危险是事故可能性与事故严重性的结合，所以（）

A.事故的可能性增大1倍，危险就增大1倍。

B.事故的严重性增大1倍，危险就增大1倍。

C.事故严重性越大，危险就越大。

D.当事故严重性相同时，危险与事故可能性无关。

Animals that could not ____ themselves to the changed environment died and those that could survived.   

A．change

B．adapt

C．devote

D．match