李子核     

列·托尔斯泰 《今日小学生B版》2003,(6)

母亲买了一些李子回来,打算吃过午饭后分给孩子们吃,这些李子就放在盘子里。万尼亚从没吃过李子,他闻了闻,心里非常喜欢这些李子,很想尝(cháng)尝李子的滋(zī)味。他在  相似文献   

猴子和海豚     

列浩辉 《少年作文辅导(中学版)》2005,(Z1)

100多年前,美国人制造了船,可船上什么娱乐设施也没有,于是,有些人带了猴子上船,供大家玩乐、解闷。有一天,人们和往常一样乘船出海,猴子也照常在船上的钢丝绳上耍杂技。忽然,天空乌云密布,一道雷电打下来,正好击在船上。不一会儿,船歪了,看样子,船很快就会沉入海里。船上所有的人都急急忙忙地乘救生船逃生去了。猴子跳到海里,被一条海豚救了。那海豚听说人类是一种有超强智慧的动物,很想见识一下,却万万没有想到自己救的是一只猴子,他把猴子当成了人。猴子趴在海豚身上,海豚一边快速地游着,一边问猴子:“朋友,你知道墨西哥吗?”“知道知道!…  相似文献   

Broken Promises     

Lorraine M.Gregoire  晓雾 《英语自学》2001,(3)

“Sheesh!Give me a few points for self control!”Isnapped at my cranky husband.I wanted to stop at a sport-ing goods store“Going Out of Business”sale we passed inthe mall.“There's nothing we need”,his usual grumpymale comment.“It's all overpriced junk.If they had anythinggood they wouldn't be going out of business.”  相似文献   

开罗夜未眠     

G.WILLOW WILSON 《海外英语》2007,(11):24-25

During the last few years, my neighborhood in Cairo has experienced such an influxof refugees from the Iraq war that longtime residents have begun, with a mixture of  相似文献   

俄罗斯中等职业教育改革     

A.M诺维科夫  师程梅 《世界职业技术教育》2001,(3):12-13

  相似文献   

Effect of boundary conditions and convection on thermally induced motion of beams subjected to internal heating     

MALIK Pravin KADOLI Ravikiran GANESAN N. 《浙江大学学报(A卷英文版)》2007,8(7):1044-1052

Numerical exercises are presented on the thermally induced motion of internally heated beams under various heat transfer and structural boundary conditions. The dynamic displacement and dynamic thermal moment of the beam are analyzed taking into consideration that the temperature gradient is independent as well as dependent on the beam displacement. The effect of length to thickness ratio of the beam on the thermally induced vibration is also investigated. The type of boundary conditions has its influence on the magnitude of dynamic displacement and dynamic thermal moment. A sustained thermally induced motion is observed with progress of time when the temperature gradient being evaluated is dependent on the forced convection generated due to beam motion. A finite element method (FEM) is used to solve the structural equation of motion as well as the heat transfer equation.  相似文献   

教育思想研究的新思维——评余立主编的《现代教育思想论纲》     

列红 《中国高教研究》1989,(2)

中国的教育已踏上了现代化进程。教育的现代化,有诸多任务,如教育制度的现代化、教育内容的现代化、教育方式的现代化、教育手段的现代化。然而,教育思想的现代化,应该是我国教育现代化过程中至关重要的课题。在一个国家里,  相似文献   

自密实混凝土和高性能混凝土在预制法施工中性能的比较研究     

ROUGEAU  MAILLARD  C.MARY-DIPPE  张金强 《石家庄铁路工程职业技术学院学报》2002,1(2):36-39

在混凝土预制厂中制作挡土墙时，对自密实混凝土(简称SCC)和高性能混凝土(简称HPC)进行了比较，试验表明，SCC某种情况下可以替代HPC。在试验室中进行的性能研究，包括材料的微观结构分析及与之相关的耐久性，尤其突出了一系列系数的测定(渗透性、氯化物的扩散性、碳化程度等)以及分别在有和没有防冻盐两种条件下的抗冻性。试验室条件下的试验结果，显示了SCC抵抗CO2和氯化物转移的良好性能。在研究中，SCC(尤其是BAP3)也显示了比HPC更加良好的抗冻性。  相似文献   

创造其实很简单     

泽水 《好同学》2003,(11)

世界著名的迪斯尼乐园,经过三年施工,马上就要时外开放了,然而各景点之间的路该怎样铺设还没有具体的方案。施工部打电话给正在法国参加庆典的格罗培斯大师,请他赶快定稿,以便按计划竣工和开放。  相似文献   

Stress analysis of anisotropic thick laminates in cylindrical bending using a semi-analytical approach   总被引：1，自引：0，他引：1  

LU Chao-feng LIM C.W. XU Feng 《浙江大学学报(A卷英文版)》2007,8(11):1740-1745

Semi-analytical elasticity solutions for bending of angle-ply laminates in cylindrical bending are presented using the state-space-based differential quadrature method (SSDQM). Partial differential state equation is derived from the basic equations of elasticity based on the state space concept. Then, the differential quadrature (DQ) technique is introduced to discretize the longitu- dinal domain of the plate so that a series of ordinary differential state equations are obtained at the discrete points. Meanwhile, the edge constrained conditions are handled directly using the stress and displacement components without the Saint-Venant principle. The thickness domain is solved analytically based on the state space formalism along with the continuity conditions at interfaces. The present method is validated by comparing the results to the exact solutions of Pagano’s problem. Numerical results for fully clamped thick laminates are presented, and the influences of ply angle on stress distributions are discussed.  相似文献