2022军队文职人员招聘-军队文职英语言文学考前拔高名师测验卷24(附答案解析)
11页1、2022军队文职人员招聘-军队文职英语言文学考前拔高名师测验卷(附答案解析)1. 问答题:指南针的发明源于中国。2000多年前的战国时期,人们利用磁铁在地球磁场中的南北指极性发明了指南针的雏形,称之为“司南”。它用天然磁石制成,样子像一把勺子,底部为圆形,可在平滑的“地盘”上自由旋转,待旋转的磁勺慢慢停止下来时,勺柄就指向南方。磁石的硬度为5.56.54。900年前的北宋时期,人们把一片薄铁皮剪成约7厘米长,1.5厘米宽的鱼形,放在炭火中烧得通红,然后用鱼嵌夹着鱼头,让鱼尾正对着地球磁场方向。这样,铁鱼内部被烧得处于活动状态的磁畴就顺着地球磁场方向排列,再把磁化后的铁鱼迅速浸入冷水中,磁畴的规则排列就马上固定下来。这时,再把小鱼浮在水面平静的碗中,鱼头鱼尾就可以指南北了。在使用指南针的过程中,人们不断地改进,不断地摸索,使指向仪器在外形上终于成为最简便的针形。人们拿一根小钢针在磁石上反复摩擦,待钢针磁化后,便是指南针了。在此基础上,以后人们发明了更为先进的罗盘。指南针首先是风水先生发明和使用的。北宋时期,指南针应用于航海事业中,使之有了经久不衰的生命力。北宋前,航海者是利用日月星辰的位
2、置来判定方向。这种方法在天晴时尚可运用,一旦阴雨天,航海者的命运就难以把握了。自从有了指南针,它为航海者带来极大的方便,成为航海家的必备之物。郑和七次下西洋,哥伦布对美洲大陆的发现和麦哲伦的环球航行,都与指南针的应用分不开。答案: 本题解析:The compass was invented in China.Two thousand years ago, during the Warring States Period (475 B.C.221 B.C.) in China, the Chinese invented “Sinan”, an embryonic form of compass, which made use of the magnets property that it always orients itself north and South in the magnetic field of the earth. It was made of natural magnetic lodestone and it looked like a spoon with a ha
3、rdness of 5.56.5. Its bottom was round and so it could spin freely on the tray on which it was placed. When the revolving spoon slowed down and came to a stop, its handle pointed to the south.Nine hundred years ago, in the Northern Song Dynasty (960 A.D.1127 A.D.), the Chinese made a thin iron sheet shaped like a fish, which was 7 cm in length and l.5 cm in breadth. It was heated red hot in a charcoal fire. The fish head was then gripped with a pair of tongs and the fish tail was turned to the d
4、irection of the magnetic field of the earth. The moving magnetic domain inside the hot fish was thus aligned in the same direction as the magnetic field of the earth. The magnetized fish was then put suddenly into cold water, thus fixing the magnetic field in the fish. Therefore, when the fish was floated on still water in a bowl, the head of the fish pointed to the south and the tail to the north. Over years, this fish-shaped device gradually evolved into the more simple and convenient form of
《2022军队文职人员招聘-军队文职英语言文学考前拔高名师测验卷24(附答案解析)》由会员夏**分享,可在线阅读,更多相关《2022军队文职人员招聘-军队文职英语言文学考前拔高名师测验卷24(附答案解析)》请在金锄头文库上搜索。
纳税人办理各类税务事项申请书模板(DOC41)
初二语文短语专项训练试题及答案
2021年我的中国梦:我的童年
2023年调研员个人工作计划(2篇).doc
变色龙教学反思
苏州生态文明建设调研报告
2022年高二生物上学期第一次9月月考试题
简单的美术教师教学工作总结例文(二篇).doc
2022年办事处工作计划
z锅炉爆管应急预案129
文化综合大纲解读,2013年重庆政法干警考试
年度话务员工作总结样本(2篇).doc
服装销售上半年工作计划范文(四篇).doc
办公室主任岗位职责(七篇)
秋天的雨教案
2023办公室内勤的下半年工作计划范本(3篇).doc
有关自来水作文4篇
精选电话客服年度个人工作总结(4篇).doc
2023年购房合同电子版(8篇)
Gettysburg Address 林肯葛底斯堡演说 中英对译版
2023-04-15 22页
2023-01-10 6页
2023-12-24 28页
2023-09-07 16页
2022-07-18 80页
2022-07-17 11页
2024-01-18 15页
2023-12-04 18页
2023-09-11 28页
2024-01-29 13页