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如果把一种精密的零件放大到原来的200倍，则画图时选用的比例尺是（ ）
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当两个零件要求精密配合时研磨是一种有效的加工方法
手表厂的技术人员设计新型的手表时想把手表的零件放大到原来的50倍则画图时选用的比例尺是
1：50
50：1
1：500000
王师傅加工1500个零件后改进技术使工作效率提高到原来的2.5倍后来再加工1500个零件时比改进技术
105
50
125
75
设某种零件的使用寿命服从参数为A的指数分布现在可以用两种方法生产这种零件．第一种方法生产的零件平均使
手表厂的技术人员设计新型的手表时想把手表的零件放大到原来的50倍则画图时选用的比例尺是
1：50
50：1
1：500000
一种精密零件实际长度只有2毫米画在纸上却有12厘米这张图纸的比例尺是多少另一种同样精密零件实际长度是
若画图时要把一种精密零件的长度放大200倍则选用的比例尺是1200．判断对错
某企业批量生产一种零件投产批量为5件经过4道工序加 工按照加工顺序单件每道工序作业时间依次为15分钟
130
200
325
350
一种微型零件的实际长度是1mm画在图纸上是3dm画图时选用的比例尺是
1：300
1：3
300：1
百分尺是利用螺旋传动原理制成的一种测量与检验零件尺寸的精密量 具
某厂准备加工700个零件在加工完毕200个零件以后采取了新技术使每天的工作效率是原来的2倍结果共用
某车间接到加工200个零件的任务在加工完40个后由于改进了技术每天加工的零件数量是原来的2.5倍共用
一种精密零件长2.5毫米用201的比例尺画图应画多长
选择零件的一组视图应达到目的
图形清晰、零件结构完整、画图简便
零件结构完整、画图简便
图形清晰、零件结构完整、画图简便、读图方便
图形清晰、结构完整、读图方便
如果把四边形ABCD的各边长都放大到原来的10倍则下列结论正确的是
∠
是原来的10倍B.周长是原来的10倍
面积是原来的10倍
面积是原来的20倍
某车间接到加工200个零件的任务在加工完40个后由于改进了技术每天加工的零件数量是原来的2.5倍整个
如果把一种精密的零件放大到原来的200倍则画图时选用的比例尺是
1：200
1：2000000
200：1
生产一种零件原来每个零件要2.4千克钢材改进工艺后每个零件可节省0.2千克原来生产440个零件的钢
生产一种零件原来每个零件需要2.4千克钢材改进工艺后每个零件只需2.2千克．原来生产880个零件的钢
百分表主要是用来测量和检查零件的偏差和偏差的一种精密量具
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