钻石的密度、折射率、色散率分别是（） A: 3.52；2.417；0.044 B: 3.25；0.044；2.417 C: 3.52；2.147；0.044 D: 3.52；2.714；0.044

下列关于副反应系数的定义正确的是 未知类型：{'options': ['[tex=10.786x2.786]nzhYuLo6BE2xhvAMpytX4apJ7oCzbchikYARrJQfNw7Av73leUY36mv44jHw2jeR4DrEnwX9DBQzBVjVXwJqnnMTEZn+G2gkbQj0xNp4Hb8Lxxkte2iZBUrZvDVEo5N/y0xHmOG4+LNdK6Yo0wcEdL8JubRjE/aQ19Rcaw9+XYHODa3zR6h38A64unc3Z8jpfeHdjyBg7ZzVwz179WaI3YxmrlVIpK4N45FhAYN+d2U=[/tex]', '[tex=10.929x2.714]AXfbFLoD6dX/q87JnBx/VHk2zOT2IhIw2RkiYmHzlIMl6O1h2DqZUw+nD9rbFiYvnoPCSLmyfVQma/taOs33qE/lYA0sVgmOVpkq3bOp1djf5cNxhoBe4IFKavKLiNs5ZFvyn88ktc2gUmaKBlJCPg==[/tex]', '[tex=9.786x2.786]nzhYuLo6BE2xhvAMpytX4eKWzbynNi1NKnDV9jhqCDuRmEOJug08MCLIWVVzLyl+QKPOKE5Bw78LetbMZi5n2z+Iq7fn6u/EVROfuAvFNk8wP10qX/A9zK6Es80YwDNWKM/gT8AirJ7G6Zsr4KTI2jtsXJS8mEIiw9i2BZYgiHBTeLir1TihGMKVIS+uhp/sAlf+jUa6zi6f0+gbxyROcN19nzytO3EiUMDkRo6mWQU=[/tex]', '[tex=9.786x2.786]nzhYuLo6BE2xhvAMpytX4eKWzbynNi1NKnDV9jhqCDsfRMjnnvArRRaObMYKIy6N1VoEmHabkoZB7jbx7ELFFsDOZ8wieH+3sa3evw5omOz2WBrvixKYL5N/NWN2efTueFJLnTC4wr5OgE2fVlrMm0N/T7zTC7frM1SB5tnRDIi59maya51oG5Y7FsHzoJrV1Xm9TFv+wCrSENHwSOncxtM3Cw8HHt6iet7VVyg2Mbg=[/tex]'], 'type': 102}

下列关于副反应系数的定义正确的是 未知类型：{'options': ['[tex=10.786x2.786]nzhYuLo6BE2xhvAMpytX4apJ7oCzbchikYARrJQfNw7Av73leUY36mv44jHw2jeR4DrEnwX9DBQzBVjVXwJqnnMTEZn+G2gkbQj0xNp4Hb8Lxxkte2iZBUrZvDVEo5N/y0xHmOG4+LNdK6Yo0wcEdL8JubRjE/aQ19Rcaw9+XYHODa3zR6h38A64unc3Z8jpfeHdjyBg7ZzVwz179WaI3YxmrlVIpK4N45FhAYN+d2U=[/tex]', '[tex=10.929x2.714]AXfbFLoD6dX/q87JnBx/VHk2zOT2IhIw2RkiYmHzlIMl6O1h2DqZUw+nD9rbFiYvnoPCSLmyfVQma/taOs33qE/lYA0sVgmOVpkq3bOp1djf5cNxhoBe4IFKavKLiNs5ZFvyn88ktc2gUmaKBlJCPg==[/tex]', '[tex=9.786x2.786]nzhYuLo6BE2xhvAMpytX4eKWzbynNi1NKnDV9jhqCDuRmEOJug08MCLIWVVzLyl+QKPOKE5Bw78LetbMZi5n2z+Iq7fn6u/EVROfuAvFNk8wP10qX/A9zK6Es80YwDNWKM/gT8AirJ7G6Zsr4KTI2jtsXJS8mEIiw9i2BZYgiHBTeLir1TihGMKVIS+uhp/sAlf+jUa6zi6f0+gbxyROcN19nzytO3EiUMDkRo6mWQU=[/tex]', '[tex=9.786x2.786]nzhYuLo6BE2xhvAMpytX4eKWzbynNi1NKnDV9jhqCDsfRMjnnvArRRaObMYKIy6N1VoEmHabkoZB7jbx7ELFFsDOZ8wieH+3sa3evw5omOz2WBrvixKYL5N/NWN2efTueFJLnTC4wr5OgE2fVlrMm0N/T7zTC7frM1SB5tnRDIi59maya51oG5Y7FsHzoJrV1Xm9TFv+wCrSENHwSOncxtM3Cw8HHt6iet7VVyg2Mbg=[/tex]'], 'type': 102}

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))