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銆€銆€The main problem in discussing American popular culture is also one of its main characteristics锛� it won‘t stay American.No matter what it is,whether it is films,food and fashion,music,casual sports or slang,it’s soon at home elsewhere in the world.There are several theories why American popular culture has had this appeal.

銆€銆€One theory is that it has been "advertised" and marketed through American films,popular music,and more recently,television.________1____ They are 锛宎fter all,in competition with those produced by other countries.

銆€銆€Another theory,probably a more common one,is that American popular culture is internationally associated with something called "the spirit of America." ____2____

銆€銆€The final theory is less complex锛� American popular culture is popular because a lot of people in the world like it.

銆€銆€Regardless of why it spreads,American popular culture is usually quite rapidly adopted and then adapted in many other countries._______3______ "Happpy Birthday to You锛�" for instance ,is such an everyday song that its source,its American copyright,so to speak,is not remembered.Black leather jackets worn by many heroes in American movies could be found ,a generation later,on all those young men who wanted to make this manly-look their own.

銆€銆€Two areas where this continuing process is most clearly seen are clothing and music.Some people can still remember a time when T-shirts,jogging clothes,tennis shoes,denim jackets,and blue jeans were not common daily wear everywhere.Only twenty years ago,it was possible to spot an American in Paris by his or her clothes.No longer so锛� those bright colors,checkered jackets and trousers,hats and socks which were once made fun of in cartoons are back again in Paris as the latest fashion.______4_______

銆€銆€The situation with American popular music is more complex because in the beginning,when it was still clearly American ,it was often strongly resisted.Jazz was once thought to be a great danger to youth and their morals,and was actually outlawed in several countries.Today,while still showing its rather American roots,it has become so well established.Rock ‘n’ roll and all its variations,country & western music,all have more or less similar histories.They were first resisted,often in American as well,as being "low-class锛�" and then as "a danger to our nation‘s youth." _______5_______ And then the music became accepted and was extended and developed,and exported back to the U.S……

銆€銆€绶寸繏(x铆)锛�

銆€銆€A.As a result,its American origins and roots are often quickly forgotten.

銆€銆€B.But this theory fails to explain why American films,music,and television programs are so popular in themselves.

銆€銆€C.American in origin,informal clothing has become the world‘s first truly universal style.

銆€銆€D.The BBC锛宖or example,banned rock and roll until 1962.

銆€銆€E.American food has become popular around the world too.

銆€銆€F.This spirit is variously described as being young and free,optimistic and cnfedent,informal and disrespectful.

銆€銆€鍙冭€冪瓟妗堬細BFACD

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銆€銆€The Columbia accident has revived the debate on whether the rewards of human space exploration are worth the risks No. I was a teacher when men first landed on the moon in 1969,and I remember how it moved my students and this country.(46)And we haven't ventured outward since then. That's 30 years too long!America's human space-flight program is adrift,with no clear vision or goals beyond the completion of the International Space Station.

銆€銆€I want NASA to establish a phased series of goals over the next 20 years,including human visits to asteroids that cross the Earth's orbit,establishing a research and living facility for humans on the moon,and human expeditions to the surface of Mars and its moons.(47)

銆€銆€An astronaut is today's Christopher Columbus,who sailed into the unknown and discovered the Americas. The knowledge we gain from having actual people exploring can never be replaced by robots.(48)Robots are useful,but humans can do things that robots can't.

銆€銆€The real obstacle we face in overcoming the drift in the nation's human space-flight program is not technological and it's not financial.(49)

銆€銆€The lesson from the Columbia accident is not that humans don't belong in space. (50)

銆€銆€A.Instead,we should honor the memory of the lost astronauts by pushing our exploration of space future.

銆€銆€B.Astronauts are key to this expanded exploration.

銆€銆€C.It's the lack of commitment to get started.

銆€銆€D.Until then,we should stop risking people's lives by sending them into space.

銆€銆€E.It is now more than 30 years since the last American left the surface of the moon and returned to Earth.

銆€銆€F.Our ability to send humans into space and have them return gives us amazing information about ourselves and our universe.

銆€銆€鍙冭€冪瓟妗堬細46. E 47. B 48. F 49. C 50. A

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