【单选题】【消耗次数：1】
正四棱锥底面边长是2，高是1，则斜高是（）
①
img class=kfformula src=zzximg/20190809/1565327137897917.png data-latex=\sqrt {2}/
②
img class=kfformula src=zzximg/20190809/1565327137840495.png data-latex=\sqrt {3}/
③
img class=kfformula src=zzximg/20190809/1565327137707931.png data-latex=2/
④
img class=kfformula src=zzximg/20190809/1565327137411071.png data-latex=\sqrt {5}/
参考答案：
复制
纠错
相关题目
【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】
正五棱锥的底面积是img class=kfformula src=zzximg/20190809/1565328530277328.png data-latex=26{cm}^{2}/，高是img class=kfformula src=zzximg/20190809/1565328530106797.png data-latex=6cm/，则其体积是（ ）。
①
img class=kfformula src=zzximg/20190809/1565328531496628.png data-latex=156{cm}^{3}/
②
img class=kfformula src=zzximg/20190809/1565328531242148.png data-latex=78{cm}^{3}/
③
img class=kfformula src=zzximg/20190809/1565328531884474.png data-latex={52cm}^{3}/
④
img class=kfformula src=zzximg/20190809/1565328531591499.png data-latex=104{cm}^{3}/
【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】
在数列img class=kfformula src=zzximg/20190809/1565316783973080.png data-latex=\left \{ {{a}_{n}} \right \} /中，前img class=kfformula src=zzximg/20190809/1565316783992384.png data-latex=n/项和公式是img class=kfformula src=zzximg/20190809/1565316783683277.png data-latex={s}_{n}=4{n}^{2}-n/，那么img class=kfformula src=zzximg/20190809/1565316783325652.png data-latex={a}_{2}/为（ ）
①
14
②
3
③
11
④
17
【单选题】
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"/>
【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】
正五棱锥的底面积是<img class="kfformula" src="20190809/1565328530277328.png" data-latex="26{cm}^{2}"/>，高是<img class="kfformula" src="20190809/1565328530106797.png" data-latex="6cm"/>，则其体积是（ ）。
①
<img class="kfformula" src="20190809/1565328531591499.png" data-latex="104{cm}^{3}"/>
②
<img class="kfformula" src="20190809/1565328531884474.png" data-latex="{52cm}^{3}"/>
③
<img class="kfformula" src="20190809/1565328531242148.png" data-latex="78{cm}^{3}"/>
④
<img class="kfformula" src="20190809/1565328531496628.png" data-latex="156{cm}^{3}"/>
【单选题】
两条平行直线img class=kfformula src=zzximg/20190809/1565322829875215.png data-latex=3x+4y-7=0/img class=kfformula src=zzximg/20190809/1565322829154016.png data-latex=3x+4y+8=0/之间的距离是（ ）
①
img class=kfformula src=zzximg/20190809/1565322829833725.png data-latex=\frac {1} {5} width=87 height=63/
②
img class=kfformula src=zzximg/20190809/1565322829406438.png data-latex=15/
③
img class=kfformula src=zzximg/20190809/1565322829721740.png data-latex=3\sqrt {2}/
④
img class=kfformula src=zzximg/20190809/1565322829886592.png data-latex=3/
【单选题】
在正方体img class=kfformula src=zzximg/20190809/1565328255613453.png data-latex=ABCD\_ {A}_{1}{B}_{1}{C}_{1}{D}_{1}/img class=kfformula src=zzximg/20190809/1565328255952220.png data-latex={A}_{1}B/img class=kfformula src=zzximg/20190809/1565328255653689.png data-latex=AC/所成的角是（ ）
①
45°
②
60°
③
90°
④
120°
【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
随机题目
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A68A65205B1BAC4AA46A3A1869250DE4.png title=QQ图片20160108173533.png alt=QQ图片20160108173533.png/><img src=https://huaweicloudobs.ahjxjy.cn/ECB1F19EE76FA760B58611FB08747D51.png title=QQ图片20160108173551.png alt=QQ图片20160108173551.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/B0C584185CD7111F0104DDB5782B8D2C.png title=QQ图片20160108173600.png alt=QQ图片20160108173600.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/B6D6FAC8C3C0C1861571BB4E5966B9D8.png title=QQ图片20160108173609.png alt=QQ图片20160108173609.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/8FAE17C37FE8A266EB216070F4BE6C1C.png title=QQ图片20160108173618.png alt=QQ图片20160108173618.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/18C0A0C884DA8DCF17CDC93926EB1090.png title=QQ图片20160108173627.png alt=QQ图片20160108173627.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F788A05E0E24DC7B8B19ABF67E354934.png title=1.png alt=1.png/>=( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/93E9FA4EC36C0E17A4A0A8C7D1F9240E.png title=a.png alt=a.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/B0D249A76B25E348F9C671C924D80873.png title=b.png alt=b.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/4B0803E7A2D258DC882E8FBFCBFF0351.png title=c.png alt=c.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/14519275C20924F805529219103A1D80.png title=d.png alt=d.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/BB9B03A502EC6D3BD0FE7C5BC748303C.png style=vertical-align: middle;/>
