President Barack Obama is calling for reforms in the way Americans pay for a college education. The president made his appeal Friday before an audience of students at the University of Michigan. 美国总统奥巴马呼吁美国人上大学的学费要

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Summer Breeze, Makes Me Feel Fine 风是大家最熟悉的自然现象,要了解风的形成必须了解包围着地球的大气的运动。大气的流动也像水流一样是从压力高处往压力低处流。太阳能正是形成大气压差的原

发表于:2019-03-09 / 阅读(199) / 评论(0) 分类 英语听力文摘 English Digest