" 可知,有些恐龙像小鸡一样小,有些恐龙比双 层巴士还要大。 故选 B。 are dangerous to humans.(言之有理即可) 3.由“Dinosaurs lived on Earth millions of years ago."可知,填 millions。 4.由“But we can only see dinosaurs in museums now.”可知,我们现在只能在博物馆看到恐龙了。 反馈 收藏
Dinosaurs(恐龙)lived a long time ago before humans were around. Fossiles( 化石)tell us what shape they were. Little is known about their daily lives. Looking at what they ate helps us to know more about them. Scientists have found teeth marks of one dinosaur on the bones of another dino...
Were there dinosaurs in Ireland? Did Apatosaurus live in the Cretaceous or Jurassic? Were dinosaurs reptiles or birds? Are fossil fuels from dinosaurs? Were cavemen alive when dinosaurs lived? Did dinosaurs really exist? Was Tyrannosaurus rex an armored dinosaur?
New discoveries are changing long-held views of the biggest, meanest, and most bizarre animals that ever flew.
This is how big dinosaurs actually were in real lifeMonica ManaloSkye Gould
This helped dinosaurs and allowed them to live for so many years.Besides dinosaurs, there are other animals that are not completely warm blooded or cold-blooded, such as great white sharks.(247 words)Word Bank dinosanr['damas5:] n.恐龙cold-blooded ['kould'bladid] adi.冷血的ancient['ern...
The first animals on earth were never able to achieve much in the world because they lived in the sea, which provided limited oxygen, and they had no backbone. For ages there were many kinds of these animals living in the sea and on land. They differed widely from each other and ...
What year did dinosaurs exist? Non-bird dinosaurs livedbetween about 245 and 66 million years ago, in a time known as the Mesozoic Era. This was many millions of years before the first modern humans, Homo sapiens, appeared. What killed the megalodon?
Nitrogen isotope ratios have long been used to study the diets of modern animals and humans in hair, claws, bones, and many other organic materials. However, in fossil material, these measurements have previously been limited to samples that are only a few tens of thousands of year...
“Our results demonstrate that dinosaurs in the northern hemisphere lived in extreme heat, when averagesummer temperatures hovered around 27 degrees [Celsius]. As such, one can well imagine that there were summer days when temperatures crept above 40 degrees. However, winters were mild and wet,”...