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Miss Hill taught physics in a school in London.She was explaining to one of her classes about sound,and she decided to test (测验) them to see haw well she had been in her work.She said,"Now,I have a sister in Washington.If I was call?ing her on the telephone,and at the same time you were 25 metres away,and listened to me from the other side of the street,who would hear me first,my sister or you?And why?" :
The cleverest boy answered at once,"Your sister,Miss Hill,because electricity (电) travels faster than sound waves (声波)."
"That's very good," Miss Hill agreed.But then one of the girls put up her hand,and Miss Hill said,"Yes,Kate?"
"I don't agree," Kate said."Your sister would hear you earlier because when it's.11:00 here,it is only 6:00 in Washington."
3q
人气:343 ℃ 时间:2019-08-20 09:49:02
解答
Hill小姐在伦敦的一所学校里教物理.她向她的一个班级解释声音(的原理),她想做个测验来检测她这堂课的效果.她说“现在,我有一个姐姐在华盛顿.如果我打电话给她,与此同时你站在离我25米远的地方,从街的另一头听我讲...
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