[tex=18.214x1.286]CgCwftM5tPVvjSC+qsnexIETBXeiSxnP0PBpLgKZKEKwAeIcGv0+ErakXhCpEykqi5icBoxonMzzqgRcp3fRYA==[/tex]

[tex=18.214x1.286]4rzlbZZU8OpmwgbyPbBrcel2vZEgZGlCJMLV3swINimOm3nar7k5sZfLn21m/8QEk5HHHPmeHwCfknLzmTRLRA==[/tex]

已知:[tex=27.571x1.286]05bnQOcMdB+HJ3B52F9MMCIIV9qzS4g3j5Wr1oR7KrZ7AF5px5EnbgRTKIkt+PpEG0+qvaTBPxiJ8kqWXk43+RdpCEJ5tecoQZbAucA25Drq3ZKZQXGkBUUhhPi0tLeasb1TUHZfWQQ4nKL+iqq+dQ==[/tex][tex=28.5x1.286]ylzs6Me8ufxm2XHRycBmifJXQFbW2WXox9jll4BCvIDX/RpjL/zuucIu99QB7LbjKTKJ/ClVrclu+xJMUxv7qzBcK81dwmaR5amEITezCxa98e3an8MZ870epF2iRC8FO4Kpk1t99sLqBdeiy5yxSA==[/tex]则[tex=18.214x1.286]0iMH3x41w+Bf8nIs+LGc9SHC/2mwXuIZe+xJbUYSvf3hztOeUSwo8lnFq5Qr54lUUfquwykTxza3sk+QqqFQC8+odaDcaRk4ZCwEbpB62gGte3PlVnwrsO10g1w7bsOU[/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

给出下列每个正整数有序对的集合的递归定义。用结构归纳法证明所找到的递归定义是正确的。[tex=18.214x1.286]5FldelG4B6Wcz09/7MGc/18XV02KvYmmGsQqHDvuSXZpD3ziBFjfc4o8db7DLOh864PaBd1NgiouMCP2Dp+AET7tfxtANRuOsV7fv6yAlIM6R8D2WMDWYKSBxSWZMW2X[/tex]

[tex=18.214x1.286]ZzCPX/2X47Yh/iU+p4liiYe8XmKT9MKiH7BKjkuFkLnPfRlwAKiutXUC6+8A+Mh0A8yp7JTLtFFipCChT79Mq/2f7EdHevpJrUjabDO4FI8=[/tex] 未知类型：{'options': ['[tex=14.0x1.286]0rmyd+WpQV3iUaMG3of3WQ30eu6E7ggjRNM0Z3ZHGqXC8LUMw033X3lEcjwUEFUs[/tex]', '[tex=14.929x1.286]TvEzeL6fOwlWKPr0WmlMglXPlm+g8RSrKciPWMhAJ3/H14h6gWtuu6znqAXZcxGM3qd4AgwDajE5A+0xnXVDFw==[/tex]', '[tex=7.143x1.286]HUHVro8BXHDFtG3r36YzBMbfksFES1oCS6CUtf7Fwl8=[/tex]', '[tex=16.857x1.286]lKEvulvUOUnDW9A0ko3rnSa6oX49YArVFrUMDcuX6aJuSeXlarrGDPUZFjNrkMjiOc0tjQofVX/EOZmRMguoFA==[/tex]'], 'type': 102}

[tex=15.0x1.286]yvRcWaoUr4J9O/xdhox1SQuHxeybsSeRHYC5wVDJgDjUSHXQPV8HtbFL0kuBqtWDXKSs4wnK3+FK1cHrtqMm7A==[/tex] 未知类型：{'options': ['[tex=13.143x1.286]uK9FRNUDG8gt6xmb0ymmwZyU+5wwWJY4XnVcAwuKawTp+X9l5eGekcBZfCthoVck[/tex]', '[tex=17.429x1.286]b667zMfpalkRSs1RHKwDXFNI0BHJneRY8mIXMGUO4mjtKzNR5Vml/qhge0faqNkLfEq97WFznL6vt6+BfrMnIg==[/tex]', '[tex=13.571x1.286]oOfa/sXvpvwdjz6jepy19KLBzMjbVTrKWEzL5sfWnqdu3n/qB3sWhClPTJDCO/f1[/tex]', '[tex=12.571x1.286]YjxvBhVg5PDcZs74Bu2YMkyl4rIrAkb6z/3VAFdx0wbseh9nvfUniswhp92BDJDj[/tex]', '[tex=18.214x1.286]Pu9Nb+udbUPRKx2/Z8HeYjXeSVBNp+XDR2veiRRuWTiUrQFOzrdo5nQQCnrr9xutY7+EGljdZ1mEJ82uTfSfjQ==[/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)