设[tex=9.643x3.357]ACpG7W/lXiEwdW69ASBj8z1DJ9cHYsnF6DhontRBX5qkLihRjn9eqf7Hb2y3J3dcH25PWpjTfqlI1wVyQLyVEpvuYLiMlDogvk35RT+LBI0=[/tex]则[tex=5.214x1.357]VRTvz6IuORTPL9eOuWVKGw==[/tex] 未知类型:{'options': ['0', '1', '[tex=6.571x3.357]7EJHVCtO2IWq3KpdB+jQsqLn5HoaSDznyXpWoOQKTZmlSTA1UWF/ZaROoyeXL6MjDWeDaM5C63nCLbmHWYCExvlLPsAfgY0fVGwawUCu27s=[/tex]', '[tex=6.571x3.357]7EJHVCtO2IWq3KpdB+jQsqLn5HoaSDznyXpWoOQKTZmVzDEKQwP9HpY/uN4treCV0cXLzwiCSn/ATS/2MQWZG8KiU0IgExA0pGtbvHRvYfU=[/tex]'], 'type': 102}
设[tex=9.643x3.357]ACpG7W/lXiEwdW69ASBj8z1DJ9cHYsnF6DhontRBX5qkLihRjn9eqf7Hb2y3J3dcH25PWpjTfqlI1wVyQLyVEpvuYLiMlDogvk35RT+LBI0=[/tex]则[tex=5.214x1.357]VRTvz6IuORTPL9eOuWVKGw==[/tex] 未知类型:{'options': ['0', '1', '[tex=6.571x3.357]7EJHVCtO2IWq3KpdB+jQsqLn5HoaSDznyXpWoOQKTZmlSTA1UWF/ZaROoyeXL6MjDWeDaM5C63nCLbmHWYCExvlLPsAfgY0fVGwawUCu27s=[/tex]', '[tex=6.571x3.357]7EJHVCtO2IWq3KpdB+jQsqLn5HoaSDznyXpWoOQKTZmVzDEKQwP9HpY/uN4treCV0cXLzwiCSn/ATS/2MQWZG8KiU0IgExA0pGtbvHRvYfU=[/tex]'], 'type': 102}
画出积分区域,把积分[tex=6.571x3.357]NQRb+IRtK3qYOgaO8TVJHAQf5a7jLjj5aAfdBn/BXkN4ngbyzAOjEGDXj4ULABWlo82zkic5PXiGHtvNtAaTIfDlceNEdcMQT+zoZ2iQx78=[/tex]表示为极坐标形式的二次积分,其中积分区域[tex=0.857x1.0]PvQ1rNj9zmhWbdNmDhnQhA==[/tex] 是:[tex=9.357x1.571]yVXsXSr0qy0zLnMue9g7By9lITdhd5acMl0F8P+IQNmzGIuPtJ4i8qmY1wkqI9JblNGVxNo1/CN/s8oBE4poWQ==[/tex]。
画出积分区域,把积分[tex=6.571x3.357]NQRb+IRtK3qYOgaO8TVJHAQf5a7jLjj5aAfdBn/BXkN4ngbyzAOjEGDXj4ULABWlo82zkic5PXiGHtvNtAaTIfDlceNEdcMQT+zoZ2iQx78=[/tex]表示为极坐标形式的二次积分,其中积分区域[tex=0.857x1.0]PvQ1rNj9zmhWbdNmDhnQhA==[/tex] 是:[tex=9.357x1.571]yVXsXSr0qy0zLnMue9g7By9lITdhd5acMl0F8P+IQNmzGIuPtJ4i8qmY1wkqI9JblNGVxNo1/CN/s8oBE4poWQ==[/tex]。
图示压杆体系中,弹簧支座刚度为[img=64x44]180379b3117202b.png[/img],则该体系的临界荷载为kl的( )倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中,弹簧支座刚度为[img=64x44]180379b3117202b.png[/img],则该体系的临界荷载为kl的( )倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中,弹簧支座刚度为[img=64x44]1802df48734317e.png[/img],则该体系的临界荷载为kl的( )倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中,弹簧支座刚度为[img=64x44]1802df48734317e.png[/img],则该体系的临界荷载为kl的( )倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
