The Earth is over 4 billion years old and the dinosaurs were dominant some 200-250 million years ago. It is safe to say that there was extensive life present on Earth before the dinosaurs as some of that life had to evolve into the dinosaurs....
二、1.were[解 ]状语many years ago, 的时态为一般过去时;由lots of dinosaurs可知,be动词 要用复数形式,故填were。 2.did[解 ]由时 状语yesterday可知,句子的时态为一 般过去时,故填助动词do的过去式did 3. feel[解 ]didn't接动 原形,填feel的原形 4.ate[解 ]yesterday morning, 时态为一般过去时...
What Earth Was Like Just Before the Dinosaurs?: The Permian-Triassic extinction a quarter billion years ago marks the beginning of the age of dinosaurs. But it was tens of millions of year later that life could get back to normal because the super contin
B. Were they destroyed by a deadly disease? C. Did small animals have a better chance of survival? D. Currently, scientists broadly agree on why dinosaurs disappeared. E. Even so, scientists have found soft tissue in dinosaur bones before. F. Such an event would be deadly to animals as...
If life is about survival of a species ─ and intelligence is meant to serve that survival ─ then we can't compare with pea-brained sea turtles, which were here long before us and survived the disaster that wiped out the din...
At one time, these were thought to represent embryonic animals, suggesting that this small dinosaur gave birth to live young rather than laying eggs. Further research indicated that the small dinosaurs were too large and too well developed to be prehatchling young. In addition, the juveniles ...
They flew to separate continents before losing their ability to fly independently through evolution.So, how did that happen? According to Cooper, it may have been a result of the extinction(灭绝) of the dinosaurs 65 million years ago. It was a time when dinosaurs were gone and other mammals...
What was the dominant species on Earth before dinosaurs? Was Spinosaurus a theropod? What animals lived in the Mesozoic era? What were the dominant trees of the Triassic and Jurassic? Were Ankylosaurus a kind of dinosaur? What did the Allosaurus eat?
dinosaurs9. A. baby B. young C. adult D. old10. A. in B. since C. before D.as 相关知识点: 试题来源: 解析 【文章大意】讲述了现在地球上最大的动物蓝鲸。1.【答案】B【解析】题意是:A. 脚 B. 尾巴 C. 手 D. 腿,现在地球上最大的动物是什么?是蓝鲸。一条成年蓝鲸从头到尾可以有...
Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during theMesozoic Era, the “Age of Reptiles.” Varying Size The largest dinosaurs were over 100 feet (30 m) long and up to 50 feet (15...