【单选题】【消耗次数：1】
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①
1/3
②
1/4
③
1
④
1/2
参考答案：
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相关题目
【单选题】
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①
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②
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③
<imgsrc="http://121.251.253.213/doc/a@64E1C45016A875270ADD44DD646BD9B8.png/download?time=636002413948871493&token=791C202D63C95CA99AB83A1F6F1E7DE9&filename=png"data-preview_url_ueditor="doc/a@64E1C45016A875270ADD44DD646BD9B8.png"data-url="doc/a@64E1C45016A875270ADD44DD646BD9B8.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@4B8DD3C9F261F0664AE8BDE1F8CCAD89.png/download?time=636002414039039651&token=7ACAA576D52E5AE848DF68ACE7B6E1A7&filename=png"data-preview_url_ueditor="doc/a@4B8DD3C9F261F0664AE8BDE1F8CCAD89.png"data-url="doc/a@4B8DD3C9F261F0664AE8BDE1F8CCAD89.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@62CCC9248E6C5CEC9ECB487FFBC2C519.png/download?time=636002476138068722&token=141D02AA787A7554363662D240011921&filename=png"data-url="doc/a@62CCC9248E6C5CEC9ECB487FFBC2C519.png"data-preview_url_ueditor="doc/a@62CCC9248E6C5CEC9ECB487FFBC2C519.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@145B3AC53465C70D90DE0185C036A490.png/download?time=636002476212168852&token=AEBC4369C96DE92EF1B20DF70052F9C3&filename=png"data-url="doc/a@145B3AC53465C70D90DE0185C036A490.png"data-preview_url_ueditor="doc/a@145B3AC53465C70D90DE0185C036A490.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@DBF4517EDFBD9FBFD42E1AEFD412897C.png/download?time=636002476292508993&token=DD1511B0D3AE73B8F5BF2C869A8F52F5&filename=png"data-url="doc/a@DBF4517EDFBD9FBFD42E1AEFD412897C.png"data-preview_url_ueditor="doc/a@DBF4517EDFBD9FBFD42E1AEFD412897C.png"/>
③
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④
<imgsrc="http://121.251.253.213/doc/a@1AAC94D22983B7C08A700950B6103C74.png/download?time=636002476446481264&token=7B31FF13B112C110C09DD7C42D18DC68&filename=png"data-url="doc/a@1AAC94D22983B7C08A700950B6103C74.png"data-preview_url_ueditor="doc/a@1AAC94D22983B7C08A700950B6103C74.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@D652C917A063EE2A46E590A7234DED3A.png/download?time=635998750773993466&token=DD693311A8090F3A2951624C8EB13C5F&filename=png"data-preview_url_ueditor="doc/a@D652C917A063EE2A46E590A7234DED3A.png"data-url="doc/a@D652C917A063EE2A46E590A7234DED3A.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@96CD9B5B4738138BA8B2DC6B7F916769.png/download?time=636002385400665350&token=EB69AC16C52E457BF2A230500D3F68EA&filename=png"data-preview_url_ueditor="doc/a@96CD9B5B4738138BA8B2DC6B7F916769.png"data-url="doc/a@96CD9B5B4738138BA8B2DC6B7F916769.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@CEF999F3B2925DCEB45011D7827CD8C0.png/download?time=636002385529677577&token=CA9CB3B351F7B4D51B8ABF3784871650&filename=png"data-preview_url_ueditor="doc/a@CEF999F3B2925DCEB45011D7827CD8C0.png"data-url="doc/a@CEF999F3B2925DCEB45011D7827CD8C0.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@5E803501A864F8A7BDA87E1DF7BA3876.png/download?time=636002385695505868&token=4A18791493123A1CDCDA3CA2A4D6BBDD&filename=png"data-preview_url_ueditor="doc/a@5E803501A864F8A7BDA87E1DF7BA3876.png"data-url="doc/a@5E803501A864F8A7BDA87E1DF7BA3876.