Which came first: Homo habilis or Homo erectus? How did humans evolve from Neanderthals? What is the first species of humans found outside Africa? What hominids evolved into Homo erectus? Where were dinosaurs first discovered? Where did Australopithecus africanus live?
【1】细节理解题,根据第一段“she’s found the answer: river valley in the African country of Botswana (博茨瓦纳).”可知海耶斯人类的来源是在博茨瓦纳。故选B。【2】细节理解题。根据“This type of DNA is only passed down from mother to child.”可知他们研究这种基因是因为这种基因只会从母亲传给...
As Dave Goulson, professor of biology, points out in his bookSilent Earth, insects are, about three - quarters of all crops grown by humans require pollination by insects. "We could not feed the global population without pollinators," he writes. Yet, bees and butterflies, the beautiful ...
At first, we created a few “masterpieces" in the first year. Eight of us shared a room and none of us was willing to clean the floor, so the floor changed from bright white into dark gray. And so often were we invited to the t...
[04:16.04]Homo sapiens was not the first human species [04:18.60]to live outside of Africa - [04:20.80]including the area surrounding the hub. [04:24.40]Ancient intermixing by modern humans [04:27.36]has left small traces o...
Hostility to Gypsies has existed almost from the time they first appeared in Europe in the 14th century. The origins of the Gypsies, with little written history, were shrouded in mystery. What is known now from clues in the various dialects of their language, Romany, is that they came from...
The Black Robin⑩robin n.知更鸟案例研究黑知更鸟lack robins are the birds that humans saved from是人类从灭绝危机extinction. In 1980, there were only five black robins中拯救出来的鸟类。1980left in the world. They all lived on a small island off the年,世界上只剩下五只黑知更鸟。它们栖息在...
课文注解 原文呈现 课文译文① species /'spi:fi:z/ n.物 Extinctions, where entire species① are wiped 物种灭绝,即某个物种的完种,种 out,{② are not unusual in our Earth's history. In 全消失,在地球的历史上并不写②wipe /waIp/ vt.擦;拭 fact,over 90 percent of all species that ever ...
Humans are nearly hairless , too.Instead of fur . we wear coats when were cold and shorts when we're hot . We heat our homes during winter and cool them during summer . Like these other mammals , we've adapted to live without( much ) hair ...
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