【单选题】
点(0,2)到直线<img src="20190809/1565320123974836.png" title="1565320123974836.png" alt="图片22.png"/>的距离为( )
【单选题】
直线<img src="20190809/1565320469784241.png" title="1565320469784241.png" alt="图片33.png"/>的斜率为( )
①
<img class="kfformula" src="20190809/1565320507335017.png" data-latex="\frac {1} {2}"/>
②
<img class="kfformula" src="20190809/1565320507148737.png" data-latex="-\frac {1} {2}"/>
③
<img class="kfformula" src="20190809/1565320507128594.png" data-latex="2"/>
④
<img class="kfformula" src="20190809/1565320507871509.png" data-latex="-2"/>
【单选题】
直线<img src="20190809/1565321125544656.png" title="1565321125544656.png" alt="图片43.png"/>与圆<img src="20190809/1565321148327721.png" title="1565321148327721.png" alt="图片44.png"/>的位置关系是()
【单选题】
已知点M(2,-1)、N(1,4)和直线 x+2y-1=0,则( )
【单选题】
已知直线过点<img class="kfformula" src="20190809/1565321501439277.png" data-latex="\left ( {\sqrt {3},-3} \right )"/>,且倾斜角为30°,则直线的方程是( )
①
<img src="20190809/1565321420131356.png" title="1565321420131356.png" alt="图片49.png"/>
②
<img src="20190809/1565321484569743.png" title="1565321484569743.png" alt="图片50.png"/>
③
<img src="20190809/1565321493966443.png" title="1565321493966443.png" alt="图片51.png"/>
④
<img src="20190809/1565321498657079.png" title="1565321498657079.png" alt="图片52.png"/>
【单选题】
下列哪一条直线和直线<img src="20190809/1565320201526987.png" title="1565320201526987.png" alt="图片23.png"/>垂直( )
①
<img src="20190809/1565320231265885.png" title="1565320231265885.png" alt="图片24.png"/>
②
<img src="20190809/1565320236985820.png" title="1565320236985820.png" alt="图片25.png"/>
③
<img src="20190809/1565320240932537.png" title="1565320240932537.png" alt="图片26.png"/>
④
<img src="20190809/1565320244810901.png" title="1565320244810901.png" alt="图片27.png"/>
【单选题】
下列哪一条直线和直线<img src="20190809/1565320280214095.png" title="1565320280214095.png" alt="图片28.png"/>平行( )
①
<img src="20190809/1565320330561884.png" title="1565320330561884.png" alt="图片29.png"/>
②
<img src="20190809/1565320342971883.png" title="1565320342971883.png" alt="图片30.png"/>
③
<img src="20190809/1565320351487163.png" title="1565320351487163.png" alt="图片32.png"/>
④
<img src="20190809/1565320355903162.png" title="1565320355903162.png" alt="图片31.png"/>
【单选题】
圆心在(3,-2)且与y轴相切的圆的方程是( )
【单选题】
经过点(0,-3)和点(-2,0)的直线的斜率为( )
①
<img class="kfformula" src="20190809/1565321660113443.png" data-latex="\frac {2} {3}"/>
②
<img class="kfformula" src="20190809/1565321660704793.png" data-latex="\frac {3} {2}"/>
③
<img class="kfformula" src="20190809/1565321660224474.png" data-latex="-\frac {3} {2}"/>
④
<img class="kfformula" src="20190809/1565321660377728.png" data-latex="-\frac {2} {3}"/>
【单选题】
一个球的直径是6cm,距球心2cm处有一截面圆,这个截面圆的半径是()
①
<img class="kfformula" src="20190809/1565323084593264.png" data-latex="4\sqrt {2}"/>
②
<img class="kfformula" src="20190809/1565323084828913.png" data-latex="\sqrt {5}"/>
③
<img class="kfformula" src="20190809/1565323084235099.png" data-latex="1"/>
④
<img class="kfformula" src="20190809/1565323084316280.png" data-latex="\sqrt {13}"/>