第一篇 Captain Cook Arrow Legend It was a great legend while it lasted, but DNA testing has ____1_____ ended a two-century-old story of the Hawiian arrow...
Water Fromthebeginning,waterhasfurnished供给manwithasourceoffoodandahighwaytotravelupon.Thefirst_______1_______arosewherewaterwasadominantelementinthee...
OneGoodReasontoLetSmallpoxLive It’snowaffairbetthatwewillneverseethetotalextinctionofthesmallpoxvirus.Theideawastocapthegloriousachievementof1980,whe...
Animal’s “Sixth Sense”A tsunami was triggered by an earthquake in the Indian Ocean in December, 2004. It killed tens of thousands of people in Asia an...
第五篇 Singing Alarms Could Save the Blind If you cannot see, you may not be able to1 find your way out of a burning building—and that could be fatal. A...
第六篇：Car Thieves Could Be Stopped Remotely遥远地Speeding off超速行驶 in a stolen car, the thief thinks he has got a great catch2. But he is in a nasty3 surpri...
第七篇(新) AnIntelligentCarDrivingneedssharpeyes,keenears,quickbrain,andcoordinationbetweenhandsandthebrain.Manyhumandrivershaveall____1____andcancontrol...
第八篇 A Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells _____1___ w...
第九篇： Wonder Webs Spider webs are more than homes, and they are ingenious traps. And the world’s best web spinner may be the Goldern Orb Weaver spider....
第十篇： Less Is MoreIt sounds all wrong—drilling holes in a piece of wood to make it more resistant to knocks. But it works because the energy from the b...