【单选题】【消耗次数：1】
等差数列<img class="kfformula" src="20190809/1565317844150977.png" data-latex="\left \{ {{a}_{n}} \right \} "/>的首项<img class="kfformula" src="20190809/1565317844698638.png" data-latex="{a}_{1}=-2"/>，<img class="kfformula" src="20190809/1565317844536248.png" data-latex="{S}_{3}=3"/>，那么（ ）
①
<img class="kfformula" src="20190809/1565317844862924.png" data-latex="d=3"/>
②
<img class="kfformula" src="20190809/1565317844935823.png" data-latex="d=2"/>
③
<img class="kfformula" src="20190809/1565317844903124.png" data-latex="d=-2"/>
④
<img class="kfformula" src="20190809/1565317844953331.png" data-latex="d=-3"/>
参考答案：
复制
纠错
相关题目
【单选题】
在采访中，记者既要"身入"，又要"心入"。"心入"，就是要有强烈的社会责任感， 要对客观事物进行由表及里的分析，还要().
①
A.广泛地接触群众
②
B.多方面地挖掘材料
③
C.细心地掂量各种材料的价值
④
D.细心地掂量各种材料的价值
【多选题】
Whatdoestheword"steal"(thelastpara.)mean?<br/>
【单选题】
已知<img class="kfformula" src="20190809/1565322050560879.png" data-latex="A\left ( {0，-2} \right )"/>，<img class="kfformula" src="20190809/1565322050489966.png" data-latex="B\left ( {x，6} \right )"/>的中点坐标为<img class="kfformula" src="20190809/1565322050782302.png" data-latex="\left ( {-1，y} \right )"/>，则<img class="kfformula" src="20190809/1565322050701271.png" data-latex="x"/>，<img class="kfformula" src="20190809/1565322050277662.png" data-latex="y"/>的值分别为（ ）
①
<img class="kfformula" src="20190809/1565322050358526.png" data-latex="x=-4，y=-2"/>
②
<img class="kfformula" src="20190809/1565322050607462.png" data-latex="x=2，y=4"/>
③
<img class="kfformula" src="20190809/1565322050656212.png" data-latex="x=-4，y=25"/>
④
<img class="kfformula" src="20190809/1565322050205695.png" data-latex="x=-2，y=2"/>
【单选题】
等差数列<img class="kfformula" src="20190809/1565315219717157.png" data-latex="\left \{ {{a}_{n}} \right \} "/>首项<img class="kfformula" src="20190809/1565315219801596.png" data-latex="{a}_{1}=1"/>，公差<img class="kfformula" src="20190809/1565315219560191.png" data-latex="d=-3"/>，当<img class="kfformula" src="20190809/1565315219192999.png" data-latex="{a}_{n}=-56"/>时，项数<img class="kfformula" src="20190809/1565315219715609.png" data-latex="n"/>等于（ ）
①
18
②
19
③
20
④
21
【单选题】
在数列<img class="kfformula" src="20190809/1565316783973080.png" data-latex="\left \{ {{a}_{n}} \right \} "/>中，前<img class="kfformula" src="20190809/1565316783992384.png" data-latex="n"/>项和公式是<img class="kfformula" src="20190809/1565316783683277.png" data-latex="{s}_{n}=4{n}^{2}-n"/>，那么<img class="kfformula" src="20190809/1565316783325652.png" data-latex="{a}_{2}"/>为（ ）
①
3
②
17
③
11
④
14
【单选题】
<img class="kfformula" src="20190809/1565313651838733.png" data-latex="\sqrt {7}+\sqrt {3}"/>与<img class="kfformula" src="20190809/1565313651801618.png" data-latex="\sqrt {7}-\sqrt {3}"/>的等比中项是（ ）
①
<img class="kfformula" src="20190809/1565313651278262.png" data-latex="4"/>
②
<img class="kfformula" src="20190809/1565313651577788.png" data-latex="\pm 4"/>
③
<img class="kfformula" src="20190809/1565313651689008.png" data-latex="\pm 2"/>
④
<img class="kfformula" src="20190809/1565313651298877.png" data-latex="2"/>
【单选题】
执行下面程序：main(){intx=1,y=1,z=1;x=x+++y+++z++;printf("%d,%d,%d",x,++y,z++);}输出的结果为（）
①
4，3，2
②
3，3，2
③
3，3，3
④
3，2，2
【单选题】
在等差数列<img class="kfformula" src="20190809/1565316326247415.png" data-latex="\left \{ {{a}_{n}} \right \} "/>中，<img class="kfformula" src="20190809/1565316326513469.png" data-latex="{a}_{1}=2"/>，<img class="kfformula" src="20190809/1565316326731066.png" data-latex="d=-2"/>，则前十项的和为（ ）
①
-90
②
-70
③
110
④
220
随机题目
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”He is proud to fight for justice and freedom.
①
正确
②
错误
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”I am a teacher and my sister is a doctor.
①
正确
②
错误
【判断题】
If you put yourself in the customers shoes, you may realize why the thing isnt selling.划线部分应该翻译成“把鞋送到顾客家里”
①
正确
②
错误
【多选题】
She collected_____________ fishes for the British Museum.
①
different types of
②
different kinds of
③
various kinds of
④
many kinds of
【单选题】
This will be a good____________ for us to exchange experience.
①
opportunity
②
question
③
attitude
④
exercise
【单选题】
After Whitneys idea was applied to automobile production, each part____________ had to be made by hand.
①
no more
②
no more than
③
no less than
④
no longer
【单选题】
Between 1990 and 2000, the population of the United States increased____________ 33 million people.
①
in
②
at
③
on
④
by