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@8E2CA690FF79E1740CA8C17CA0A40E40.png/download?time=636002385869446174&token=1AE71C99AE1DDBB2BB64D36B428AAAF3&filename=png"data-preview_url_ueditor="doc/a@8E2CA690FF79E1740CA8C17CA0A40E40.png"data-url="doc/a@8E2CA690FF79E1740CA8C17CA0A40E40.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@3EEB543EE4C26953B2F4A84849EF970E.png/download?time=636002407370339938&token=2B860297B4D3A37E02DD8FD066E353D5&filename=png"data-preview_url_ueditor="doc/a@3EEB543EE4C26953B2F4A84849EF970E.png"data-url="doc/a@3EEB543EE4C26953B2F4A84849EF970E.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@39718BFE07D413FF9B5576D082DF02A2.png/download?time=636002407468308110&token=B91DA8C5350A10D491A51533ABD0C98B&filename=png"data-preview_url_ueditor="doc/a@39718BFE07D413FF9B5576D082DF02A2.png"data-url="doc/a@39718BFE07D413FF9B5576D082DF02A2.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@243286ACC8E46086F734CA856A259C5F.png/download?time=636002407561752274&token=1F3B294A3C4990CC176E288A73F7F41C&filename=png"data-preview_url_ueditor="doc/a@243286ACC8E46086F734CA856A259C5F.png"data-url="doc/a@243286ACC8E46086F734CA856A259C5F.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@C40D30CADEB6FB497B64EA46BBC6D361.png/download?time=636002407648644427&token=8F86320F39DFDE390D3A1F566BB8A1B2&filename=png"data-preview_url_ueditor="doc/a@C40D30CADEB6FB497B64EA46BBC6D361.png"data-url="doc/a@C40D30CADEB6FB497B64EA46BBC6D361.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@2171497A1A069BCA694AC32D89A3EE15.png/download?time=636002407739280586&token=D4B87765F15D9453D1F9B5AAD647E41E&filename=png"data-preview_url_ueditor="doc/a@2171497A1A069BCA694AC32D89A3EE15.png"data-url="doc/a@2171497A1A069BCA694AC32D89A3EE15.png"/>
【单选题】
<imgdata-url="doc/a@CF364D682E7EDC3D6F4E30F2BB4F580C.png"data-preview_url_ueditor="doc/a@CF364D682E7EDC3D6F4E30F2BB4F580C.png"src="http://121.251.253.213/doc/a@CF364D682E7EDC3D6F4E30F2BB4F580C.png/download?time=635997629330923755&token=1279F1B02A815952B66C14C416407130&filename=png"/>
①
<imgdata-url="doc/a@FD3BE4B9A603A28900BA1CE5A4917F8F.png"data-preview_url_ueditor="doc/a@FD3BE4B9A603A28900BA1CE5A4917F8F.png"src="http://121.251.253.213/doc/a@FD3BE4B9A603A28900BA1CE5A4917F8F.png/download?time=635997629504240060&token=541E9A5C2B0C3ED87051C8D3BDF24F82&filename=png"/>
②
<imgdata-url="doc/a@7A41590BEFCFCBE74C6F7E89E7967805.png"data-preview_url_ueditor="doc/a@7A41590BEFCFCBE74C6F7E89E7967805.png"src="http://121.251.253.213/doc/a@7A41590BEFCFCBE74C6F7E89E7967805.png/download?time=635997629627012275&token=B43E29170C3B3757C96EB1A856117760&filename=png"/>
③
<imgdata-url="doc/a@99F8D6DB9EB3FB1C901B53915B0A099D.png"data-preview_url_ueditor="doc/a@99F8D6DB9EB3FB1C901B53915B0A099D.png"src="http://121.251.253.213/doc/a@99F8D6DB9EB3FB1C901B53915B0A099D.png/download?time=635997629743700480&token=080FC0D2FF79A92E265FCC56F38259B3&filename=png"/>
④
