单词：pettit
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This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. This will just take a minute. Youve probably chased a fly or two around the house this summer. And, chances are, it took a few swings before you brought down the buzzing nuisance.
Scientific American(八)月
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北美小学生英语一年级教材（牛津英语教材）
World Hepatitis Day is observed on May the 19th. It aims to increase awareness worldwide of the diseases hepatitis B and hepatitis C. Its hope is to encourage the prevention and diagnosis of these two diseases, and increase the number of people who r
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Helen: Hello, welcome to Real English from BBC Learning English. Im Helen. Oliver: 嗨，我是 Oliver。 Helen: Today were going to look at words and phrases that you might not find in your dictionary. Oliver: 地道英语和大家一起学习现代英式英语中经常出
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Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol
Scientific American(八)月
高考就快来临了，阿美在准备做最后的冲刺。这不，下课了她还在复习。好朋友古奇劝她早点休息，结果怎样呢？ Listen Read Learn Gucci: I've almost finished today's task. I gotta go home and have a good sleep. Oh, I haven't got enough sleep since the beginnin
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The U.S. Special Inspector General for Iraq Reconstruction has criticized the State Department for its management of nearly $3 billion in contracts and grants in Iraq. In two reports, auditors cited weak and ineffective State Department oversight of
VOA标准英语2010年(一月)
Everyone needs a pet. Its really cool to look after an animal of some kind, or even a bird or insect. Ive always had pets. When I grew up, we had three dogs, five cats, a tortoise and loads of rabbits. I lost count of the number of rabbits we had. Pe
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Tit for Tat针锋相对An American lady traveling in England some years ago, got into an compartment of a smoking carriage where an Englishman was smoking a pipe. For a short time she sat quietly expecting that the Englishman would stop smoking. But
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72 约翰斯·霍普金斯疟疾协会 DATE=7-19-01 TITLE=SCIENCE REPORT - Johns Hopkins Malaria Institute BYLINE=Jill Moss (Start at 01'0
科技之光
Offering Substitute 提供代用品 Specimen Letters1. Offering Rayon in Place of Watered Silk提供人造丝代替水洗丝Dear Sirs,Thank you for your fax of yesterday (April 3) with your order No.456 for 5,000 metres of 100cm wide watered silk. We
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[全屏观看] 点击右键- 另存为 可保存这个Flash影片 本游戏为开房间式的网络休闲游戏MMO Casual Game，采用即时制。像现在已经运营的《泡泡堂》等都属于这一类型。它的特点是允许众多的客户端
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