• 2021-04-14
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  • 本题目来自[网课答案]本页地址:https://www.wkda.cn/ask/xppomaxoeyopxoo.html

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    • 0

      A是n阶实方阵,则A是正交矩阵的充要条件时( ) 未知类型:{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_160765c0-82ae-41e7-92cc-7f9f38df73cf.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_f91bd7e2-e47b-421c-a1f4-c37277340526.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_0156ee63-63f2-4377-90e7-ee87b08fc01b.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_bb7bc755-5c94-491e-9545-af103b5d2bf3.png"]'], 'type': 102}

    • 1

      设A,B为任意两个n阶方阵,则下列一定成立的是 ( ) 未知类型:{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_33399133-78a2-46d1-b0e6-585d3e1a61fa.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_d308b840-8167-4c60-98c2-50ad54a58d80.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_0836c6f0-9141-4013-8ffa-bd3be454df0a.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_46c561a2-1836-4982-9c80-e1bbc2dc9af1.png"]'], 'type': 102}

    • 2

      <img src="http://edu-image.nosdn.127.net/7C967829F4C605BD5700F98BFAF57A1B.jpg?imageView&thumbnail=890x0&quality=100" />? 错误|错误|错误|<img src="http://edu-image.nosdn.127.net/FB19BA6F6B1487CE68F33429508760F3.jpg?imageView&thumbnail=890x0&quality=100" />

    • 3

      设三阶方阵A的秩是2,则与A等价的矩阵为( ) 未知类型:{'options': ['&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2a68ab7b-9b7e-4607-abde-e255189c845c.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_208fb5a8-85c0-4a53-8cf2-673752bf5034.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_08c0964d-f78b-44eb-ac06-5c18ec1142e0.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_3d5b7bfd-bef2-4920-8749-90e0f59a4770.png"&#93;'], 'type': 102}

    • 4

      钾的光电效应红限波长是550nm,求钾的电子逸出功 未知类型:{'options': ['&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_4b0c6df6-936e-48d6-a6f7-4af90f48b3eb.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_6abcc1e9-f459-4f9d-8cfa-a3d67a1aeb1f.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_5536ce6e-6fcc-40c8-97b0-8fdbbc084c82.png"&#93;', '&#91;img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2e4b3c88-95cf-499d-8b31-ef18d5ecaab4.png"&#93;'], 'type': 102}