【单选题】【消耗次数：1】
下列关于圆球截交线说法有误的一项是（ ）。
①
当截平面与投影面垂直时，截交线圆在投影面上的投影为抛物线
②
当截平面与投影面平行时，截交线圆的投影反映实形
③
当截平面与投影面平行时，截交线圆的另二投影重影成长度等于该圆直径的直线段
④
当截平面与投影面倾斜时，截交线圆在投影面上的投影为椭圆
参考答案：
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【单选题】
当直线、平面与投影面平行时，该投影面上的投影具有( )
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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积聚性
②
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真实性
③
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类似收缩性
④
Normal
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0
2
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false
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ZH-CN
X-NONE
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收缩性
随机题目
【单选题】
《实施工程建设强制性标准监督规定》（建设部81号）规定：（）对违反工程建设强制性标准的行为有权向建设行政主管部门检举、控告、投诉。
①
A任何单位和个人
②
B任何单位
③
C公民
④
D监理单位