2014年中央电大本科机械CAD／CAM阅读理解及编程汇总小抄参考.doc

专业好文档阅读理解题1：绘出在autocad编辑状态中下述文件在屏幕上显示的对话框内容（填入图中）答案：编程题1：用autolisp语言编写一个名为“tuxing”的自定义函数。要求执行此函数时使用键盘输入一个圆的圆心坐标和半径值，然后自动绘出该圆两条中心线并自动绘出中心与该圆同心的正方形（边长等于圆的半径）阅读理解2：绘出下述文件所描述的对话框在屏幕上显示的内容答案：编程题2：用autolisp语言编写一个名为“tuxing”的自定义函数。要求执行此函数时使用键盘输入两个同心圆的圆心坐标和每个圆的半径值，然后自动绘出这两个圆和与圆同心的正方形（边长等于大圆的直径）阅读理解3：在autocad编辑状态中运行函数图时，分别用文字描述在屏幕图形区和文本区的显示结果，程序如下：答案：编程题3：用autolisp语言编写一个名为“tuxing”的自定义函数。要求执行此函数时使用键盘输入两个同心圆的圆心坐标和每个圆的半径值，然后自动绘出这两个圆和水平、垂直的两条中心线。编程题4：用autolisp语言编写一个名为“tuxing”的自定义函数。要求执行此函数时使用键盘输入一个同心圆的圆心坐标和半径值，然后自动绘出该圆、两条中心线和一个正方形（该正方形由该圆与中心线的四个交战的连线组成。）阅读理解4：写出在autocad编辑状态中运行函数tu时，在屏幕图形区和文本区的显示结果。答案：阅读理解5：绘出在aitocad编辑状态中下述文件在屏幕上显示的两级下拉菜单的内容。答案：阅读理解6：读懂以下dci.文件，填画出在autocad编辑状态下，以下dci.文件被正确加载执行后滚动条的正确位置，以及屏幕上所显示的对话框内容（填入图1-1中）答案：编程题5：用autolisp语言编写一个程序，该程序在给定的两条线间通过输入倒角角度及倒角距离生成一个倒角，如图1-2所示。答案：if we dont do that it will go on and go on. we have to stop it; we need the courage to do it.his comments came hours after fifa vice-president jeffrey webb - also in london for the fas celebrations - said he wanted to meet ivory coast international toure to discuss his complaint.cska general director roman babaev says the matter has been exaggerated by the ivorian and the british media.blatter, 77, said: it has been decided by the fifa congress that it is a nonsense for racism to be dealt with with fines. you can always find money from somebody to pay them.it is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. it is all nonsense.we can do something better to fight racism and discrimination.this is one of the villains we have today in our game. but it is only with harsh sanctions that racism and discrimination can be washed out of football.the (lack of) air up there watch mcayman islands-based webb, the head of fifas anti-racism taskforce, is in london for the football associations 150th anniversary celebrations and will attend citys premier league match at chelsea on sunday.i am going to be at the match tomorrow and i have asked to meet yaya toure, he told bbc sport.for me its about how he felt and i would like to speak to him first to find out what his experience was.uefa hasopened disciplinary proceedings against cskafor the racist behaviour of their fans duringcitys 2-1 win.michel platini, president of european footballs governing body, has also ordered an immediate investigation into the referees actions.cska said they were surprised and disappointed by toures complaint. in a statement the russian side added: we found no racist insults from fans of cska.baumgartner the disappointing news: mission aborted.the supersonic descent could happen as early as sunda.the weather plays an important role in this mission. starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. the balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. it will climb higher than the tip of mount everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. as he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.the balloon will slowly drift to the edge of space at 120,000 feet ( then, i would assume, he will slowly step out onto something resembling an olympic diving platform.below, the earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. it will be like he is diving into the shallow end.skydiver preps for the big jumpwhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to earth. but this will not be enough to stop him completely.if he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. his team hopes its not needed. instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).in order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). he will have a reserve parachute that will open automatically if he loses consciousness