repair the railway tracks

B. To repair broken bridges and tunnels

C. To regularly patrol, maintain, and repair subgrade drainage facilities and protective reinforcement equipment

D. To manage train schedules

行业英语-铁路课程封面

学科:行业英语-铁路

时间:2025-06-17 04:43:10

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