全断面隧道掘进机
参考答案：
用暗挖法在山岭地区全断面同时掘进钻凿隧道的机具。
教育心理学
______ yourself with positive people, and you will keep focused on what you can do instead of what you can’t.
A．Surround
B．Surrounding
C．Surrounded
D．Have surrounded
