[tex=30.786x1.286]xi9SrAoqmKNq1J/czJT9DRHu7/l61vqZRAXE/JY4p4CY/QDEn6ePw2Sh3jp4bYDznkxZxYPhb5XBK+ZNArroR/hRSdEk9DHwICsJ6qOnYbPO+48PwTNE+ByaomQq92gAYGunrdAP7dyAwqMbqf3GZHBzp5TPU6d80kdINGMmso/i1aJX/i6BG0nxop32G39T[/tex][img=577x219]179a658187ac3df.png[/img]
[tex=30.786x1.286]xi9SrAoqmKNq1J/czJT9DRHu7/l61vqZRAXE/JY4p4CY/QDEn6ePw2Sh3jp4bYDznkxZxYPhb5XBK+ZNArroR/hRSdEk9DHwICsJ6qOnYbPO+48PwTNE+ByaomQq92gAYGunrdAP7dyAwqMbqf3GZHBzp5TPU6d80kdINGMmso/i1aJX/i6BG0nxop32G39T[/tex][img=577x219]179a658187ac3df.png[/img]
[tex=30.786x1.286]0YSz1XAyQeFMcWCEam+DmspNs8LyeePYlxiB/9oi1WEuCZ+SbGXJvzs5sWajOv7TLYRT1iq18LcaAarXJMzRuZRkYAu5TzSpkXRjHJ/PqaSmpWjB1GGBSUYK49IgGWHrp6NnheJteNjeTS+0IAQAmF8ifNfkpI9B8eNnYrXwGwQ=[/tex][tex=32.143x1.286]kYh3IBrGmMsbEmhLHAwU8rxF8kX25bZnmjsdcox8Vb8+OOvIXUthZjBAahUlZHkeOKRhk1b5iGilj200k+/ii7zgl7cdplICgmuNMbr8cEdylbFiZAKjxZoXS/mu3a3wrGUrY0jAgTBPbOEjeK2fow==[/tex][tex=10.643x1.286]cs0liiF77vflojN5qVgI5k8ifMHgSx0HO6ehJiKgwOxtmgXJnX5MUoR4OL7W3I7X[/tex]
[tex=30.786x1.286]0YSz1XAyQeFMcWCEam+DmspNs8LyeePYlxiB/9oi1WEuCZ+SbGXJvzs5sWajOv7TLYRT1iq18LcaAarXJMzRuZRkYAu5TzSpkXRjHJ/PqaSmpWjB1GGBSUYK49IgGWHrp6NnheJteNjeTS+0IAQAmF8ifNfkpI9B8eNnYrXwGwQ=[/tex][tex=32.143x1.286]kYh3IBrGmMsbEmhLHAwU8rxF8kX25bZnmjsdcox8Vb8+OOvIXUthZjBAahUlZHkeOKRhk1b5iGilj200k+/ii7zgl7cdplICgmuNMbr8cEdylbFiZAKjxZoXS/mu3a3wrGUrY0jAgTBPbOEjeK2fow==[/tex][tex=10.643x1.286]cs0liiF77vflojN5qVgI5k8ifMHgSx0HO6ehJiKgwOxtmgXJnX5MUoR4OL7W3I7X[/tex]
[tex=24.357x2.0]urHCeD584ukeEx4HZrqts5a+MZchF7ey6pIusvyOWugL2P1caOg15d0XdjjHhfN9+ArKFeZb2p2zdNEtQftmOGGKiLd3duZF/fZ4Zn2rhNyooq6koypeNWQT50mX5tht09blZJebq4Ok0mL0iKlDsg==[/tex][tex=30.786x1.286]28GflAU9DU3c7jCWx26FfajPRjgBstX5xxN5WNAGh1bejLrD1smlmkaNvar4rk5TdB3dRpEB1CnntkxVRx4ty736BunOFf2FyuTCoz5XwAOLLhQFx956/bou14pm986e0ubm0TClrczWyOzRfilXYw==[/tex][tex=27.429x1.286]eeuo0LfuamRBzdJFPrvdYK1E4BcmxqOfBkSJa/6bDRFbCOPc/YNDCiMbW91OIvHf77aHgUJmJ5siRDlZknNarMHeJrhQSfDuz3Bs+TJBWqdSikfi929rJCsXy1+zo8o0[/tex]
