[tex=27.643x1.286]TqTMAxYQ2OhZCHzEOkh9hyETtEr79QkdPHGDUwy9HzG4ToM3vMekTNOAwyN7eJOFWBy2tcbC75Br8Pd3Ts7PbkAJhO0NPsyeyWNyrSU+Em/S/VTl/xT1Xiy7IokccQQqM7Epjc6xUyQfIqrV6yWXxR6yxJjbKhzqT78X7/qtyl8=[/tex][tex=31.286x1.286]oAVS30Wy+yFnkDFAYK4YglaIlS+zuInK0oglmLXCBJr9ouPRy15aZvwDobkmkGFHjo2C+vEtdZF+nbu/ydDjGMLlNq8eiShPS5HH0thdLV9vDyx8ZnAq7c2kU4K+TPIG1lF3zSN0zkUko19M/H6oc5d91M2zE4l7P0U5rzp+lC8=[/tex][tex=28.286x1.286]RDNIMZcdOIKlwdhQT+8PWE28yUmKfZ/2WO/1crtmMvnMzIQYWMSBgyIJ3hoP29M3ksLD8RT+sKEVGQJuqhcvzH3LRaTxE9J91MpBlHxlchSha3XE2gzo5WZtVLgae5+yq9Dg3/xTCmJJIOhG9fCmuw==[/tex]

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2022-07-24 问题

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2022-05-29 问题

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

2022-06-26 问题

[tex=37.286x1.286]QCXE/kgvS7KOAad05bhk8gd33xy5DNoi8hU7G8m/fdyc395HyDz2DdfOqyqZnPA3Obg+C8yEXfljSCyraWQqBxqrek1o5EWRVr632yVgr53kw8a5Dt6RhimrEBTqXmdeSyc46h5dJeS39Ts56X92aJTj+oFJ63yXbL6r6EvseH2Lkh36x/M9Ad7d5YLgL2DU[/tex][tex=16.071x1.286]NYZFpIgLd0ngwVPi6t9qbXLzEoHUPt7SJWgDw/Wyf1D5dexL5YRNq5pEdwAF+XmpGEF77Syir4vDRhlRxkmN/Q==[/tex][br][/br][img=420x267]17a79232f1fe581.png[/img][br][/br][tex=27.643x1.286]BAkx982iwXW3rH6nBvdOEZwhYzLNlhz9qJKEla6smIR6yZLWP3oTKk6ueAdjWEZbOCVwtSB3crgQaSDdTCyUyAEwu2CQ1JkPgH2kLL5ClHFlYaXUGOG29JCvi4TJeYJc0xPGIDTzfFqFUB6dMiW7pQ==[/tex]

[tex=37.286x1.286]QCXE/kgvS7KOAad05bhk8gd33xy5DNoi8hU7G8m/fdyc395HyDz2DdfOqyqZnPA3Obg+C8yEXfljSCyraWQqBxqrek1o5EWRVr632yVgr53kw8a5Dt6RhimrEBTqXmdeSyc46h5dJeS39Ts56X92aJTj+oFJ63yXbL6r6EvseH2Lkh36x/M9Ad7d5YLgL2DU[/tex][tex=16.071x1.286]NYZFpIgLd0ngwVPi6t9qbXLzEoHUPt7SJWgDw/Wyf1D5dexL5YRNq5pEdwAF+XmpGEF77Syir4vDRhlRxkmN/Q==[/tex][br][/br][img=420x267]17a79232f1fe581.png[/img][br][/br][tex=27.643x1.286]BAkx982iwXW3rH6nBvdOEZwhYzLNlhz9qJKEla6smIR6yZLWP3oTKk6ueAdjWEZbOCVwtSB3crgQaSDdTCyUyAEwu2CQ1JkPgH2kLL5ClHFlYaXUGOG29JCvi4TJeYJc0xPGIDTzfFqFUB6dMiW7pQ==[/tex]

2022-06-30 问题

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}

2021-04-14 问题

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)

2021-04-14 问题

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)

2022-06-29 问题

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)

2022-06-25 问题

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)

2022-06-12 问题

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: ($x)(P(x)∧Q(x)) Þ ($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)

2022-06-26 问题

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))

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))

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