【单选题】【消耗次数：1】
下图所示结构的弯矩图形状应为（ ）。<img src=https://huaweicloudobs.ahjxjy.cn/FCEAB6F5F6EBD6D8859B6F68E8E7920A.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F8F1661FAAEF8E51F25191E56660E07B.png title=3.png alt=3.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/5CF87F063285D8F9C943A7A1C059DD98.png title=4.png alt=4.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/9C4BE8EBBB82949EFEAFE2991DE07FC4.png title=5.png alt=5.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/74DADDBFB7F9682A5A05BDA5F282EF23.png title=6.png alt=6.png/>
参考答案：
复制
纠错
相关题目
【多选题】
<img src=https://huaweicloudobs.ahjxjy.cn/4D5521BCE006BBBAE834384DADF96091.png title=4.png alt=4.png/><img src=https://huaweicloudobs.ahjxjy.cn/799E99B7DB75195CAD99E4EF4B2A19F0.png title=5.png alt=5.png/><img src=https://huaweicloudobs.ahjxjy.cn/6668CDF06F182778DCCC9EC63F32E8B4.png title=6.png alt=6.png/>,下列表述正确的是
①
<img src=https://huaweicloudobs.ahjxjy.cn/D195ABE3F114C8923C2FF243B91B95D9.png title=7.png alt=7.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C78C68FAF288F7E8A9D9778AC90CE5DA.png title=8.png alt=8.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/3F7B2210DC17A1BE97CC498E894146DE.png title=9.png alt=9.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/E8C41008391518AB353BE781F11BDB6A.png title=10.png alt=10.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F70B5E6EF7858571F8FC3C4C8D006852.png title=7.png alt=7.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/FAFF1284C76D6D67D8A6541DDF808276.png title=7-1.png alt=7-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/03AA71A09C342B56453F8157D51BFFDA.png title=7-2.png alt=7-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/10E9A0C3809C0B875299F3823EA70186.png title=7-3.png alt=7-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/10F2B358614D55FBF3860DB033021A97.png title=7-4.png alt=7-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/05F1E336D4DB1D8D74DE53F521940B0C.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/1EE9E836B7A4EC23DA3213A20979B67A.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/A18AEB55D7B2E139EA54F72F0E2996C0.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/A25EC92ACC9E5BBD1359C04717718823.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A2A8F239096DC2B1B464A725092429AE.png title=6-4.png alt=6-4.png/>
【多选题】
<img src=https://huaweicloudobs.ahjxjy.cn/6ED6D2FB01B4ECC5D6DDF9F850E0AE42.png title=7.png alt=7.png/><img src=https://huaweicloudobs.ahjxjy.cn/20F9D6170587EDA4C64F36BAFE91C289.png title=8.png alt=8.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/FC072071BE30D785E1E9D3C0C6DC23FA.png title=12.png alt=12.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C4180BC6D69C69221A5A45A4532C5475.png title=13.png alt=13.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/07624451B02C04C93B32CAD0810A4A60.png title=14.png alt=14.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/425E82C9FBB555C71DF8A9E386DB1674.png title=9.png alt=9.png/><img src=https://huaweicloudobs.ahjxjy.cn/F189577D1DB0CB47D0B222D7E3E081CC.png title=10.png alt=10.png/><img src=https://huaweicloudobs.ahjxjy.cn/9125E5FCA2C763BFC81669EBF5E2CAD1.png title=11.png alt=11.png/>
【判断题】
<img src=https://huaweicloudobs.ahjxjy.cn/98EF0D24F3CD275A3797817D8BB308E5.png title=5.png alt=5.png/><img src=https://huaweicloudobs.ahjxjy.cn/F68FDC366238511C2C2D19C8EFD6B98A.png title=6.png alt=6.png/>
①
正确
②
错误
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/6F552E5E2A346C5B0009F8C8F4BD4C88.png title=13.png alt=13.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/10549A87944187D69B7BC2C3A7EC61B1.png title=13-1.png alt=13-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/F8A36EE6835C30A2A2E121B0598773EE.png title=13-2.png alt=13-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/51CB4CD46CBCA11D81998FD57E0BBEA1.png title=13-3.png alt=13-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/9BF8042294C2E45BFEAE388B0ADC9B2D.png title=13-4.png alt=13-4.png/>
【多选题】
