锚杆的埋置深度一般覆土厚度不小于（）
A.2～4m
B.4～5m
C.5～8m
D.8～10m
参考答案：B
根据对话内容排序：
A. Anything else?
B. Yes. I would like to have the beef, please.
C. OK. I will get the things ready for you soon.
D. May I take your order, sir?
E. A tomato salad and a bottle of beer.
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设备正常的润滑油色为（）
A、黄色
B、乳白色
C、暗绿色
D、橙色
