涵洞
参考答案:
在土石坝枢纽中,当由于两岸地质条件或其他原因不易开挖隧洞时,采用在土石坝下埋社涵管的方式。
— Honey, the cat's stuck in the tree. Can you turn off the TV and get a ladder. . . ?
— Oh, it jumped off. _______. [ ]
A. Never mind
B. All right
C. No problem
D. Take care
滑坡的分类