【单选题】
对于反应<img class="kfformula" src="20200629/1593408362686817.png" data-latex="{2SO}_{2}+{O}_{2}-{2SO}_{3}" width="124" height="28"/>正反应放热，增大压强，平衡（）移动。
①
向逆反应方向移动
②
平衡不移动，浓度改变
③
向正反应方向移动
④
平衡不移动，浓度不变
【单选题】
二次函数<img class="kfformula" src="20190808/1565254258613538.png" data-latex="y={x}^{2}+mx+6"/>的顶点<img class="kfformula" src="20190808/1565254258861129.png" data-latex="\left ( {-1,5} \right )"/>，则<img class="kfformula" src="20190808/1565254258615064.png" data-latex="m"/>的值为（ ）
①
2
②
5
③
-2
④
-5
【单选题】
<img class="kfformula" src="20190730/1564475645410465.png" data-latex="{5}^{-1}"/>等于（）
①
<img class="kfformula" src="20190730/1564475645509248.png" data-latex="-\frac {1} {5}" width="96" height="63"/>
②
<img class="kfformula" src="20190730/1564475645473521.png" data-latex="\frac {1} {5}" width="94" height="63"/>
③
<img class="kfformula" src="20190730/1564475645939907.png" data-latex="-5"/>
④
<img class="kfformula" src="20190730/1564475645707520.png" data-latex="5"/>
【单选题】
<img class="kfformula" src="20190808/1565256537299613.png" data-latex="\left ( {{log}_{3}2} \right )\cdot \left ( {{log}_{2}27} \right )="/>（ ）
①
2
②
1
③
3
④
4
【单选题】
<img class="kfformula" src="20190808/1565256297772060.png" data-latex="\sqrt {\left ( {lg5-1} \right )^{2}}"/>的值等于（ ）
①
<img class="kfformula" src="20190808/1565256297983776.png" data-latex="lg\frac {1} {5}"/>
②
<img class="kfformula" src="20190808/1565256297148379.png" data-latex="lg5-1"/>
③
<img class="kfformula" src="20190808/1565256297764160.png" data-latex="lg5"/>
④
<img class="kfformula" src="20190808/1565256297303551.png" data-latex="lg2"/>
【单选题】
计算<img class="kfformula" src="20200624/1592989794257208.png" data-latex="{9.8gH}_{2}{SO}_{4}" width="95" height="27"/>的物质的量为（ ）mol 。
①
0.5
②
1
③
0.1
④
0.2
【单选题】
如果<img class="kfformula" src="20190808/1565251013539366.png" data-latex="ab"/>，那么下列不等式正确的是（ ）
①
<img class="kfformula" src="20190808/1565251013586057.png" data-latex="\frac {1} {2}a\frac {1} {2}b"/>
②
<img class="kfformula" src="20190808/1565251013931183.png" data-latex="-3a-3b"/>
③
<img class="kfformula" src="20190808/1565251013130324.png" data-latex="5a5b"/>
④
<img class="kfformula" src="20190808/1565251013738499.png" data-latex="a-2b-2"/>
【单选题】
在正方体<img class="kfformula" src="20190809/1565328255613453.png" data-latex="ABCD\_ {A}_{1}{B}_{1}{C}_{1}{D}_{1}"/>中，<img class="kfformula" src="20190809/1565328255952220.png" data-latex="{A}_{1}B"/>与<img class="kfformula" src="20190809/1565328255653689.png" data-latex="AC"/>所成的角是（ ）
①
45°
②
60°
③
120°
④
90°
【单选题】
下列叙述中正确的是（ ）。①锌跟稀硫酸制取氢气，加入少量硫酸铜溶液能加快反应速率 ②镀层破坏后，白铁（镀锌的铁）比马口铁（镀锡的铁）更易腐蚀 ③钢铁表面常易锈蚀生成<img class="kfformula" src="20200629/1593420730606348.png" data-latex="{Fe}_{2}{O}_{3}\cdot {H}_{2}O" width="105" height="31"/>
①
②③
②
①
③
都正确
④
①③
【单选题】
在直角坐标系中，函数<img class="kfformula" src="20190808/1565254063454992.png" data-latex="y={x}^{2}+2"/>的图像（ ）
①
关于Y轴对称
②
关于原点对称
③
关于X轴对称
④
关于直线X=2对称
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