【多选题】【消耗次数：1】
矩阵的三种初等变换是
①
<img src=https://huaweicloudobs.ahjxjy.cn/8D1FA5FF7FD27CB9E4694A779ED15C79.png title=1.png alt=1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/529B3C0D275D02E67605C3E111A0973B.png title=2.png alt=2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/45B6F249416562FB2760DBA7DF288F2A.png title=4.png alt=4.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/06CF7DBEB86A6E3F6C55567E0F354148.png title=3.png alt=3.png/>
参考答案：
复制
纠错
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①
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②
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③
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③
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④
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【单选题】
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③
<img src=https://huaweicloudobs.ahjxjy.cn/74B78581095A22F88DDA8A4CAA34704C.png title=3-3.png alt=3-3.png/>
④
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【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/>
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②
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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/>
【多选题】
<img src=https://huaweicloudobs.ahjxjy.cn/4E166ABC7D8D9CB2B0224265159981AF.png title=11.png alt=11.png/><img src=https://huaweicloudobs.ahjxjy.cn/24E0907ED0230C3FE1B001D96DCA0640.png title=3.png alt=3.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/4E8F93EAAFB8DF486EC87E8B24398064.png title=15.png alt=15.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/DA4B0B0D0E4F2CB097E82CDC0F26256A.png title=14.png alt=14.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/CECFB04B26C2A732E726F03703F898D9.png title=13.png alt=13.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/C6ED86060FEC93DF6A569EECF1362476.png title=12.png alt=12.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/B3ECAFF87168F98F6469D2D7CA43E7A6.png title=1.png alt=1.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/324091786B409C042052ADE5DAC17D31.png title=1-1.png alt=1-1.png/>
②
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③
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④
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【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/265846F6D50C0338CBD1E2519B1F41D3.png title=4.png alt=4.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/0B597BE8BDA0B795349190D9DBC4F166.png title=4-1.png alt=4-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/BABAC19A382691F6DEAF2E5343DB4858.png title=4-2.png alt=4-2.png/>
③
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④
<img src=https://huaweicloudobs.ahjxjy.cn/D30017D259D1619D58BFB18400BF5522.png title=4-4.png alt=4-4.png/>
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正确
②
错误
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/B3F81E02A1E4FBDDFEE238B40CB3D8E5.png title=1.png alt=1.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F6E3C2E4CB84849368F804C33DDE02B6.png title=1-1.png alt=1-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/381D356C264547244A4F56B1D367A4AD.png title=1-2.png alt=1-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/A87B6CEA2690F666284EABC193FAB608.png title=1-3.png alt=1-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/EF10C1BBD3F39F2C35896FFFA29DCE89.png title=1-4.png alt=1-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/5F1F3A5E288C2DF0D6957B19B8077CDC.png title=7.png alt=7.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/135A3D7E0A552830EE41960893992FE0.png title=7-1.png alt=7-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/7275549704CE435B8368C8E3AE7C8F77.png title=7-2.png alt=7-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/D19D1832E91899259236D762EA356DC5.png title=7-3.png alt=7-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/F87A50E87EAAE842C3C36B842B83329C.png title=7-4.png alt=7-4.png/>
随机题目
【单选题】
王国维在论述做学问、成大事的三个境界时，曾摘编宋代三位词人的名句，辑录成如下一段名言：“昨夜西风凋碧树，独上高楼，望断天涯路。衣带渐宽终不悔，为伊消得人憔悴。众里寻他千百度，蓦然回首，那人却在灯火阑珊处。”这三位作家 是（ ）
①
晏殊、柳永、辛弃疾
②
晏殊、秦观、陈亮
③
晏几道、贺铸、柳永
④
晏几道、周邦彦、辛弃疾