Much to our shock, none of the 100 people were able to________the gas blast, which brought great grief to their family.
A:admit
B:survive
C:prove
D:relate
自然界中,相邻河系在内外因素的影响下,会有一个河系发展成为主河系。由于分水岭被破坏或迁移造成的河流袭夺,称为主动河流袭夺。图乙是“图甲中方框处的分水岭迁移图”,该处分水岭从Ⅰ经Ⅱ到Ⅲ,分水岭最终被切穿,发生河流袭夺现象。图乙中导致分水岭迁移的主要外力作用是( )