【判断题】【消耗次数：1】
垄断厂商的平均收益曲线与边际收益曲线是同一条曲线。
①
正确
②
错误
参考答案：
复制
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【多选题】
切割型组合体多采用 ，绘图时要从最能反映物体 的图形开始作图。答案从下列选项中选择.1.形体分析法 2.线面分析法 3.形状特征 4.积聚性投影
①
1,4
②
2,3
③
1,3
④
2,4
【简答题】
作出平面ABCD的V面投影<img src="https://file.icve.com.cn/ssykt5/115/113/1CE1C586E3DA4B53B3D299F2985BE8EF.png"/>
【单选题】
平面的正面投影积聚为一条直线并与OX轴平行，该平面是（ ）。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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正平面
②
Normal
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7.8 磅
0
2
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水平面
③
Normal
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正垂面
④
Normal
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0
2
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铅垂面