【单选题】
已知A、B、C三点坐标分别为(10、20、30)(20、40、60)、(30、60、90),则A、B、C三点______。
①
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EN-US
ZH-CN
X-NONE
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表示一个平面
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EN-US
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不能表示一个平面
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表示一个特殊位置平面
④
Normal
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7.8 磅
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false
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EN-US
ZH-CN
X-NONE
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无法判断
【单选题】
已知四点A(10、20、30)、B(30、20、10)、C(10、20、10)、D(20、20、30),则对H面的重影点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
A与D,D点可见
②
Normal
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7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-hansi-font-family:等线;
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B与C,B点可见
③
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false
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X-NONE
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A与C,A点可见
④
Normal
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7.8 磅
0
2
false
false
false
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ZH-CN
X-NONE
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A与C,C点可见
【单选题】
A点坐标为(10、20、30),B点坐标为(30、20、30)则AB距离为______。
①
Normal
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7.8 磅
0
2
false
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EN-US
ZH-CN
X-NONE
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正垂线
②
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侧垂线
③
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正平线
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铅垂线