【单选题】【消耗次数：1】
沉降观测时水准基点和观测点之间的距离一般应在米范围内，一般沉降点是均匀布置的，距离一般为米。
①
A、80、5~10
②
B、80、10~20
③
C、100、5~10
④
D、100、10~20
参考答案：
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【单选题】
G02X20Y20R-10F100；所加工的一般是（）。
①
整圆
②
夹角180°的顺时针圆弧
③
180o〈夹角〈360°的逆时针圆弧
④
180o〈夹角〈360°的顺时针圆弧
【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
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0
7.8 磅
0
2
false
false
false
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ZH-CN
X-NONE
A与D，D点可见
②
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0
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false
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false
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ZH-CN
X-NONE
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B与C，B点可见
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Normal
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7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
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A与C，A点可见
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false
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ZH-CN
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【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（）
①
(15，30，35)
②
( 30,20,15)
③
( 15，20，30)
④
( 10,20,5)
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7.8 磅
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ZH-CN
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②
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