【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
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B与C,B点可见
③
Normal
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7.8 磅
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2
false
false
false
EN-US
ZH-CN
X-NONE
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A与C,A点可见
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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A与C,C点可见
【单选题】
已知点A(20,20,10),点B(20,25,30),则( )产生重影点。
【单选题】
已知三点A(10、20、15)、B(10、0、30)、C(0、10、0),则在坐标面上的点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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A、B、C三点
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
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mso-pagination:widow-orphan;
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mso-bidi-font-size:11.0pt;
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mso-ascii-font-family:等线;
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B点
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B、C两点
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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C点
【单选题】
用某种排序方法对线性表(25,87,21,47,15,27,63,35,20)进行排序时,元素序列的变化情况如下:(1)25,87,21,47,15,27,63,35,20(2)20,15,21,25,47,27,63,35,87(3)15,20,21,25,35,27,47,63,87(4)15,20,21,25,27,35,47,63,87则采用的排序方法是___________排序长度为4。
【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
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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正垂线
②
Normal
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7.8 磅
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2
false
false
false
EN-US
ZH-CN
X-NONE
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侧垂线
③
Normal
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7.8 磅
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2
false
false
false
EN-US
ZH-CN
X-NONE
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正平线
④
Normal
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2
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false
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EN-US
ZH-CN
X-NONE
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铅垂线
【单选题】
已知点A(20,20,10),点B(20,20,30),则( )产生重影点。
【单选题】
20只大鼠按照体重随机分成10对,进行配对t检验,则自由度为:
【单选题】
已知E点距H、V、W面的距离分为10、5、20; F点在E点上方5,左方10,前方15,由此可知F的坐标为()
【单选题】
某企业规定的信用条件为:“5/10,2/20,n/30”,某客户从该企业购入原价为10 000元的原材料,并于第15天付款,该客户实际支付的货款是( )。