[tex=23.143x1.286]ihhsOst/DSPt2SQNk1o1GSc+mSU/FPpzLYySHKlxzZ2AFYNt11VQWy0NhyIpkNPT6kBWxhd8OS8BRJQ4S5SQteZo0SnqIz3WuGHVIwzxRIA=[/tex]

[tex=3.0x1.286]7QtGvbf01ApByqqeaz+W5w==[/tex][tex=7.0x1.5]kpo/b8/icq1DvzshyUnNTaOV2/wy0KMWnoxunWLSoUqJS1KPNBbECferfzjlTNNP[/tex][tex=23.143x1.286]wiPDOO/rpRT9K6etrpsf5++CrjajlDUmLQVQjDAR37tf80mYZzjN+x4l5b4QeAaggSx8/N83TrKADkWMi+vaUkRqrs+N1G+FB/Di67TjZJY=[/tex]

[tex=23.143x1.286]5LrLNLidlvBHn3YyZUj77+GGMjANUrWqcthmkPWXk7N3264tIx5Mtd8GaYhmPMcfsj5ZWpUFKRKU8Ob6HvBxyDYmdyUEogzrshGBPdxEZ6lifA0wy3QbdkrWt/QhvHeoZKkRDOwtxcGQ4RQ/HBZOpQ==[/tex][tex=28.0x1.357]NXEwYFc/3f5h/xFumRatTS/apoPiIWB2oJ2oRxtIsbPYexKrpubZrJaFV+nCJmnI5OzQ6FbXPh4LH7436ZVwoYK6O8EL7FcwvvmSxQnQIgT9NqYyOsBuzVQWamyH8Eu1w+TbZGvySv+nQc1YBzTmLnSWM1taoJBN2Q4x+mmkHFU=[/tex][tex=16.929x1.357]TFoKkmG9T5fcJZc2ico7qU87wBUd3WKW15meY89MoiYJs91k3wIWCBHoJBw5AGTPTSFi9pLIUyIuARTIsUXcljvYNUbJoXdEWrw5H5NJ16Nl/cyEP/Y1qkCH0nr7pFo8[/tex]

[tex=23.143x1.286]5LrLNLidlvBHn3YyZUj77+GGMjANUrWqcthmkPWXk7N3264tIx5Mtd8GaYhmPMcfsj5ZWpUFKRKU8Ob6HvBxyDYmdyUEogzrshGBPdxEZ6lifA0wy3QbdkrWt/QhvHeoZKkRDOwtxcGQ4RQ/HBZOpQ==[/tex][tex=28.0x1.357]NXEwYFc/3f5h/xFumRatTS/apoPiIWB2oJ2oRxtIsbPYexKrpubZrJaFV+nCJmnI5OzQ6FbXPh4LH7436ZVwoYK6O8EL7FcwvvmSxQnQIgT9NqYyOsBuzVQWamyH8Eu1w+TbZGvySv+nQc1YBzTmLnSWM1taoJBN2Q4x+mmkHFU=[/tex][tex=16.929x1.357]TFoKkmG9T5fcJZc2ico7qU87wBUd3WKW15meY89MoiYJs91k3wIWCBHoJBw5AGTPTSFi9pLIUyIuARTIsUXcljvYNUbJoXdEWrw5H5NJ16Nl/cyEP/Y1qkCH0nr7pFo8[/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

证明:如果随机变量[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex]与[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]独立,则[tex=23.143x1.286]yHxVvI6MGHt4oq+xh/n7TfXoMzAyfnr+IZciCQaLpjoSCXQg2iQZ5hA5I7dJavATECrNOcA1p/8EUcjK3I5pHA==[/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)