<img src=https://huaweicloudobs.ahjxjy.cn/DF8F69F655E78E4135AC3021CDC7271E.png title=1.png alt=1.png/><img src=https://huaweicloudobs.ahjxjy.cn/F7917C42483D4B4EB3AFA503705443DE.png title=7.png alt=7.png/><img src=https://huaweicloudobs.ahjxjy.cn/77F20DCCE4501B2AF8CE94213944843F.png title=9.png alt=9.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/031AF786D9AAFDC6194CB49BCD33E128.png title=3.png alt=3.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/FBC5ADDF51D26212F24F96E31FA8311B.png title=4.png alt=4.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/3483CF233B84B6DAFCB8829133112C52.png title=5.png alt=5.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/311A417933B9B3EBA7EC103876394643.png title=6.png alt=6.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E25E17DBCB632CE53195B4F9DEDAB8C4.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F0E857790FE7E5802B3C3ED944582F18.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/CE6F13652F621798B1A2C32C759A402C.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/3AAA30E033A5A14230A716FFD0D33BA1.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A6D6B412EC6398FB16E6630F7F223435.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/62F7D0C8F5F6E07FFCA0AAD9C80517C4.png title=19.png alt=19.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/C072AA8ADF47E360C9C722853FDE48A1.png title=19-1.png alt=19-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/602DE428CB8A6819C1D9694AF646EFF2.png title=19-2.png alt=19-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/1E4FFFEF27D9F12D70A8F5280A09311B.png title=19-3.png alt=19-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/302E087B7141F67E8717A778BCBC4AF7.png title=19-4.png alt=19-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/8F66F27927D951277CB23E07DC382B6A.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/5EBC3556601250C7095982547E415062.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/19656F1422DA1BCF5FB040A79B43DC13.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/4F4DA71BB28FBB9AD60972E2CFFF5306.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A51FB03B5BBD04C6044583D819ABF70B.png title=3-4.png alt=3-4.png/>
随机题目
【单选题】
在下列结果中，构成概率分布的是（）
①
<imgwidth="194"height="41"v:shapes="_x0000_i1163"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image226.png">
②
<imgwidth="212"height="41"v:shapes="_x0000_i1164"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image228.png">
③
<imgwidth="180"height="41"v:shapes="_x0000_i1165"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image230.png">
④
<imgwidth="184"height="41"v:shapes="_x0000_i1166"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image232.png">
【单选题】
若<imgwidth="56"height="22"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image240.png">，则<imgwidth="16"height="18"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image220.png">的特征值为（）
①
<imgwidth="22"height="18"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image242.png">或<imgwidth="10"height="18"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
②
<imgwidth="14"height="20"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image246.png">或<imgwidth="10"height="18"v:shapes="_x0000_i1202"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
③
<imgwidth="14"height="20"v:shapes="_x0000_i1203"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image246.png">
④
<imgwidth="10"height="18"v:shapes="_x0000_i1204"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
【单选题】
袋中有5个球（3新2旧），每次取1个，无放回的抽取2次，则第2次取到新球的概率为（）
①
<imgwidth="14"height="41"v:shapes="_x0000_i1215"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image315.png">
②
<imgwidth="16"height="41"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image317.png">
③
<imgwidth="16"height="41"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image319.png">
④
<imgwidth="21"height="41"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image321.png">
【单选题】
设<imgwidth="75"height="22"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image314.png">是来自正态总体<imgwidth="60"height="22"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image290.png">的样本，则<imgwidth="98"height="40"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image316.png">服从的分布为（）
①
<imgwidth="37"height="22"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image318.png">
②
<imgwidth="58"height="22"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image320.png">
③
<imgwidth="63"height="40"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
④
<imgwidth="63"height="40"v:shapes="_x0000_i1226"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
【单选题】
