若将抛物线y=2x²先向左平移2个单位，再向下平移1个单位得到一个新的抛物线，则新抛物线的顶点坐标是

    “Who needs a shopping mall (购物中心)if you have Taobao?”says Wang Lin,28,a writer in Beijing.
    Taobao, China’s largest online shopping site （网上购物网站）,has become an important part of Wang Lin’s life. She spends lots of money on Taobao.
    A growing number of Chinese Internet users like Wang have found the joys of online shopping .Most online shoppers are students or young workers .More women shop on line then men. Clothing and home-use products（产品）are the most popular on line.
    It was reported that more than 250 billion（十亿）Yuan was spent on online shopping last year,80% through Taobao.
    Taobao means “looking for treasure” in Chinese. People can find almost everything they need on Taobao, from clothes to books, from candies to DVD players.
    You may question the security of online shopping ,Wang Lin said, “It's very safe and convenient ( 便利的).Unless you receive the products from the sellers and are satisfied with them, the shop owner will not get the money .You can also get your money back if you want to return the products.”

1973年6月，陈云曾就当时的国际经济贸易做出重要谈话：“过去我们的对外贸易是百分之七十五面向苏联和东欧国家，百分之二十五对资本主义国家。现在改变为百分之七十五对资本主义国家，百分之二十五对苏联、东欧。”“这个趋势是不是定了？我看是定了。因此，我们对资本主义要很好地研究。”陈云得出上述认识的有利的形势变化是（    ）

小李同学找到几则关于美国历史的材料，不甚理解，请你参与分析。

材料一：美利坚民族并不是北美大陆的首批开辟者，但经过100余年的开拓却构成了美洲领土最大的国家；虽然美利坚合众国不是第一个进行资产阶级革命的国家，但到了19世纪末工业总产值居世界第一。

材料二：美国总统奥巴马说：“美国的真正天赋在于，它懂得改变”。