设[tex=9.357x3.357]w70lG1NUs5ZRhKHaXMaifahNYA2l55OVx/YI5vl5IU72HKwtXNzsk6KtTmWbwaw9OetIOTwjYQKMk36kR/5yeJZlqRGKk1OKIIQwOUd8cp8=[/tex],则=[tex=4.429x1.357]oyIqtAk8WXyxvsJBPfCZvOyPLYR6ymawLFLWKfDjlKk=[/tex][u] .[/u] 未知类型:{'options': ['0', '1', '[tex=6.571x3.357]GE56u9QCDTqcLxZ66HADyrlJDE3RRigI/3b4lMYIVNTEe6vPwZxkjnvqrTRoJlwfKPKU089z7xvnYBl7qWlwGY6/AFP8/kiPhStUJcrGwREnYeIzMnJsDaR1m/33MAxB[/tex]', '[tex=7.143x3.357]GE56u9QCDTqcLxZ66HADyrlJDE3RRigI/3b4lMYIVNTMRwyA1PKzGx8uOrxrouDleuRLzQQmMijdSlGfk4hmJq2zL0hX0zOG5P0G4uY3YKDDcndVC2qiRwBuhoqkVvHj[/tex]'], 'type': 102}
设[tex=9.357x3.357]w70lG1NUs5ZRhKHaXMaifahNYA2l55OVx/YI5vl5IU72HKwtXNzsk6KtTmWbwaw9OetIOTwjYQKMk36kR/5yeJZlqRGKk1OKIIQwOUd8cp8=[/tex],则=[tex=4.429x1.357]oyIqtAk8WXyxvsJBPfCZvOyPLYR6ymawLFLWKfDjlKk=[/tex][u] .[/u] 未知类型:{'options': ['0', '1', '[tex=6.571x3.357]GE56u9QCDTqcLxZ66HADyrlJDE3RRigI/3b4lMYIVNTEe6vPwZxkjnvqrTRoJlwfKPKU089z7xvnYBl7qWlwGY6/AFP8/kiPhStUJcrGwREnYeIzMnJsDaR1m/33MAxB[/tex]', '[tex=7.143x3.357]GE56u9QCDTqcLxZ66HADyrlJDE3RRigI/3b4lMYIVNTMRwyA1PKzGx8uOrxrouDleuRLzQQmMijdSlGfk4hmJq2zL0hX0zOG5P0G4uY3YKDDcndVC2qiRwBuhoqkVvHj[/tex]'], 'type': 102}
画出积分区域,把积分[tex=6.571x3.357]NQRb+IRtK3qYOgaO8TVJHAQf5a7jLjj5aAfdBn/BXkN4ngbyzAOjEGDXj4ULABWlo82zkic5PXiGHtvNtAaTIfDlceNEdcMQT+zoZ2iQx78=[/tex]表示为极坐标形式的二次积分,其中积分区域[tex=0.857x1.0]PvQ1rNj9zmhWbdNmDhnQhA==[/tex] 是:[tex=9.214x1.571]yVXsXSr0qy0zLnMue9g7By9lITdhd5acMl0F8P+IQNn2YLJ3HqmIsEIcGNHPGHS5d60ttiEhIqVKy8MjZ601Rg==[/tex][tex=3.0x1.286]Nl/NBNyCFpk+ZEqEEQBIIA==[/tex]。
画出积分区域,把积分[tex=6.571x3.357]NQRb+IRtK3qYOgaO8TVJHAQf5a7jLjj5aAfdBn/BXkN4ngbyzAOjEGDXj4ULABWlo82zkic5PXiGHtvNtAaTIfDlceNEdcMQT+zoZ2iQx78=[/tex]表示为极坐标形式的二次积分,其中积分区域[tex=0.857x1.0]PvQ1rNj9zmhWbdNmDhnQhA==[/tex] 是:[tex=9.214x1.571]yVXsXSr0qy0zLnMue9g7By9lITdhd5acMl0F8P+IQNn2YLJ3HqmIsEIcGNHPGHS5d60ttiEhIqVKy8MjZ601Rg==[/tex][tex=3.0x1.286]Nl/NBNyCFpk+ZEqEEQBIIA==[/tex]。
下列变量组()是一个闭回路。 A: {x,x,x,x,x,x} B: {x,x,x,x,x} C: {x,x,x,x,x,x} D: {x,x,x,x,x,x}
下列变量组()是一个闭回路。 A: {x,x,x,x,x,x} B: {x,x,x,x,x} C: {x,x,x,x,x,x} D: {x,x,x,x,x,x}
以下谓词蕴含式正确的是(): (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)
以下谓词蕴含式正确的是(): (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)
以下谓词蕴含式正确的是(): (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)
以下谓词蕴含式正确的是(): (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)
下列式中错误的是: A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)
下列式中错误的是: A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)