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Tag questions are used when seeking confirmation of what one believes to be true. They restate, in question form, the previously spoken sentence. For example, He is an engineer. Isn't he? (Positive statement, negative tag) They're not from Colorado.
跟我学英语入门篇
d-Pinoresinoldi-O-b-glucopyranoside 松脂酚双吡喃葡萄糖甙 d-Pinoresinol d-松脂素 Piperitone 胡椒酮 Plantaginin 车前甙 Platycodin A, C, D 桔梗皂甙A，C，D Podophyllotoxin 鬼臼毒
医务英语
如果你知道chum表示“（男孩之间的）好朋友”的话，你也许会奇怪chum change（一笔小钱）这种说法与chum有何渊源呢？ 其实chum还有一个意思就是“鱼饵”，
英文语法词汇
By Meredith Buel Washington 16 May 2007 A U.S. military commander used an appropriate level of force and demonstrated sound judgment during a battle last month in Afghanistan that Afghan officials say killed dozens of civilians. That is the conclusio
2007年VOA标准英语（五月）
By Amberin Zaman Istanbul 14 April 2007 Thousands of Turks march towards Ataturk's mausoleum for a wreath laying ceremony in support of secularism after a rally in Ankara, 14 Apr 2007 More than 200,000 Turks protested in Turkey's capital Saturday aga
2007年VOA标准英语（四月）
By Sonja Pace London 02 November 2006 Former Iranian President Mohammad Khatami says American policies in Iraq and Afghanistan have led to an upsurge in terrorism and he called for a quick withdrawal of foreign forces from those countries. Mr. Khata
2006年VOA标准英语（十一月)