【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/1503035DCBDFBF4943EF1C37FEBF66AF.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/1E98678E2B4489E72FB821C1C5DE82C2.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/67067DF543AC6ECDEDF5914F5905DB45.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/BBD466118C16CBAEEE2EC9F36919711E.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A4DAA4D203904CFAC6913FAE170260CB.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/3E53213AB4E057479D842F777374041A.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/2ECBA93F5060DBF5F8976AA5506B3CFF.png title=aa.png alt=aa.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/BEBD596C6889F4F1EBE87CE09F0992D1.png title=bb.png alt=bb.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/702147610FE967123E50307D61ADEAF4.png title=cc.png alt=cc.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/E620D918A1590C38FEBFC1DDDE939C48.png title=dd.png alt=dd.png/>
【单选题】
已知向量<img src="20190809/1565318424536224.png" title="1565318424536224.png" alt="图片12.png"/>的长度为3，方向向东，向量<img src="20190809/1565318432803809.png" title="1565318432803809.png" alt="图片11.png"/>的长度为4，方向向北，则<img src="20190809/1565318416857876.png" title="1565318416857876.png" alt="图片10.png"/>等于( )
①
<img class="kfformula" src="20190809/1565318471610307.png" data-latex="5"/>
②
<img class="kfformula" src="20190809/1565318471807250.png" data-latex="7"/>
③
<img class="kfformula" src="20190809/1565318471275858.png" data-latex="11"/>
④
<img class="kfformula" src="20190809/1565318471551260.png" data-latex="\sqrt {73}"/>
【单选题】
<img src="20190730/1564476408892116.png" title="1564476408892116.png" alt="图片102.png"/>等于 （）
①
0
②
<img src="20190730/1564476424383415.png" title="1564476424383415.png" alt="图片103.png"/>
③
1
④
3
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/00203FA14CF9A045163CA865FAFD9F44.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/16BB67CBEEB21D86E9D4E7E0EDA9A34D.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/79F4B035C8DCC38B39B778AD0DC5E808.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/B612401B97066F5A9CC6DBEE9747DB4D.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/5512759BB58DEE53722D3A5CBC8F932C.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/983812BD69578E004A38A599E69AD6D1.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/BCB527768BE024D16B94B70DAFB55FF7.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/755E2C4557AAA68ADC8ADDCB1BEC71D1.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/DD25F2EAE63D9036A3D1FCCE13D17EA8.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/87884932D3EF164432BBD261CFAE53E0.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E8A54C76CA852100DF87373A75482D1F.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/597EDEC7110E2260B5ECD968B23F4B10.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C4AB468022F3E342778127CEDDEDB8AC.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/EDEA00BA4AF6AD98B610DBB746307295.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A751620C227EAC4E36176E6C556B5AA7.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A099FC48E47A52BB2EB135306381E7A5.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/822E15B5CAD65B37A437DCD4966E4DA0.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/2F285D01FF120D170953B55395F2A715.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/58B7001DFFD9B37DAA1F89C5000AA131.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/DCB8A6BA3D7C8C62CBAA548BBE1377AE.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/FCE7DB37A48267DB1F275729852E2D7F.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/4A6C7713D86BA1A89071573271E9A148.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/66D00E61509C2865B1C21306993FE07D.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/613268B0C322039DF8BFC3A42F5875B5.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/FB75BFA15193B8C7305CB97D6361228F.png title=3-4.png alt=3-4.png/>
【单选题】
下列图例表示有（ ）根管线投影重叠。<img src="20200602/1591089903404754.png" title="1591089903404754.png" alt="TTTTTTTTTTT.png"/>
①
5
②
4
③
3
④
2
