), elephants and other large mammals had the Earth to themselves. They grew to as much as twice as the size they are today, a new study shows.About 40 million years ago, mammals weighed up to 17 tons – huge ……

time the patients’ pee to find out whether (是否) they are healthy. Elephants let out huge farts... are very alert (警觉的). When people come close, they run away. So, most of the time, Kong can only ……

Jurassic mammal. The find shows that the ecological role of mammals in the time of dinosaurs was greater...A FURRY, beaver-like animal recently discovered in Inner Mongolia lived at the time of dinosaurs ……

study shows.About 40 million years ago, mammals weighed up to 17 tons – huge compared to today... land mammals. Standing 5.5-meter tall at the shoulder, the rhino would have towered over (大大高出) a huge ……

large mammals (哺乳动物) had the Earth to themselves. They grew to as much as twice the size they are today, a new study shows.About 40 million years ago, mammals weighed up to 17 tons – huge compared ……

A FOSSILIZED mammal discovered in China is possibly the great-grandmother of modern placental (有胎盘的) mammals, including human beings, say scientists. The fossil, dating back more than 130 million ……

all.The head of their pterosaur, Thalassodromeus, was topped with a huge bony crest. Similarities... reptile caught its dinner.The earliest pterosaurs appeared at about the same time as the first dinosaurs ……

of their huge size, but their slow heartbeat. For the first time, scientists have measured... it takes more time to pump blood (输送血液) around its body. Shrews (树鼩), the smallest mammals, have a heart ……

of teenagers is named after its preferred musicDay 3Big break for mammals (P5)Choose the best answer:1. The new study mentioned in the article shows that ______.A. the appearance of large mammals led ……

include rare species of wallaby (小袋鼠), bandicoot (袋狸) and other mammals, birds and reptiles (爬行... stronghold (据点) for many species of birds and mammals and reptiles,” Martin says. “The Kimberley region ……

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Bats (蝙蝠) can fly. Are they birds? No, they are mammals (哺乳动物). ……

of mammals, including humans. Back then, people’s experience told them that larger animals usually make...MOST of the time when you hear someone’s name, you can tell immediately whether he or she is a boy ……

brought them back to normal life.Scientists at the Fred Hutchinson Cancer Research Centre in the US reported their latest finding in the April 22 issue of the journal Science.This is the first time ……

brought them back to normal life.Scientists at the Fred Hutchinson Cancer Research Centre in the US reported their latest finding in the April 22 issue of the journal Science.This is the first time ……

YOU may have heard a dog or a cow fart (放屁), but can you remember the last time you heard a bird..., birds have the physical ability to pass gas. However, unlike humans and other mammals, birds don ……