①
A的列秩等于零
②
A的秩为零
③
A的任一列向量可由其他列向量线性表示
④
A中必有一列向量可由其他列向量线性表示
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/AF232A580135AAF46EB8BD9DC75CD481.png style=vertical-align: middle;/>
①
ACB
②
BAC
③
CAB
④
CBA
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/56BDC0D59A0699903005B3D2E6060B98.png title=QQ图片20160108162428.png alt=QQ图片20160108162428.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/A0C4768A3FDB0AD9531B15E00E86D516.png title=QQ图片20160108162437.png alt=QQ图片20160108162437.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/289E84ADB4513D8039DA1BE85366AEA4.png title=QQ图片20160108162447.png alt=QQ图片20160108162447.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/11D9D5D2C4389C493557CA52FA43869B.png title=QQ图片20160108162456.png alt=QQ图片20160108162456.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/E0E9DA84C0BAFD0E6A50514231D18777.png title=QQ图片20160108162506.png alt=QQ图片20160108162506.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/EACBDB7AACB6CCFD57D69BB2531D09DE.png title=QQ图片20160108162109.png alt=QQ图片20160108162109.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/7C76BFCC5F8A393F2B935BDEA9D78EF1.png title=QQ图片20160108162120.png alt=QQ图片20160108162120.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/B96167ADDEFC695A4870459C2BF7897A.png title=QQ图片20160108162132.png alt=QQ图片20160108162132.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/7A9A01991C504EFCFA4FCF2560EA784F.png title=QQ图片20160108162144.png alt=QQ图片20160108162144.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/EFD05D802E5F910C608A613EC6336438.png title=QQ图片20160108162153.png alt=QQ图片20160108162153.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E2D354A08A29E90E16421D5F692303C1.png title=5.png alt=5.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E168557F0B5112A6A1E9420CEDE49CC9.png title=a.png alt=a.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/825C09CFF4EC43FF835CE4434F37094F.png title=b.png alt=b.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/1C5CEE463223260D2110DD2C9550EE8A.png title=c.png alt=c.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/68FB193BE1BF9B5182F13D7C7A4B05BD.png title=d.png alt=d.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/5A88142DBE03FBB8EEC12AB140C1DA25.png title=1.png alt=1.png/>( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/947D595D5B2DE5F941FD36FEDBB487D4.png title=a.png alt=a.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/FABA4CADBA2B51E1B4A3DA61E45B6285.png title=b.png alt=b.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/7F6F55E5BF686D5CC4FD5A7F1789D450.png title=c.png alt=c.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/6311E316B10C26058CFD7EB46E28BAB5.png title=d.png alt=d.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/06CE430A662CABFF49AAD91F6F41B2C7.png title=QQ图片20160108162851.png alt=QQ图片20160108162851.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/DD88D14D9791449AF9001FE985E2ADF1.png title=QQ图片20160108162902.png alt=QQ图片20160108162902.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/1AF92D87974230345A88EA747E56F5DA.png title=QQ图片20160108162911.png alt=QQ图片20160108162911.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/CB5017ADD4444F1CB020BD81CFAF28C1.png title=QQ图片20160108162928.png alt=QQ图片20160108162928.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/B649C0936660DF93A9BF8C4B9327D2EB.png title=QQ图片20160108162936.png alt=QQ图片20160108162936.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/214F775C825EF6C59BCFC1C818ECB3DA.png title=QQ图片20160108162707.png alt=QQ图片20160108162707.png/>
①
１
②
－１
③
０
④
２