隧道养护作业人员应穿戴（）。
A、反光服装
B、防尘口罩
C、安全帽
D、A和C
参考答案：D
牵引力、冲击力在钩缓装置中的传递顺序
翻译句子
1. Her novel is still relevant today.
2. Do you have the relevant experience?
3. I don't see the relevance of your question.
