题目内容
(4分,每空2分)(1)用游标为20分度的卡尺测量某金属丝的长度,由下图可知其长度为 mm;
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250034227748055.jpg)
(2)用螺旋测微器测量其直径如右上图,由图可知其直径为 mm;
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250034227748055.jpg)
(2)用螺旋测微器测量其直径如右上图,由图可知其直径为 mm;
(1)50.15 mm;(2)4.700(4.698-4.700)
试题分析:(1)游标卡尺根据游标尺零刻度线左侧读出主尺上面毫米的整数部分即
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422789481.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422805506.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422820867.png)
(2)螺旋测微器首先读出固定刻度上面半毫米的整数倍即
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422852488.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422867395.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003422883477.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250034229301005.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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