对于反应[tex=6.214x1.143]kl5eIlOChX4c9coAdMdU2eKU4QQQpnmk07L/YNsXxmM=[/tex],下列所示的速率表达式正确的是 未知类型：{'options': ['[tex=6.786x2.429]vsoFP61R4qm9sUqgjcSKokhQUIA5U7ihTHGQkyMpQrfRGo5/x/BAS7DQ+RCdPl+2JhdfqtzeAVSJElAQY671er4sO5Yp4KxeAkFZlN1EiLA=[/tex]', '[tex=6.786x2.429]XLIECryJNru1f6SFusLfvVx4iJYHkRg38mt9xdrkg7sHodiqQ6PVLiF3ZOuKL5mO9BUSyZ040aK+/2DghsVJjeVjFANh72UiTUNqmm2yIR4=[/tex]', '[tex=6.786x2.429]XLIECryJNru1f6SFusLfvVx4iJYHkRg38mt9xdrkg7tPltigP+wI/6+GEZ5D2Q5iHQf+7pGIPmRZy+/6lYlbUb73kktgae280JlXEOm7UWk=[/tex]', '[tex=5.929x2.429]WHvV0MkBTpSPnPZPagAYIZJpL05vNSSjb9uFi0JzT5kOH5BWrVGNZPJnBTUo7yLEtf7Aax4/NNGVhIIoPYjwYg==[/tex]'], 'type': 102}

用分部积分计算定积分[tex=6.786x2.429]DIk5iNj4ubJeXVHIuFga0OuekDaxkDQ+qQQZtxFGIrcuQEHNoaUbDyRf/+LxTQL9[/tex]。

概略绘制下列传递函数的幅相特性曲线.[tex=6.786x2.429]K/no4e1C3aEirAdlJUP45kVt4bH2FFoXsq+dMCP1RLHhfj1UAXrh4fDyehivv9Cf[/tex]

试绘制下列传递函数的幅相曲线。[br][/br][tex=6.786x2.429]NdLKqvg7yC4Y57EisYHuBMB70DW6ATmpaSiPrUF89Os=[/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}

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)

以下谓词公式中，( )不是逻辑有效式。 A: ($x)(P(x)∧Q(x)) Þ ($x) P(x)∧($x) Q(x) B: ("x)(P(x)∧Q(x)) Þ ("x) P(x)∧("x) Q(x) C: ($x)(P(x)∧Q(x)) Û ($x) P(x)∧($x) Q(x) D: ("x)(P(x)∧Q(x)) Û ("x) P(x)∧("x) Q(x)