A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working wi
根据下面这首小诗，展开想像，将该诗改写为一篇短文。 古池 (日)松尾芭蕉 古池畔/青蛙一轻跃/水丁东 要求：①改写要充分尊重原文的意境的情趣；
The United Nations Educational, Scientific and Cultural Organization (UNESCO) officially _________ Chengdu to join its “Creative Cities Network”, making it the second city in the world and the fir
如图，E，F是平行四边形ABCD对角线AC上两点，AE=CF=AC．连接DE，DF并延长，分别交AB，BC于点G，H，连接GH，则的值为（ ） A．
按照体积计算空气中氧气约占 %，某化学兴趣小组的同学按照课本的实验装置做“测定空气中氧气的体积分数”实验（图1），但测出的氧气
下列各项中，对作品内容或情节的叙述有误的两项是 ( ) A.觉新是封建制度和传统习惯的牺牲品，同时又有意无意地帮封建势力制造着别人的悲
成语“螳螂捕蝉，黄雀在后”体现了生态系统中几种生物之间的捕食关系。如果该生态系统被某种有毒物质污染，一段时间后，哪种生物体内积累的有
“I still haven’t thanked Aunt Lucy for her present.” “It’s time you _____.” A. do B. did C. had D. would
表示实数
的小数部分，若
．则
． 
．
，则
，且
．
．
，其中
，
．∴ 
．