<imgdata-url="doc/a@827C3797B683CCCEE410F2ACE266DAAE.png"data-preview_url_ueditor="doc/a@827C3797B683CCCEE410F2ACE266DAAE.png"src="http://121.251.253.213/doc/a@827C3797B683CCCEE410F2ACE266DAAE.png/download?time=635997629843852656&token=89F3878D2896DF9EE9FFD429BD4960F7&filename=png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@C822C5255D1BFBC4EFF55E23D4FEA269.png/download?time=636002468341175028&token=CE6F6A3098A2546CA448994156A06B4F&filename=png"data-url="doc/a@C822C5255D1BFBC4EFF55E23D4FEA269.png"data-preview_url_ueditor="doc/a@C822C5255D1BFBC4EFF55E23D4FEA269.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@DBEEBE73CFA7E73C6399957FED644156.png/download?time=636002468484851280&token=43D4A78B0932FDEAAE930017B2517CAC&filename=png"data-url="doc/a@DBEEBE73CFA7E73C6399957FED644156.png"data-preview_url_ueditor="doc/a@DBEEBE73CFA7E73C6399957FED644156.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@46FC620B1AB1E78C4769EE7DEC50E108.png/download?time=636002468571743433&token=A4202C39CC5013BF42AC4A44EF5E4D77&filename=png"data-url="doc/a@46FC620B1AB1E78C4769EE7DEC50E108.png"data-preview_url_ueditor="doc/a@46FC620B1AB1E78C4769EE7DEC50E108.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@6D0DDF8D51FC73666E0CAB6BFD87EC11.png/download?time=636002468660351588&token=77DA416D90A08F2FCD792C6C4373158D&filename=png"data-url="doc/a@6D0DDF8D51FC73666E0CAB6BFD87EC11.png"data-preview_url_ueditor="doc/a@6D0DDF8D51FC73666E0CAB6BFD87EC11.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@B0F0D2D6CBE8FCD42A1FD6230EF28E9F.png/download?time=636002468776259792&token=DC997BA41CF7924924C2AFBC05991177&filename=png"data-url="doc/a@B0F0D2D6CBE8FCD42A1FD6230EF28E9F.png"data-preview_url_ueditor="doc/a@B0F0D2D6CBE8FCD42A1FD6230EF28E9F.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@C698C4ADC93D93531381824327A9FF44.png/download?time=636002474470581793&token=0B9B3D8B57AE0E63ECE153E923BCE509&filename=png"data-url="doc/a@C698C4ADC93D93531381824327A9FF44.png"data-preview_url_ueditor="doc/a@C698C4ADC93D93531381824327A9FF44.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@CF33E559A85423D5CAB6EDCFECDC1DC7.png/download?time=636002474556069944&token=1F73253CE0DBDE683628F12C5F4D8450&filename=png"data-url="doc/a@CF33E559A85423D5CAB6EDCFECDC1DC7.png"data-preview_url_ueditor="doc/a@CF33E559A85423D5CAB6EDCFECDC1DC7.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@60A71C811B81029FBF602DFB3E611403.png/download?time=636002474654194116&token=D3D19601DFC12A813BAA15BE2BFEF530&filename=png"data-url="doc/a@60A71C811B81029FBF602DFB3E611403.png"data-preview_url_ueditor="doc/a@60A71C811B81029FBF602DFB3E611403.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@1CC11FD18C5106A0703556B59DF43E87.png/download?time=636002474737810263&token=CC4793C07577F75B877ADA52A41C1E24&filename=png"data-url="doc/a@1CC11FD18C5106A0703556B59DF43E87.png"data-preview_url_ueditor="doc/a@1CC11FD18C5106A0703556B59DF43E87.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@147CD7754712A48704A0454D88895623.png/download?time=636002474844982451&token=3081AFA389E2249745935FD3A4A33759&filename=png"data-url="doc/a@147CD7754712A48704A0454D88895623.png"data-preview_url_ueditor="doc/a@147CD7754712A48704A0454D88895623.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@F40089C6EE85E2D136211F10253A5698.png/download?time=636002405281028268&token=97BDD00CEAA6E56F32B8E987DD49B9AA&filename=png"data-preview_url_ueditor="doc/a@F40089C6EE85E2D136211F10253A5698.png"data-url="doc/a@F40089C6EE85E2D136211F10253A5698.