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Background Knowledge u Time Zones and International date Line rn 1884 scientists divided the world into 24 time zones. The time in the zone containing greenwich is called Greenwich Mean Time Going westwards around the world from Greenwich, we subtract an hour for each
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Background knowledge Four steps one has to go through in looking for a job: a. Look for a post in newspapers, on TV, etc. b. Write a formal application to the target company and follow up with a call C. Get an answer from the company d. Be interviewed by the company
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Translation(English to Chinese) 1. I was greatly impressed by its natural beauty when I took a study tour there two years ago 两年前,我在那里做过野外考查,那里的自然风光给我印象极深
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When Laura reached school-going age the discussions about moving became more urgent Her father did not want the children to go to school with the village children and for once her mother agreed with him. Not because, as he said, they ought to have a better education than they could get at Lark Rise; but because she feared they would tear their clothes
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1.1.1 Autocad2002今日 我的图形:打开图形、创建图形、符号库三个选项卡 1.打开图形 选择开始方式:最近使用过的图形、日期、文件名、 文件位置
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一、模型空间: 绘图时缺省状态是在模型空间中进行,一般在该 空间进行二维、三维绘图及标注。 可使用一个或多个平铺视口来显示模型的不同视 图,当设置多视口时,只有一个为当前视口
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尺寸的组成和类型: 尺寸:由尺寸线、尺寸界限、尺寸起止符号和 尺寸数字组成。 Auto CAD提供了12种标注形式。 尺寸的标注方法: 首先创建一个存放尺寸的标注的新图层;
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有两种坐标系,一种是世界坐标系(Wc: world coordinate system),这种较常用;另一种是用户坐 标系(UCS),这种常用于较复杂的图形。 坐标:动态与静态,默认为动态直角坐标。F6或 Ctrl+D可切换。状态栏右击:利用快捷菜单可选择显 示方式
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调用:a.菜单:绘图\\图案填充; b命令: BHATCH或BH或H; C.工具栏:图案填充。 对话框选项说明: (1)快速选项卡:快速地创建填充图案。 类型:有三种方式;
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有世界坐标系(WCS):图标中有“W\,表 示当前坐标系为WCS。这是系统的缺省设置 用户坐标系(UCS):图标中没有“W”,表示 当前坐标系为UCS. .三维坐标:这是一种固定坐标系
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