托福阅读备考长难句分析之白垩纪灭绝事件
很多考生觉得托福考试有用难度，但只要我们能好好备考，好好准备，相信许多考生都能取得好的成绩。出国留学网托福栏目为您整理托福阅读备考长难句分析之白垩纪灭绝事件，希望能有所帮助哦! Dinosaurs rapidly became extinct about 65 million years ago as part of a mass extinction known as the K-T event, because it is associated with a geological sign...