单词：cretaceous
n. 白垩纪, 白垩系
a. abounding in chalk
a. of or relating to or denoting the third period of the Mesozoic era
cretaceous的用法和样例：
例句
- The story takes place 6500 years ago in the late Cretaceous period.故事发生在6500万年前的白垩纪晚期。
- From the Cretaceous, Tarim basin began the new evolutional stage of foreland basin.从白垩纪初期开始
词汇搭配
- cretaceous白垩的
- cretaceous oil白垩纪石油
- cretaceous period白垩纪
- cretaceous oils白垩纪石油
- the cretaceous白垩纪或其岩石...
- white白色的
- milky乳状的
- chalky白垩的
- cretaceous period白垩纪
单词：cretaceous 相关文章
Their teeth were recurved which means they start to point backwards and they were also very blade-like and had serrated edges. 它们的牙齿后弯曲，这意味着它们开始指向后方，它们也是很像利刃边缘呈锯齿状。 Three tons
侏罗纪搏击俱乐部
Unit 43 What Caused the K-T Mass Extinction? The latter part of the Cretaceous Period was a time of continental drift and accompanying volcanic activity. The supercontinent was splitting up and the continents were taking on their modern-day forms. Ma
英语流行话题阅读：语境识词4500
考试日期： 2012 年 11 月 3 日 Reading Passage 1 Title: The dinosaurs footprints and extinction Question types: YES/NO/NOT GIVEN, Summary 文章内容回顾 文章从恐龙的脚印开始讲恐龙的灭绝。 英文原文阅读 Mass Extinction
雅思机经
Its unlike any other creature that has walked the planet. T-Rex is different. Something about Tyrannosaurs and Tyrannosaurus Rex itself is different than other predatory dinosaurs. But for such a celebrated killer able to take on the toughest creatur
探索与发现2013年
In a prehistoric world, theres a war waging between herbivores and carnivores, and the plant-eaters are winning. They seem to break all of the rules. Theres nothing like them around today. For these plant-eating giants, survival relies on a battery o
探索与发现2013年
I think that a big pterosaur on the ground wouldve been spooky because they would be moving around on all fours. Theyd probably have those sort of quick, precise movements like birds, but theyd be huge. Quetzalcoatlus lives by its own rules. Most mea
探索与发现2013年
Science and Technology 科技 Fossil feathers 羽毛化石 Not just for the birds 并非鸟类独有 A trove of fossils sheds light on the evolution of feathers 珍贵羽毛化石的发现能够更好地阐释羽毛的进化过程 THE fossil record i
经济学人科技系列
Science and technology 科学技术 Mass extinctions 大灭绝 Small but deadly 陨石很小不过危害却很致命 The biggest extinction in history was probably caused by a space rock that changed the climate 历史上规模最大的一次物种灭绝
经济学人科技系列