【单选题】【消耗次数：1】
当平面平行于投影面时，平面在该投影面上的投影（ ）。
①
为一形状类似但缩小了的图形
②
反映实形
③
积聚成一条曲线
④
积聚成一条直线
参考答案：
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纠错
相关题目
【单选题】
直线平行于投影面，其投影反映直线的实长；平面图形平行于投影面，其投影反映平面图形的实形。是正投影法的基本性质中的（ ）。
①
类似性
②
平行性
③
从属性
④
实形性
【单选题】
直线平行于投影面，其投影反映直线的实长；平面图形平行于投影面，其投影反映平面图形的实形。是正投影法的基本性质中的[填空]。
①
类似性
②
平行性
③
从属性
④
实形性
【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
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-pagination:widow-orphan;
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mso-bidi-font-size:11.0pt;
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真实性
③
Normal
0
7.8 磅
0
2
false
false
false
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ZH-CN
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mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
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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类似收缩性
④
Normal
0
7.8 磅
0
2
false
false
false
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ZH-CN
X-NONE
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mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
收缩性
【单选题】
平面的正面投影积聚为一条直线并与OX轴平行，该平面是（ ）。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.5pt;
mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
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正平面
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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水平面
③
Normal
0
7.8 磅
0
2
false
false
false
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ZH-CN
X-NONE
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正垂面
④
Normal
0
7.8 磅
0
2
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铅垂面
随机题目
【单选题】
渗出的最早期的血流动力学改变为（ ）
①
小动脉短暂痉挛，血流减少
②
小静脉扩张，血流变慢
③
血管壁通透性增加
④
毛细血管扩张，血流淤滞
⑤
小动脉扩张，血流加快