土层锚杆极限搞拔试验的目的是确定锚杆的荷载—变位曲线。
参考答案：错
_____ is known to all, China will be an ______ and powerful country in 20 or 30 years' time. [ ]
A. That; advancing
B. This; advanced
C. As; advanced
D. It; advanced
什么是无障碍环境？
