井深在3500m以内18m井架后头道地锚的开挡是14～18m。_爱下问搜题

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问题判断题

井深在3500m以内18m井架后头道地锚的开挡是14～18m。

答案

参考答案：对

选择题

— We want to sit at the table near the door.
— I'm sorry, but it ______ already.

A. was taken
B. has taken
C. will be taken
D. has been taken

问答题

简述计算机网络安全面临的主要威胁。