Migration is usually defined as "permanent or semipermanent change o f residence"."This broad definition, of course... [查看全文]

There are some earth phenomena you can count on, but the magnetic field, someday is not of them. It fluctuates... [查看全文]

下面是2015年英语专四阅读理解练习(4)，供考生参考。Three English dictionaries published recently all lay claim to possessin... [查看全文]

　　Nature's Gigantic Snow Plough　　On January 10, 1962, an enormous piece of glacier broke away and tumbled ... [查看全文]

　　As the merchant class expanded in the eighteenth?century North American Colonies, the silversmith and the coppe... [查看全文]

　　People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people wh... [查看全文]

　　提高阅读理解能力，在平时的练习中有几个方面需要注意，而在考试过程中也有技巧可以遵循：　　在平时学习过程中，学生应注意以下几个方... [查看全文]

英语专四考试阅读项目是对考生在英语阅读能力方面的检验，要求学生在考试中充分展示自己真实的阅读水平 [查看全文]

　　This week Wal-Mart is set to announce a major initiative aimed at helping cotton farmers go organic: it will... [查看全文]

　　Organized by the New York-based nonprofit Earth Pledge, the show inspired many top designers to work with sus... [查看全文]