已知一立体的主视图和俯视图，关于它的左视图，哪一种判断是正确的<img src="https://upload.icve.com.cn:89/ssykt/y@0558842F4F1489681A48F02C0BBC3B4B.png/download?time=636534318167593943&token=3C011857C82CBAC7A9D804F1ADC7BD2B&filename=%E8%87%AA%E5%8A%A8%E4%B8%8A%E4%BC%A0p5elah6ofilfkbdrcydsgg20180205125016.png"/>

【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/D365A6996CDA332DC493B9FE9927EB94.png title=8-1.png alt=8-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/4E4AD50C574720FCF94807F6927CC7C6.png title=8-2.png alt=8-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/5EE23578A59D53D47F078A43D4A139A6.png title=8-3.png alt=8-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/FEC57F19F806EEC34B18729DE09E7B87.png title=8-4.png alt=8-4.png/>

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【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"/>

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【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/0C52C91A700B46F1291047EBAAF2582B.png title=1-1.png alt=1-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/E8CBCB2E27AD24FE0F67B26BFF4437DB.png title=1-2.png alt=1-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/8D8DBB717FD25D3EA28D6C2BD8F1488F.png title=1-3.png alt=1-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/3272F09137CD67FEFA2E8D4946B2D863.png title=1-4.png alt=1-4.png/>

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【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/86A9FEC690F22BB9296D2778EB55A05A.png title=8-1.png alt=8-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/3DDE7B2AC73E648E09F2B0B3D05DDD75.png title=8-2.png alt=8-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/9EE30F6276519915567B786B0A899AA7.png title=8-3.png alt=8-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/EF5A90E84E1B3A86D27B5E35460F7606.png title=8-4.png alt=8-4.png/>

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【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/E7EAA3102655BA53F48E503ED3CF8EB7.png title=a.png alt=a.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/4A5EB0D9FF10BD1F08A825AF41FCF223.png title=b.png alt=b.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/3FAE9C4141DD11EA035574BE4B529DC3.png title=c.png alt=c.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/A6535FA3741EC3235BC000EC66134739.png title=d.png alt=d.png/>

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【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/71F96B01EC42624D2F43333C279904D8.png title=2-1.png alt=2-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/434DC9367A7013D83A4C86FA0710357B.png title=2-2.png alt=2-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/CCB45D994475E244267423BA4E6B4A5E.png title=2-3.png alt=2-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/0127ABAECB8C07F3EAB3DF13073029B9.png title=2-4.png alt=2-4.png/>

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【单选题】

① <img src=https://huaweicloudobs.ahjxjy.cn/FF980B92734F87DBBD9C605C29B2F2CA.png title=8-1.png alt=8-1.png/>

② <img src=https://huaweicloudobs.ahjxjy.cn/01C5B93A96A876A5EA1469FA8445A9B1.png title=8-2.png alt=8-2.png/>

③ <img src=https://huaweicloudobs.ahjxjy.cn/AA5D53B8325F955B691B6BB5BA726EE6.png title=8-3.png alt=8-3.png/>

④ <img src=https://huaweicloudobs.ahjxjy.cn/F91DD65F3397693D3B8BCB51636335AE.png title=8-4.png alt=8-4.png/>

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【判断题】

① 正确

② 错误

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【单选题】

<imgsrc="http://121.251.253.213/doc/a@7B954E5F91FE7A2078D479B19DA8F244.png/download?time=636002401335313338&token=260538373F1F6FD4C1339FE2727B1A5C&filename=png"data-preview_url_ueditor="doc/a@7B954E5F91FE7A2078D479B19DA8F244.png"data-url="doc/a@7B954E5F91FE7A2078D479B19DA8F244.png"/>

① 3/4

② 1/3

③ 1/4

④ 1/2

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【单选题】

<imgdata-url="doc/a@64C1EC3EEA4DF633E8F805F3E58A8237.png"data-preview_url_ueditor="doc/a@64C1EC3EEA4DF633E8F805F3E58A8237.png"src="http://121.251.253.213/doc/a@64C1EC3EEA4DF633E8F805F3E58A8237.png/download?time=635997624680243587&token=CF4E2E55F28CEA774D83D73AB9CCD032&filename=png"/>

① <imgdata-url="doc/a@CD9E3C0AEDBA75C158DE390C2B6821D9.png"data-preview_url_ueditor="doc/a@CD9E3C0AEDBA75C158DE390C2B6821D9.png"src="http://121.251.253.213/doc/a@CD9E3C0AEDBA75C158DE390C2B6821D9.png/download?time=635997625449012937&token=2B0506A7D55F104F3EB18AB1B438E15E&filename=png"/>

② <imgdata-url="doc/a@A1D843C6B606CAFFF22FD80B5FD689F3.png"data-preview_url_ueditor="doc/a@A1D843C6B606CAFFF22FD80B5FD689F3.png"src="http://121.251.253.213/doc/a@A1D843C6B606CAFFF22FD80B5FD689F3.png/download?time=635997625578805165&token=FDE9A0AD61E747CAFD5D2725C22228BA&filename=png"/>

③ <imgdata-url="doc/a@F74F9887F67CF35CD12FD326A8DF07D7.png"data-preview_url_ueditor="doc/a@F74F9887F67CF35CD12FD326A8DF07D7.png"src="http://121.251.253.213/doc/a@F74F9887F67CF35CD12FD326A8DF07D7.png/download?time=635997625722481418&token=114591636EA36A1A2C9190B8F9009CBF&filename=png"/>

④ <imgdata-url="doc/a@1DD22FD883B6768EC3835E79FCEDA936.png"data-preview_url_ueditor="doc/a@1DD22FD883B6768EC3835E79FCEDA936.png"src="http://121.251.253.213/doc/a@1DD22FD883B6768EC3835E79FCEDA936.png/download?time=635997625829341605&token=00879720FD2F6C88D666C6E45BAAAFAF&filename=png"/>

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