• 2022-07-23
    在正弦电路中电感元件的伏安关系正确的表达式有( ).
    未知类型:{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_c6a347e9-fd90-4581-a901-f9de2334a286.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_f3da8588-c064-470f-b4f4-a3764cf71c54.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_7875a3b4-9354-4b98-820b-367df2fa299a.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_7453857f-ce3b-4fb2-b72a-11ae2f7b6ce1.png"]'], 'type': 102}
  • B

    举一反三

    内容

    • 0

      设某种气体的分子速率分布函数为f(v),则速率在v1-v2区间内的分子平均速率为 未知类型:{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_4c30e9fe-5d04-4fc8-9957-2805655c8cf0.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_e46a2d3c-c302-4e0e-b7f1-dbda05263391.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_236231d7-a42e-4a27-ad17-4fa25ffa0243.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_aa7899be-ed45-4d9c-a3c7-785ff01d6664.png"]'], 'type': 102}

    • 1

      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}

    • 2

      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}

    • 3

      [img src="http://edu-image.nosdn.127.net/08446072FAF419F6F5FB52568347381A.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100"][img src="http://edu-image.nosdn.127.net/950BA54637600A69A19C15A66AC36500.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100"] A: -4 B: +2 C: -1 D: -2

    • 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': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_4b0c6df6-936e-48d6-a6f7-4af90f48b3eb.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_6abcc1e9-f459-4f9d-8cfa-a3d67a1aeb1f.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_5536ce6e-6fcc-40c8-97b0-8fdbbc084c82.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2e4b3c88-95cf-499d-8b31-ef18d5ecaab4.png"]'], 'type': 102}