单词：microphone carbon powder
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Half Duplex Half duplex is a transmission path capable of transmitting signals in both directions, but only in one direction at a time. HDLC high-level data link control Header The header is control i
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This is Scientific Americans 60-Second Science, I'm Cynthia Graber. This will just take a minute. In vitro fertilization(试管受精) efforts can be helped by oddly enough oral contraceptives .That's the finding from Tel Aviv University, site of the
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This is Day to Day from NPR news, I am Medlin Bran. Have you ever wondered just who runs the Internet? Well a non-profit organization here in the US is responsible for technical oversight, but lately there's been some loud protests from other countri
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Kyoto Protocol Winds Down As Delegates Head To Doha As delegates from 190 countries head for Doha to try to forge a new deal on tackling global warming, the Kyoto Protocol - signed in 1997 - is due to expire at the end of the year. That deal sets bin
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After four years of negotiations, representatives of 135 nations have unanimously agreed on the text of a protocol to end the illicit trade in tobacco products. Nations are expected to adopt the protocol, the first under the WHO Framework Convention
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BEIJING, Dec. 25 (Xinhuanet) -- China is likely to test a new Internet protocol in the next few years in an attempt to further develop the country's Internet, senior officials from the State Council said on Friday. The country will put the Internet P
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