[tex=24.357x2.0]urHCeD584ukeEx4HZrqts5a+MZchF7ey6pIusvyOWugL2P1caOg15d0XdjjHhfN9+ArKFeZb2p2zdNEtQftmOGGKiLd3duZF/fZ4Zn2rhNyooq6koypeNWQT50mX5tht09blZJebq4Ok0mL0iKlDsg==[/tex][tex=30.786x1.286]28GflAU9DU3c7jCWx26FfajPRjgBstX5xxN5WNAGh1bejLrD1smlmkaNvar4rk5TdB3dRpEB1CnntkxVRx4ty736BunOFf2FyuTCoz5XwAOLLhQFx956/bou14pm986e0ubm0TClrczWyOzRfilXYw==[/tex][tex=27.429x1.286]eeuo0LfuamRBzdJFPrvdYK1E4BcmxqOfBkSJa/6bDRFbCOPc/YNDCiMbW91OIvHf77aHgUJmJ5siRDlZknNarMHeJrhQSfDuz3Bs+TJBWqdSikfi929rJCsXy1+zo8o0[/tex]
[tex=24.357x2.0]urHCeD584ukeEx4HZrqts5a+MZchF7ey6pIusvyOWugL2P1caOg15d0XdjjHhfN9+ArKFeZb2p2zdNEtQftmOGGKiLd3duZF/fZ4Zn2rhNyooq6koypeNWQT50mX5tht09blZJebq4Ok0mL0iKlDsg==[/tex][tex=30.786x1.286]28GflAU9DU3c7jCWx26FfajPRjgBstX5xxN5WNAGh1bejLrD1smlmkaNvar4rk5TdB3dRpEB1CnntkxVRx4ty736BunOFf2FyuTCoz5XwAOLLhQFx956/bou14pm986e0ubm0TClrczWyOzRfilXYw==[/tex][tex=27.429x1.286]eeuo0LfuamRBzdJFPrvdYK1E4BcmxqOfBkSJa/6bDRFbCOPc/YNDCiMbW91OIvHf77aHgUJmJ5siRDlZknNarMHeJrhQSfDuz3Bs+TJBWqdSikfi929rJCsXy1+zo8o0[/tex]
[tex=24.357x2.0]urHCeD584ukeEx4HZrqts5a+MZchF7ey6pIusvyOWugL2P1caOg15d0XdjjHhfN9+ArKFeZb2p2zdNEtQftmOGGKiLd3duZF/fZ4Zn2rhNyooq6koypeNWQT50mX5tht09blZJebq4Ok0mL0iKlDsg==[/tex][tex=30.786x1.286]28GflAU9DU3c7jCWx26FfajPRjgBstX5xxN5WNAGh1bejLrD1smlmkaNvar4rk5TdB3dRpEB1CnntkxVRx4ty736BunOFf2FyuTCoz5XwAOLLhQFx956/bou14pm986e0ubm0TClrczWyOzRfilXYw==[/tex][tex=27.429x1.286]eeuo0LfuamRBzdJFPrvdYK1E4BcmxqOfBkSJa/6bDRFbCOPc/YNDCiMbW91OIvHf77aHgUJmJ5siRDlZknNarMHeJrhQSfDuz3Bs+TJBWqdSikfi929rJCsXy1+zo8o0[/tex]
下列选项为某变速器一、二、三、四挡的传动比，则三挡的传动比为（）。 A: 0.969 B: 1.286 C: 1.944 D: 3.455
下列选项为某变速器一、二、三、四挡的传动比，则三挡的传动比为（）。 A: 0.969 B: 1.286 C: 1.944 D: 3.455
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)
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)
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)