2018_2019版高中英语Unit1TalesoftheunexplainedPeriodOneWelcometotheunit.doc
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1、1Unit 1 Tales of the unexplainedThere are many people who often discuss whether aliens(外星人) are real or not.There are also some different stories about aliens.Do aliens really exist in space?When you think of aliens,what comes to your mind?Whatever pictures we have of aliens in our mind is due to th
2、e influence from newspapers,the Internet and the TV.There could be life forms as tiny(极小的) as some microorganisms or as large as giant dinosaurs.Scientists argue that the universe is far too huge and it is very unlikely that only our planet can support life.There must be other planets which support
3、life but are unknown to us.One of the organizations working on outer space life is SETI.Astrophysicist(天体物理学家) Carl Sagan believes the presence of life outside the Earth.Frank Drake,founder of SETI,is another scientist who has devoted his life to providing the presence of life outside the Earth.Many
4、 other research projects have been and are still being carried out to collect evidence of life outside the Earth.In fact,Bruno DArgenio and Giuseppe Geraci have found evidence of life in 4.5 billionyearold meteorites(陨石)Just as there are people who support the existence of life outside the Earth,the
5、re are others who think of it as a farfetched idea.They argue,if there is life outside the Earth,why have we not been able to get any hard evidence till today?2根据上文判断正(T)误(F)1The scientists are sure that there are some aliens outside the Earth.(F)2People have different opinions on whether there is l
6、ife outside the Earth.(T)Period One Welcome to the unit their strong immune systems that can defend against Ebola,a deadly virus; and their relatively long lifespans.“The genomes of all these other species,like birds and mice,are wellunderstood, ” says an expert at the Max Planck Institute for Psych
7、olinguistics in Nijmegen,the Netherlands.“But we dont know anything about bat genes yet.”“Some bats show babbling behavior,including barks,chatter,screeches,whistles and trills, ”says Mirjam Knrnschild,a behavioral ecologist at the Free University of Berlin.“Young bats learn the songs and other soun
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