【单选题】【消耗次数：1】
1-3岁小儿的正常呼吸为（）次/分
①
30-40
②
25-30
③
20-25
④
18-20
参考答案：
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【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
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ZH-CN
X-NONE
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②
Normal
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侧垂线
③
Normal
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7.8 磅
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X-NONE
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正平线
④
Normal
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7.8 磅
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false
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ZH-CN
X-NONE
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铅垂线
【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
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2
false
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EN-US
ZH-CN
X-NONE
A与D，D点可见
②
Normal
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7.8 磅
0
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false
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EN-US
ZH-CN
X-NONE
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B与C，B点可见
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A与C，A点可见
④
Normal
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7.8 磅
0
2
false
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false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
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A与C，C点可见
【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
Normal
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7.8 磅
0
2
false
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ZH-CN
X-NONE
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表示一个平面
②
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ZH-CN
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不能表示一个平面
③
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表示一个特殊位置平面
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无法判断
【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。
①
交换排序法
②
选择排序法
③
插入排序
④
选择排序
随机题目