#2008年职称英语考试理工类(C级)真题及答案5 搜索结果
第三篇SunspotsIt’snotsurprisingthatsunspots(太阳黑子)wereobservedbyancientastronomers(天文学家).Thelargestsunspotsonthesuncanbeseenwithoutatelescope.Itwasnotuntilthe.inventionofthetelescope(望远镜)intheea
