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[tex=38.571x1.286]EfMsjUPjhrTA1r4bmiaqhZvOPqAes+OvRbj5/DVhdxYf3fPMbyKUWVpzsAI/Sj7Rm1Qloy2BY+KH8IDYPcSKTQPeGawW7kLpUWE8gA1d5lYDw9G5fBTvYR+QlDJK2rSOlv16ql+Qql2rNSbRQ3GECGbfZUC+rOIxpKJ3KjrjbqA=[/tex][tex=29.643x1.286]4bYO9vzKEAq7olyEgKFo+e67nS4PsEO1LoHUenQKltelt+oybqiIvoFs6g32xP28yfSD7mA2lC5ltwSkLDj2efUgIVWuKs4/m5dcE2pPURKwr0/+pHt7duUZjdDrkgTjVJw9MGD4pFTj6y7Xiv2zfw==[/tex][tex=27.571x1.286]lbrx7yz+6uxmT5aDlS+OC5YIsHcrxPk1iVSC55Itw5rxI+83HUkpg9FgJk+RdX7lcsniIFEhXdLaEx540hXTewPwVsCKQAjdgRDE5Dz89qH7LJM5ROaRxkI/7bqS32cE[/tex]

[tex=38.571x1.286]EfMsjUPjhrTA1r4bmiaqhZvOPqAes+OvRbj5/DVhdxYf3fPMbyKUWVpzsAI/Sj7Rm1Qloy2BY+KH8IDYPcSKTQPeGawW7kLpUWE8gA1d5lYDw9G5fBTvYR+QlDJK2rSOlv16ql+Qql2rNSbRQ3GECGbfZUC+rOIxpKJ3KjrjbqA=[/tex][tex=29.643x1.286]4bYO9vzKEAq7olyEgKFo+e67nS4PsEO1LoHUenQKltelt+oybqiIvoFs6g32xP28yfSD7mA2lC5ltwSkLDj2efUgIVWuKs4/m5dcE2pPURKwr0/+pHt7duUZjdDrkgTjVJw9MGD4pFTj6y7Xiv2zfw==[/tex][tex=27.571x1.286]lbrx7yz+6uxmT5aDlS+OC5YIsHcrxPk1iVSC55Itw5rxI+83HUkpg9FgJk+RdX7lcsniIFEhXdLaEx540hXTewPwVsCKQAjdgRDE5Dz89qH7LJM5ROaRxkI/7bqS32cE[/tex]

用孔径分别为 [tex=23.786x1.286]z4GiupUzfPDgj0aT6RVfrH3TICFHVFwpO8SHOLcC3uRbCRs+rupaj1LEDC3mnRyLcs7a6OAdHNdZEMHqyuoNgR4jJsArBQ91NA0hXKGgxkM=[/tex][tex=29.643x1.286]caRiD4Yh4YxvYRoZ5zKQneBpnDIjrUM99wDqvaKelZlmE+Mfag5D+EoAwZQ6K97fFcgmhPFCvxmkdmi/iAVI+SZdR4OIi8PfEj3H30TqW6mvf9TBLE9sCyOmsbd8QeP4FFpFhcRyq/KcB1GmG1Cbag==[/tex][tex=13.786x1.286]KBPkuRjVz4B7bKXEVAOKpnOC3ihxQ15HM0u90Ukh7GlVueHeCIIUdm7rGcJvctdV[/tex]

用孔径分别为 [tex=23.786x1.286]z4GiupUzfPDgj0aT6RVfrH3TICFHVFwpO8SHOLcC3uRbCRs+rupaj1LEDC3mnRyLcs7a6OAdHNdZEMHqyuoNgR4jJsArBQ91NA0hXKGgxkM=[/tex][tex=29.643x1.286]caRiD4Yh4YxvYRoZ5zKQneBpnDIjrUM99wDqvaKelZlmE+Mfag5D+EoAwZQ6K97fFcgmhPFCvxmkdmi/iAVI+SZdR4OIi8PfEj3H30TqW6mvf9TBLE9sCyOmsbd8QeP4FFpFhcRyq/KcB1GmG1Cbag==[/tex][tex=13.786x1.286]KBPkuRjVz4B7bKXEVAOKpnOC3ihxQ15HM0u90Ukh7GlVueHeCIIUdm7rGcJvctdV[/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)