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标题: 四级练习2015.08.20 [打印本页]

作者: Rebecca949    时间: 2015-8-21 14:50     标题: 四级练习2015.08.20

[audio]http://sound.yywz123.com/tingbbs/cet4/cet420150820.mp3[/audio]



Professor Wang is a physics teacher in Beijing. Once she was explaining to one of her classes about sound. (1)_________________________. "I have an uncle in Xinjiang," she said, "Suppose I was calling him on the phone from here and at the same time you were 25 metres away, listening to me. Who would hear me first, my uncle or you - and for what reason?" Ma Hua at once answered, "Your uncle, professor,(2)_____________________." "Good," said the professor, but then another boy raised his hand. "Yes, Li Ming?" said Professor Wang. "Of course your uncle would hear you first," Limin said, "but that's because of the time difference. (3)___________________________."




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作者: longyuan    时间: 2015-8-25 13:53

should decide to test the students to see how well they understood her
because tele-wave travel slower than electrity
when it is nine oclock,it is seven oclock in Xinjing.




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