【单选题】
img class=kfformula src=zzximg/20190808/1565256388580621.png data-latex={25}^{\frac {3} {2}}=/( )
【单选题】
二次函数img class=kfformula src=zzximg/20190808/1565254258613538.png data-latex=y={x}^{2}+mx+6/的顶点img class=kfformula src=zzximg/20190808/1565254258861129.png data-latex=\left ( {-1,5} \right )/img class=kfformula src=zzximg/20190808/1565254258615064.png data-latex=m/的值为( )
【单选题】
已知img class=kfformula src=zzximg/20190809/1565322050560879.png data-latex=A\left ( {0,-2} \right )/img class=kfformula src=zzximg/20190809/1565322050489966.png data-latex=B\left ( {x,6} \right )/的中点坐标为img class=kfformula src=zzximg/20190809/1565322050782302.png data-latex=\left ( {-1,y} \right )/img class=kfformula src=zzximg/20190809/1565322050701271.png data-latex=x/img class=kfformula src=zzximg/20190809/1565322050277662.png data-latex=y/的值分别为( )
①
img class=kfformula src=zzximg/20190809/1565322050607462.png data-latex=x=2,y=4/
②
img class=kfformula src=zzximg/20190809/1565322050205695.png data-latex=x=-2,y=2/
③
img class=kfformula src=zzximg/20190809/1565322050358526.png data-latex=x=-4,y=-2/
④
img class=kfformula src=zzximg/20190809/1565322050656212.png data-latex=x=-4,y=25/
【单选题】
<img class="kfformula" src="20190808/1565256388580621.png" data-latex="{25}^{\frac {3} {2}}="/>( )
【单选题】
img class=kfformula src=zzximg/20190730/1564475645410465.png data-latex={5}^{-1}/等于()
①
img class=kfformula src=zzximg/20190730/1564475645939907.png data-latex=-5/
②
img class=kfformula src=zzximg/20190730/1564475645707520.png data-latex=5/
③
img class=kfformula src=zzximg/20190730/1564475645473521.png data-latex=\frac {1} {5} width=94 height=63/
④
img class=kfformula src=zzximg/20190730/1564475645509248.png data-latex=-\frac {1} {5} width=96 height=63/
【单选题】
img class=kfformula src=zzximg/20190808/1565256297772060.png data-latex=\sqrt {\left ( {lg5-1} \right )^{2}}/的值等于( )
①
img class=kfformula src=zzximg/20190808/1565256297148379.png data-latex=lg5-1/
②
img class=kfformula src=zzximg/20190808/1565256297764160.png data-latex=lg5/
③
img class=kfformula src=zzximg/20190808/1565256297303551.png data-latex=lg2/
④
img class=kfformula src=zzximg/20190808/1565256297983776.png data-latex=lg\frac {1} {5}/
【单选题】
如果img class=kfformula src=zzximg/20190808/1565251013539366.png data-latex=ab/,那么下列不等式正确的是( )
①
img class=kfformula src=zzximg/20190808/1565251013738499.png data-latex=a-2b-2/
②
img class=kfformula src=zzximg/20190808/1565251013586057.png data-latex=\frac {1} {2}a\frac {1} {2}b/
③
img class=kfformula src=zzximg/20190808/1565251013931183.png data-latex=-3a-3b/
④
img class=kfformula src=zzximg/20190808/1565251013130324.png data-latex=5a5b/
【单选题】
已知<img class="kfformula" src="20190809/1565317530438878.png" data-latex="a,b,c"/>是公比为2的等比数列,则<img class="kfformula" src="20190809/1565317530533557.png" data-latex="\frac {{b}^{2}} {ac}" width="74" height="64"/>等于( )
①
<img class="kfformula" src="20190809/1565317530127108.png" data-latex="\frac {1} {2}"/>
②
<img class="kfformula" src="20190809/1565317530414229.png" data-latex="1"/>
③
<img class="kfformula" src="20190809/1565317530771921.png" data-latex="\frac {1} {8}"/>
④
<img class="kfformula" src="20190809/1565317530451678.png" data-latex="\frac {1} {4}"/>
【单选题】
函数img class=kfformula src=zzximg/20190808/1565253438624934.png data-latex=y=2-{x}^{2}/的单调递减区间是( )
①
img class=kfformula src=zzximg/20190808/1565253438117832.png data-latex=\left ( {0,+\infty } \right )/
②
img class=kfformula src=zzximg/20190808/1565253438467999.png data-latex=\left ( {-\infty ,0} \right )/
③
img class=kfformula src=zzximg/20190808/1565253438403956.png data-latex=\left ( {-\infty ,-1} \right )/
④
img class=kfformula src=zzximg/20190808/1565253438303182.png data-latex=\left ( {-1,+\infty } \right )/
【单选题】
除去<img class="kfformula" src="20200629/1593439477401116.png" data-latex="{CO}_{2}" width="47" height="31"/>中混有的少量<img class="kfformula" src="20200629/1593439477395990.png" data-latex="{SO}_{2}" width="52" height="33"/>气体,可选用试剂( )。
③
饱和<img class="kfformula" src="20200629/1593439477463503.png" data-latex="NaH{CO}_{3}" width="84" height="35"/>溶液
【单选题】
检验<img class="kfformula" src="20200629/1593438124440556.png" data-latex="{SO}_{2}" width="46" height="34"/>中是否有<img class="kfformula" src="20200629/1593438124677903.png" data-latex="{CO}_{2}" width="41" height="31"/>,应采取的措施是()。
②
通过<img class="kfformula" src="20200629/1593438124664740.png" data-latex="{Ba(OH)}_{2}" width="75" height="29"/>溶液再通过石灰水
④
通过<img class="kfformula" src="20200629/1593438124648423.png" data-latex="{KMnO}_{4}" width="70" height="27"/>酸性溶液再通过石灰水