【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F357CE9B748AE7A9297A857101C75017.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F8F5DAED22E5F510ADCD0FD15F39CA3F.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/37F0456ADA1B08BD60456EF2346C69F2.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/18714A5B78C639BC6A3A44DA7566D2D0.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/55CE44F6CF764D20CE7510C0A41E745B.png title=2-4.png alt=2-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/190AFEA7694E6F2DC52CAC6CFAF4BCCE.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F8C3CCBF0FCF3C66F3176A5AC5C4428B.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C975D584DDFE1B8F5F5AB38E3FE18988.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/FBD3783231CE7DED930144512D40810D.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/7FDF61CA1D2B312B3BD569A3D44BA7EF.png title=2-4.png alt=2-4.png/>
【单选题】
img src=zzximg/20190730/1564476408892116.png title=1564476408892116.png alt=图片102.png/等于 （）
①
img src=zzximg/20190730/1564476424383415.png title=1564476424383415.png alt=图片103.png/
②
3
③
0
④
1
【单选题】
img src=zzximg/20190730/1564475140766082.png title=1564475140766082.png alt=图片78.png/的根式形式是（ ）
①
img src=zzximg/20190730/1564475169828406.png title=1564475169828406.png alt=图片79.png/
②
img src=zzximg/20190730/1564475177512856.png title=1564475177512856.png alt=图片80.png/
③
img src=zzximg/20190730/1564475183568179.png title=1564475183568179.png alt=图片81.png/
④
img src=zzximg/20190730/1564475188199139.png title=1564475188199139.png alt=图片82.png/
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/72876694B58943BA24CC94F9577F50B0.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F1F7E48872F58EA5FB405D8EBF4162C6.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/BF5FF68DF7985EBDCDBC025E7EF633E2.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/5EEF94B394508F1DF04D8E5A82A27691.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/97FFE9EE846C1C41D22F93675161CCAA.png title=2-4.png alt=2-4.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=https://huaweicloudobs.ahjxjy.cn/3DDF7E2C546693ADAE9FA7CEEAE8BC69.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/C49F76A10E5FF785124DAC0E7DAD3D02.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/FDDC152605429D8C5DE7E01CBE4CD8CC.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/55F53BAEE96A0A68A387F0AF77CD799B.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/ADFCB2C6C5DD209551C2B312192E407C.png title=2-4.png alt=2-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/FB125A5C638A733F2E25066D6EBE1A45.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/559AA49E4B715CA8E4564367541FB32B.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/6B8992172FD0DA673284EADA0DEBA3B1.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/8307E3C9FB06876FE108BCD178A75B33.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/2779B84DB2CCFC5CE6E9837B0E0AA5B5.png title=2-4.png alt=2-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/7C76A4BA585796AF6408CE7871E97C14.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/6A7D2DA524D3B6BF50989E7EE1BE9347.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/4D9C8E5D7DB703CDF9DFD5ED7F2A7628.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/FDC7D60C20EFCB085E478589250E9021.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/B92CADDA4DC624C9E95A944058BB7362.png title=2-4.png alt=2-4.png/>
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/5448966A2A0306DCAD728A8810867ECD.png" title="1.png" alt="1.png"/><img src="https://huaweicloudobs.ahjxjy.cn/ABC7229341983F49196830A34F7982A2.png" title="2.png" alt="2.png"/>
