建设项目经济费用和效益的计算原则中,项目产出物的负面效果的计算遵循( )。
A.支付意愿原则 B.受偿意愿原则C.机会成本原则 D.实际价值计算原则
参考答案:B
--- I regret ________ you that John has been fired.
--- I can hardly believe my ears. He is such a fine worker.
A.telling
B.having told
C.to tell
D.to have told
进行边坡工程勘察时,勘探孔深度应穿过潜在滑动面并深入稳定层( )。
A.1~2m
B.1~3m
C.2~5m
D.3~6m