(1)列车从福鼎到上海虹桥所用时间为: 14:14-9:14=5\,\rm h ...2分 (2)列车从福鼎到上海虹桥的平均速度为: v={s\over t} ={683\,\rm km\over 5\,\rm h} =136.6\,\rm km/h ...4分 (3)动车的速度为: v'=198\,\rm km/h=55\,\rm m/s ...5分 动车60\,\rm s通过的路程为:...
The small-scale dynamo is typically studied by assuming that the correlation time of the velocity field is zero. Some authors have used a smooth renovating flow model to study how the properties of the dynamo are affected by the correlation time being nonzero. Here, we assume the velocity is...
南天山冲断褶皱系是中-上新世以来形成的以薄皮滑脱为主的冲断构造,冲断作用导致了盆地内及周缘区古-新生界的碎屑岩和碳酸盐岩地层发主形变。本文对该冲断系前缘区(巴音库鲁提北部至喀什地区)的运动学特征进行了研究。rn 南天山冲断褶皱系从平面上分出了六个冲断褶皱带。从剖面上划分出两种不同的冲断体系。冲...
12月19日,李连杰带19岁大女儿Jane参加巴黎名媛舞会,老父亲显然很为女儿骄傲,高兴得晒出了多张合影照片,满脸笑容超幸福啊!近日已经沉寂了许久的李连杰,偶尔露面似乎都离不开女儿啊,看来老父亲也是要为两个优秀的女儿铺路了。 与大女儿Jane合照,19岁的她从小...
本发明公开了一种蓝莓果脯的生产加工方法,该方法包括:原料挑选、清洗、漂烫、护色、硬化、高温渗糖、低温浸糖、沥干、干燥。本发明加工制作出的蓝莓果脯渗糖均匀,含糖量低至40%-50%;蓝莓果脯颗粒饱满、柔软、口感好、酸甜适中,具有天然的蓝莓果香味;蓝莓果... 杨鹤亭 被引量: 0发表: 0年 ...
摘要: 前两年,在一些地区,一些学校,曾经流传"灰色儿歌",引起有关教育部门,宣传部门的重视.北京市首先组织,编写,出版了《北京新童谣》,胡锦涛,李长春等国家领导人专门作了批示.接着,许多省,市,区纷纷出版本地区的儿歌,童谣集.我也应邀关键词:儿歌 灰色 艺术性 流传 说教 父母 启示 思考 接受 空洞 ...
PURPOSE:To improve dielectric strength characteristics of a Schottky barrier rectifier in which a guard ring is provided without degrading forward characteristics by making the thickness of a part of an effective epitaxial layer directly under the bottom of the guard ring practically thick. CONSTITUTION...
Gene-environment (G×E) interaction plays a pivotal role in understanding the genetic basis of complex disease. When environment factors are measured in a continuous scale, one can assess the genetic sensitivity over different environmental conditions on a disease phenotype. Motivated by the increasing...
Regardless of whether a pregnancy ends in abortion, miscarriage or ectopic pregnancy, fertility and sexual activity can resume quickly. For those who do not plan to become pregnant again immediately, effective contraception is therefore required. Although a contraceptive discussion and the offer to prov...
FLUID-BASED EXCAVATING 来自 掌桥科研 喜欢 0 阅读量: 16 申请(专利)号: CA19912078688 申请日期: 1991-03-14 公开/公告号: CA2078688A1 公开/公告日期: 1991-09-23 申请(专利权)人: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY 发明人:WP Croager,TJ Smith ...