设[tex=0.643x1.286]ZsZs11iKEvfmzDIurZth8g==[/tex]阶方阵[tex=2.0x1.286]cdFQTIcX/k6W15SnnVIOSQ==[/tex]对应的伴随矩阵分别为[tex=2.786x1.286]Ih6DdOteTDQD0IahSuDV+MNSgXPTuu1Ja8QyRKdAvZY=[/tex]，分块矩阵[tex=6.714x2.786]Nw/iCPiBfAazOGg7nvEajlIw5jl+RO2SmNA9Qn1esVrtkE61ENUIdDPBRH6LlIjO5nrmgJINYZl9Mz/vn8A77g==[/tex]，则[tex=0.786x1.286]TKU5UzNEMzEJwORo6mbEYA==[/tex]的伴随矩阵[tex=2.286x1.286]u8qm2vC3bRLP5hGbGpXdxQ==[/tex][input=type:blank,size:6][/input] . 未知类型：{'options': ['[tex=8.571x3.357]075gCzZzsMRb6HYXYk9X9990UXSwhC4aS30j1YPiTgm3hmsejR/bK2E8n1cVIljP7h60RdT5WNUgHpIYQoHRjpKcCKdCYJ5JVFXKNxTEYz8=[/tex]', '[tex=8.571x3.357]075gCzZzsMRb6HYXYk9X987kyvm6Bsv7fv0XQqco2wEnlTNuea0WEb/NW+27Jyq1Wafep6VDoei2pagyRySH9WiMqBoCRNZdNWUvJBmha+4=[/tex]', '[tex=8.571x3.357]075gCzZzsMRb6HYXYk9X91WL96pCMLEUzVoc6/gfhbPbPJbu++pGgO7iJGvPdZgyFUfh2R3zWya9FQcxBpm2BTnPH+YrqimmpYUrtpd7UoA=[/tex]', '[tex=8.571x3.357]075gCzZzsMRb6HYXYk9X9+YJAcVgyDBoIsVPDf3JvYmjIdJkhb05eI5c1c7O7acymrJ1qew3k4pHA1Hx97MhOcjokDjvPmd3LFt0w27+ji8=[/tex]'], 'type': 102}

设 [tex=2.0x1.214]vnzjVhyzo/NIhVUgFyjLlA==[/tex] 为方阵, 分块对角矩阵 [tex=6.714x2.786]0g5vxaagmyEBQHxTGP3jN2VoaOtQylKsBnkDfuWhnLbwKIVU9iV7j6z48P0ekjRk43nHFbMK8pmS3G1llLDtcw==[/tex], 则 [tex=1.214x1.071]dr0qgXvnpwExtnW5rP7bRg==[/tex]=  未知类型：{'options': ['[tex=5.643x2.786]jcCMHflCR8OS9TosV6N5vLbobXPbtoK0+9cGlXGFMC5lM0oyR04ENfunglKk2MRjMxaRDmoUfgZjnwMDFWA/KTADWUZXsbF6bibBvLXu27Q=[/tex]', '[tex=8.571x3.357]jcCMHflCR8OS9TosV6N5vESHusIxR+UTCz/PsdNhkITF5Np/xjr5zbHvcVbAYFGIoHXLm85LEiFrEl5mSWxn52bxPGTP2ZOM5woSZ46Pp1M=[/tex]', '[tex=8.571x3.357]jcCMHflCR8OS9TosV6N5vDjFHfqRN7dd7d9/H/AA1+hAMXUvyXRdna2HgEFNvfMW8Nh7a+gx8rldRq+cuIcbQmtohrGXfQkf5k9T56KHfaE=[/tex]', '[tex=11.214x3.357]jcCMHflCR8OS9TosV6N5vOs3C54PHTR/zwmQp00bR3a0atmY9rHFxLEvJyI/MBbtTaY/no1hs5Lmfomj1BAOND3Cx+b4tkob12MN7XLEa8C9tNzl5ISblWpM2WrhwpVH[/tex]'], 'type': 102}

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

计算三重积分[tex=8.571x3.357]ccd1gA3mRg3SIB6B30l+EkTieJrPF2FHF4NFqGlHUf5jo62DP09EkNxQU69CDma9[/tex]，其中[tex=0.714x1.286]1YkIdjxXLHdjdjLEO+eusQ==[/tex]是由曲面[tex=5.643x1.429]v5CIe7m07RqhEGvV8iM5xxcbvm4JmW8B8S2rkWCTp5Q=[/tex]与平面[tex=2.286x1.286]NGblVJ4MOxCzYWTiKwrJpw==[/tex]和[tex=2.286x1.286]hW5Ac29gcX2YJno8Ypzqmw==[/tex]所围成的闭区域。

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)

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)

判断下列推证是否正确。 (∀x)(A(x)→B(x))⇔(∀x)(￢A(x)∨B(x)) ⇔(∀x)￢( A(x)∧￢B(x) ) ⇔￢(∃x) ( A(x)∧￢B(x) ) ⇔￢( (∃x)A(x)∧(∃x)￢B(x) ) ⇔￢(∃x)A(x)∨￢(∃x)￢B(x) ⇔￢(∃x)A(x)∨(∀x)B(x) ⇔(∃x)A(x)→(∀x)B(x)