给下列词语中加线的字选择正确的解释。7P*E:@0A(\6t
A、不安全 B、损害 C、端正 D、高7P*E:@0A(\6t
①危峰兀立请选择ABCD8N*n,{/d2k)m8u7P*E:@0A(\6t
②危及生命请选择DCBA2n-{)[3J5k0a9F.l*?3P0G7P*E:@0A(\6t
③居安思危请选择DCBA+U)T0o'V;o9k2_(n(J0M-^7P*E:@0A(\6t
④正襟危坐请选择ABCD'K9Y*[8d*p2R7|7P*E:@0A(\6t