下面两条合成路线哪一条是合理的。 未知类型：{'options': ['[tex=5.0x1.357]ozFVRzvsQlhi0vpr5bTj46+eqk/9cGdh0IFYA+TFICMsAvFfGWC7eCsvDda8ez8C[/tex][tex=2.0x2.071]ggDg21R5XwyF4hAwj58bWHSmlr7WZ+kgS01Zis7pJx59FttAqukKVxi8yiUlyVLCZfedKQHLcnS4Q3KvH1sXjQ==[/tex][tex=19.214x2.714]ozFVRzvsQlhi0vpr5bTj46+eqk/9cGdh0IFYA+TFICNiM6FJPLDBp9njesA2jA8KGMegDhD6Ys9VYd5LkI9EYE4f9CRpJ/Uf42MqR4Xl/P+gF0csFLUPB8Oz42Rjb0lInsbRGpMWhDNZC+SfzIUthc8S39k8NFmsXzS2mEY682ZoyRnMvF0/4YgYV3tNYgQiYg33AHFuLfV9G47ZBj2P8xDSgoQeW5ZAV5BFs3JqH6J6pHDsA45kIyGZ1fvBsPjCysA9IKFkRQVlfIPFAGIrHg==[/tex]', '[tex=5.0x1.357]ozFVRzvsQlhi0vpr5bTj46+eqk/9cGdh0IFYA+TFICMsAvFfGWC7eCsvDda8ez8C[/tex][tex=2.429x2.071]ggDg21R5XwyF4hAwj58bWHSmlr7WZ+kgS01Zis7pJx7/gPum7rJ+Qa9SaRpIgD0j2NMwb9iq7pw4EPsexEOyLg==[/tex][tex=15.786x2.357]ozFVRzvsQlhi0vpr5bTj4y2hS4JAwmjtfoUflGkVNy80uQ1rgQo3d7Bfr4/PR1l5goELpnvDfPtiArmKbBQsZRiVUxxFrZwrTWyoyV28tUDtWOfbP6cGDizII8vIMZ8fkGJ6Du9uNb1wIFpEymBTQArioCaTDI8NB5Heg/E/+T/U7AnulvxB8x9lBlVQYXteggk4yv1WR4Ubhcj8CiAFCQ==[/tex]'], 'type': 102}

指出下述反应中可能存在的错误在哪一 步，只有一步是错误的[tex=8.214x1.214]28bKYtapPumlo55XXM90Ee9kmDw94bTe/3ObFz438j0DbIVC9xwYzx9ob8/khrmQ[/tex][tex=3.214x2.357]ggDg21R5XwyF4hAwj58bWHSmlr7WZ+kgS01Zis7pJx5AQYuqNWmFkYnvK6ZXwV774dn8TTm1dOlfFVBrLJH8qg==[/tex][tex=9.643x1.286]28bKYtapPumlo55XXM90ES14NQjmPNr6X3D0YWbznTu2yJ5oWa8W25WZ8s3nUSBy[/tex][tex=2.429x2.071]ggDg21R5XwyF4hAwj58bWHSmlr7WZ+kgS01Zis7pJx4so3KSVyf/h2Xl1h+NAeP0N3rIKtO32WpOZ15ZLzWZaA==[/tex][tex=12.286x1.214]28bKYtapPumlo55XXM90EcOAPUKF1L1tFGLb6f87VNYCjIZFKd2KRqY6JB2Ow7z4[/tex][tex=2.357x2.214]ggDg21R5XwyF4hAwj58bWHSmlr7WZ+kgS01Zis7pJx5zLjWZKbUrcgjbV7w5fKSmRRV+iHHTrPoZDedhh7eyIA==[/tex][tex=10.714x1.214]28bKYtapPumlo55XXM90EcOAPUKF1L1tFGLb6f87VNbGb1lYgBqZbwSjOLXbK+ix[/tex]错误在[u]      [/u]

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)

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

使用下述谓词：P(x): x是语言、Q(x): x是中间语言、R(x): x是世界通用的，及量词表示自然语句“没有语言是世界通用的话，就至少有一种中间语言存在”为（ ）。A.~($x)(P(x) Þ R(x)) Þ ($x) Q(x)B.~($x)(P(x)∧R(x)) ∧ ($x) Q(x) C.~($x)(P(x) Þ R(x)) ∧ ($x) Q(x) D.~($x)(P(x)∧R(x)) Þ ($x) Q(x) A: ~($x)(P(x) Þ R(x)) Þ ($x) Q(x) B: ~($x)(P(x)∧R(x)) ∧ ($x) Q(x) ~($x)(P(x) Þ R(x)) ∧ ($x) Q(x) D.~($x)(P(x)∧R(x)) Þ ($x) Q(x) C: ~($x)(P(x) Þ R(x)) ∧ ($x) Q(x) D: ~($x)(P(x)∧R(x)) Þ ($x) Q(x)