英语学到一定程度,再进一步提高,学生会感到困难,这时候提高英语水平的主要障碍就是有限的词汇,所以在英语教学中应把词汇教学放在......

The effect of an external magnetic field on the preparation of silver nanowires was studied. The silver nanowires were s......

我不再迁徙　　我是一只生活在西班牙的白鹤。由于气候变暖，已绎不再迁徙。　　西班牙头号鸟类学家米格尔·费雷尔表示：过去几十年来......

本文研究了钙基蒙脱石吸附Cr~(3+)前后及不同温度热处理后产物的结构变化,运用了X射线荧光光谱法、X射线衍射术、傅利叶变换红外吸......

There has been an increasing need to migrate legacy systems to new hardware technologies and software development paradi......