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刷刷题刷刷变学霸
举一反三
【单选题】The Exploding Lakes of Cameroon What comes to mind when youthink of a lake? You probably imagine a pretty scene with bue water, brds, and fish. FOr the people in the northwestern Cameroon, however,the...
A.
Water will flow down the hills.
B.
Poisonous gases will bereleased suddenly.
C.
A strong wind will rise from the lakes.
D.
The volcanoes will come to life.
【多选题】判别滑坡的标志包括( )。
A.
岩土结构方面的标志，如岩土体扰动松脱现象、产状不连续现象、新老地层倒置现象等
B.
地物地貌标志，如圈椅状或马蹄状地形、鼻状凸丘、多级平台、双沟同源、醉汉林、马刀树等
C.
滑坡边界及滑床标志，如滑坡后缘断壁上的擦痕等
D.
水文地质标志，如坡脚处呈串珠状分布的渗水点、泉点、陡坎下部呈线状分布的下降泉等