A-A+
What is true about the Cretaceous crisis accor
问题详情
What is true about the Cretaceous crisis according to the author？
A．It was the most famous devastating extinction episode in history.
B．It is the most devastating extinction episode up until now.
C．It was less devastating to species diversity than is the current biodiversity crisis.
D．The dinosaurs comprised the great majority of species that perished during the crisis.
参考答案
正确答案：A
解析：定位于第二段倒数第二句“但是白垩纪的灾难与2.4亿年前二叠纪的灭亡不可相提并论，在此期间，约有77%至96%的动物物种濒临灭亡”，从而排除B ，再根据倒数第三句“发生在白垩纪的大灭绝是五次大灭绝中最有名的一次，它结束了恐龙时代，将霸权地位让给了哺乳动物，因此最终使人类主宰地球成为可能”，由此可排除D ，确定答案为A 。而C 文中并未提到。
