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举一反三
- 设[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_067016aa-77f2-4aff-bd36-e3fa5f1bd893.png"],[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_358ab06c-7f19-4ae6-ba82-424c72bd4d18.png"],则[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2b561af0-b65d-4e5e-936b-72b15b4f0f56.png"][img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_92284d1b-6fe3-4dc1-a732-618796cd01a4.png"] A: 6 B: 10 C: 8 D: 4
- 若<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_5e87b1af-bca5-443b-a243-291827849f02.png" />,则<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_ad6fa5ac-dbcf-4b8b-8daa-181c5a784826.png" />的初值<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_db6a652c-73b6-49f0-aa72-b78bfc327b03.png" />为? 0|不存在|1<br >|-1
- 下列矩阵，哪一个是正交矩阵（ ） 未知类型：{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_e3bcbe32-bf4f-4dd7-87eb-435166d4a694.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2dd5a805-5f17-4578-950f-b0e99cb4ace5.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_fb404ce8-29fb-4a21-9f66-2e1cc1e8e6b2.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_6238ef9e-3ec5-4c01-8429-4fbbb82bc5ff.png"]'], 'type': 102}
- 以下对相关系数与回归系数的描述正确的是 未知类型：{'options': ['[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_a239429a-7fee-4b87-8988-34ecbff62f78.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_8e840276-5eb5-496e-99e5-dbf0fc08a23b.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_44c8e13f-08e0-425a-b275-0409b8954e16.png"]', '[img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_b013f5a5-447f-46ad-89ec-f4a2c5927468.png"]'], 'type': 102}
- 对于不同柔度的塑性材料压杆，其最大临界应力将不超过材料的（ ）。 A: 比例极限<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_46e217f6-4801-4de3-838b-1ef9d8683f04.png"> B: 弹性极限<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_2999d238-6413-4354-8c17-705d258519c4.png"> C: 强度极限<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_da3bc35f-38ae-4b4d-a9bf-4355200cad9b.png"> D: 屈服极限<img src="http://edu-image.nosdn.127.net/_PhotoUploadUtils_1e12ef4a-90e8-4102-b0e8-e409f85e7a72.png">