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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

[tex=16.571x1.286]VoKfr1IIzGJmh8L2l120JoNLa79ktsFnoH435dPAi3u+DdWrYEyaWGBlc7WH+rRVNwrNQaZhwrveyjmTlJFQ/A==[/tex][img=345x154]179b08bfef292df.png[/img] 未知类型：{'options': ['[tex=2.286x1.286]LXjpt+SaCUG/mDjBt4XKTw==[/tex]', '[tex=1.571x1.286]aQLD1OHoaH5ij1JSc5yy1Q==[/tex]', '[tex=2.286x1.286]35cKc8RONzqcXxQY1ddlmw==[/tex]', '[tex=1.571x1.286]kifJacHbV6a1tENhJaAgpw==[/tex]'], 'type': 102}

在下列的氧化还原系统中，氧化还原电位最高的是 未知类型：{'options': ['[tex=5.786x1.357]VtbTkEB7elENpp87VoIbHQ==[/tex]', '[tex=16.571x1.286]kVtXSzDfutncN0XmhWwW7PwQyLiH4gZlgC8wbn80CS9xsLNYkLhh2JE+0670SaTvUEGARcsrzFbCQkpFIe9uJ/RneNowfQsUn7+0UBmTIOM=[/tex]', '延胡索酸/琥珀酸', '氧化型泛醌/还原型泛醌'], 'type': 102}

[tex=16.571x1.286]tzujbhyG601y0SDXpqLeq01FaA+avy+EnNNUpSzmsm1ia16pHOS7v6BM5HSINR7K+KKPE1ZfVR8YVbeMrtfpEg==[/tex] 未知类型：{'options': ['一般不伤及基底细胞层', '上皮的再生有赖于残存的生发层及皮肤附件', '[tex=14.857x1.286]stT9dTjwxiBwj01fvtJ0K+Y9P4Oqn1lrg4yomAxhfLYgnBdastu/tQC3Af5BYA1/34+sPXhqqVfDPF1ZNsZopw==[/tex]', '\xa0正常愈合后一般不留瘢痕', '创面常需手术植皮才能愈合'], '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)