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@E99A777F88517CA13AAE35DD30DBB71F.png/download?time=636002405398808475&token=4D7248307C9F6F80208444D59D17659B&filename=png"data-preview_url_ueditor="doc/a@E99A777F88517CA13AAE35DD30DBB71F.png"data-url="doc/a@E99A777F88517CA13AAE35DD30DBB71F.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@09D42ABBE14E83AE4D55C2BDE4A9773B.png/download?time=636002405516900683&token=EDAE071674E78C3719A53AA00F69D4F1&filename=png"data-preview_url_ueditor="doc/a@09D42ABBE14E83AE4D55C2BDE4A9773B.png"data-url="doc/a@09D42ABBE14E83AE4D55C2BDE4A9773B.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@1F36AE2BFAF559AF77D269C3C351F2A5.png/download?time=636002405634056888&token=78165392C86D653738CFFD74D7B01289&filename=png"data-preview_url_ueditor="doc/a@1F36AE2BFAF559AF77D269C3C351F2A5.png"data-url="doc/a@1F36AE2BFAF559AF77D269C3C351F2A5.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@344592340C9884191FD3C1CA39FDAF73.png/download?time=636002405754957101&token=1CE4D33A49B8C5924089001A4BEECB53&filename=png"data-preview_url_ueditor="doc/a@344592340C9884191FD3C1CA39FDAF73.png"data-url="doc/a@344592340C9884191FD3C1CA39FDAF73.png"/>
【单选题】
<imgsrc="http://121.251.253.213/doc/a@F7DFB53E01818944D852AA5ECC191CEC.png/download?time=636002423040255461&token=7E12063C1087B7CE79120A46C22C77A4&filename=png"data-preview_url_ueditor="doc/a@F7DFB53E01818944D852AA5ECC191CEC.png"data-url="doc/a@F7DFB53E01818944D852AA5ECC191CEC.png"/>
①
<imgsrc="http://121.251.253.213/doc/a@D21DE64C3DBA04E3EFF86EBC2F60CDEB.png/download?time=636002423445856173&token=C0943D40F3B2501A8F02FBEA0E2E2505&filename=png"data-preview_url_ueditor="doc/a@D21DE64C3DBA04E3EFF86EBC2F60CDEB.png"data-url="doc/a@D21DE64C3DBA04E3EFF86EBC2F60CDEB.png"/>
②
<imgsrc="http://121.251.253.213/doc/a@316FF33F9C0F2533BF47288DA9C8E085.png/download?time=636002423526664315&token=3BB1460E7F5D236EFB1518F30B5639C1&filename=png"data-preview_url_ueditor="doc/a@316FF33F9C0F2533BF47288DA9C8E085.png"data-url="doc/a@316FF33F9C0F2533BF47288DA9C8E085.png"/>
③
<imgsrc="http://121.251.253.213/doc/a@F6EC792366661495173DD40D102C98AD.png/download?time=636002423620108479&token=7F23A095B13B128BF438EF6731068BB5&filename=png"data-preview_url_ueditor="doc/a@F6EC792366661495173DD40D102C98AD.png"data-url="doc/a@F6EC792366661495173DD40D102C98AD.png"/>
④
<imgsrc="http://121.251.253.213/doc/a@61FCBA64D1107B85E22AF30B438DD9FD.png/download?time=636002423709652637&token=571DD66154D3E0DE24F32E569341FDCB&filename=png"data-preview_url_ueditor="doc/a@61FCBA64D1107B85E22AF30B438DD9FD.png"data-url="doc/a@61FCBA64D1107B85E22AF30B438DD9FD.png"/>
【单选题】
<imgdata-url="doc/a@A5D73AD1B9876D3B1284C39D684E7736.png"data-preview_url_ueditor="doc/a@A5D73AD1B9876D3B1284C39D684E7736.png"src="http://121.251.253.213/doc/a@A5D73AD1B9876D3B1284C39D684E7736.png/download?time=635997619599470663&token=543BDEAD2F9916CA87B05DCF8C27A0AA&filename=png"/>
①
PA=B
②
AP=B
③
PB=A
④
BP=A
随机题目
【单选题】
直线在三面投影体系中，按其对投影面的相对位置可分为（ ）。
①
投影面平行线、投影面垂直线和一般位置直线
②
投影面剪切线、投影面垂直线和一般位置直线
③
投影面平行线、投影面垂直线和投影面剪切线
④
投影面平行线、投影面剪切线和一般位置直线
【单选题】
下列关于重影点投影可见性的判别方法说法有误的一项是（ ）。
①
对正面重影点，观者从前向后看，前面一点看得见，后面一点看不见
②
对侧面重影点，观者从左向右看，左面一点看得见，右面一点看不见
③
对水平重影点，观者从上向下看，上面一点看得见，下面一点看不见
④
在投影图上判别重影点的可见性时，要求把看的见的点的投影符号用括号括起来