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Glatsmire's model shows that the magnetic poles swap places spontaneously due to / complex processes within the core. We were used to the idea that a compass points somewhere near the North Pole and hence we can use it for navigation, but there are p
自然百科2011年
ROME, May 26 (Xinhua) -- World record-holder Usain Bolt won his first race after a nine-month break on Thursday when he needed a late kick to win the 100 meters in 9.91 seconds at the Golden Gala. Former record-holder Asafa Powell, who led all the wa
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音乐咖啡厅:Beyonce联合Lady Gaga 性感出击Video Phone Artist：BeyonceLady Gaga Song：Video Phone Shawty, what your name is? Them hustlas keep on talkin' They like the way I'm walkin' You saying that you want me So press record, I'll let yo
音乐咖啡厅
But heres a mystery: When you press pause on the VCR, the screen doesnt go blank. Instead, you get a frozen image. Remember, you need a changing magnetic signal to create even a still video image. If the video tape isnt moving, where is this changing
英语时差8，16
Although audio tapes and video tapes look different, theyre based on the same principles. Each has a roll of magnetic material which slides past the so-called playback head in the VCR or cassette deck (cassette decks have one playback head, VCRs have
英语时差8，16
How Your VCR holds a Note VCR-盒式磁带录像机VCR是Video Cassette Recorder的缩写盒式磁带录像机。就功能上而言，它是使用空白录像带并加载录像机进行影像的录制及存储的监控系统设备。VCR作为许多晚会
英语听力文摘 English Digest