已知<imgwidth="18"height="18"v:shapes="_x0000_i1285"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">是<imgwidth="14"height="16"v:shapes="_x0000_i1286"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image264.png">阶方阵，且<imgwidth="70"height="28"v:shapes="_x0000_i1287"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image305.png">，则<imgwidth="18"height="18"v:shapes="_x0000_i1288"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">的<imgwidth="14"height="16"v:shapes="_x0000_i1289"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image264.png">个行向量中（）
①
任意<imgwidth="14"height="14"v:shapes="_x0000_i1290"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量线性无关
②
必有<imgwidth="14"height="14"v:shapes="_x0000_i1291"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量线性无关
③
任一行向量都可由其余<imgwidth="36"height="18"v:shapes="_x0000_i1292"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image364.png">个行向量线性表出
④
任意<imgwidth="14"height="14"v:shapes="_x0000_i1293"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量都为极大无关组
【单选题】
设<imgwidth="18"height="18"v:shapes="_x0000_i1203"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1204"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">是<imgwidth="14"height="16"v:shapes="_x0000_i1205"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">阶矩阵，则下列命题成立的是（）
①
<imgwidth="18"height="18"v:shapes="_x0000_i1206"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1207"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价则<imgwidth="18"height="18"v:shapes="_x0000_i1208"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1209"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似
②
<imgwidth="18"height="18"v:shapes="_x0000_i1210"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1211"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似则<imgwidth="18"height="18"v:shapes="_x0000_i1212"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1213"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价
③
<imgwidth="18"height="18"v:shapes="_x0000_i1214"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1215"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价则<imgwidth="18"height="18"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">合同
④
<imgwidth="18"height="18"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似则<imgwidth="18"height="18"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">合同
【单选题】
设随机变量<imgwidth="90"height="25"v:shapes="_x0000_i1078"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image084.png">，则<imgwidth="74"height="19"v:shapes="_x0000_i1079"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image086.png">服从（）
①
<imgwidth="64"height="25"v:shapes="_x0000_i1080"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image088.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1081"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image090.png">
③
<imgwidth="80"height="41"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image092.png">
④
<imgwidth="108"height="25"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image094.png">
【单选题】
下列结论正确的是（）
①
奇异矩阵经过若干次初等变换可以化为非奇异阵
②
非奇异阵经过若干次初等变换可以化为奇异矩阵
③
非奇异等价于单位阵
④
<imgwidth="214"height="22"v:shapes="图片_x0020_120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image127.png">
【单选题】
齐次线性方程组<imgwidth="60"height="20"v:shapes="_x0000_i1362"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image448.png">，其中<imgwidth="18"height="18"v:shapes="_x0000_i1363"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">是<imgwidth="38"height="20"v:shapes="_x0000_i1364"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image451.png">的矩阵，<imgwidth="22"height="18"v:shapes="_x0000_i1365"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image453.png">是<imgwidth="36"height="18"v:shapes="_x0000_i1366"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image455.png">的列向量则（）
①
仅有零解
②
必有非零解
③
无解
④
可能有非零解
【单选题】
<imgwidth="223"height="87"v:shapes="图片_x0020_131"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image129.png">
①
<imgwidth="219"height="34"v:shapes="图片_x0020_132"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image130.png">
②
<imgwidth="53"height="31"v:shapes="图片_x0020_133"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image131.png">
③
<imgwidth="90"height="33"v:shapes="图片_x0020_134"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image132.png">
④
<imgwidth="57"height="26"v:shapes="图片_x0020_135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image133.png">