完成并配平下列反应方程式。[tex=12.286x1.286]vkYsO+ohFvXMMQbqFMRtUFKwkmLghkp66cwkbs7YvAKTUv2gNUwMVaJYZ8zMfMMJz8OE5ZytE54mdHfbSHq1Ww==[/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

用正交变换[tex=3.143x1.286]QVVOVp91gQhhEHguVLurog==[/tex]，将下列二次型化为标准形，并求正交矩阵Q：[tex=12.286x1.286]bD/A1mGMjERCq5YZ0ZWqyEOpva9iRyN07LkGhawVebBM3ivq0bK1S5aO6WN3Di9ZPCZjPUgDU2Qfkd/r3E692w==[/tex]

对一双链[tex=2.429x1.0]KitG8EYfF06RUhNbTvosJQ==[/tex]而言，若一条链中[tex=12.286x1.286]RuuRZKC4Ay6VsVUdrhhhxAQ+y2sZWUnQYVlEsaqoEeg=[/tex].则：在整个[tex=2.429x1.0]KitG8EYfF06RUhNbTvosJQ==[/tex]分子中[tex=10.714x1.286]wDlZMlk74Xx84POvJAidxikaDj0ErmEgCPZPzocza3A=[/tex]？

[tex=11.071x1.286]C0NfOJQicq2WC4byKFTr184uXKugEWhb6Po3V3yjrDvel7SE51LebhbQm3i18tv0[/tex] 未知类型：{'options': ['[tex=12.286x1.286]IzLd+x0evEAumNd/DyldDjhnYcVZACjETXy4kmgjp+wXf4VtwHHF1dOaCGEGFpsz[/tex]', '胸内心脏按压比胸外心脏按压更有效', '[tex=12.786x1.286]qFMxIiwK7/Gla5xCNZWFtIKd2CFKmEC4fdCc1j4KfzoKt6Fl8MMADuXB3cNj48hu[/tex]', '迅速开始人工呼吸', '[tex=16.786x1.286]TmpBxnvNpyLEeyNlEoBCn/7VhEqpa6cEyN7MG9oVj3Lx6g2lk3IQWxq/ckd2+GrJ11HOlfVXG/aoctB73W4pPw==[/tex]'], 'type': 102}

源极跟随器电路如图题 4.5.3 所示。 [tex=5.643x1.214]hCOWbCfD98BU7TXobQHxjP8Hftjtz2l8L3Pc9SKFjsQLko9kUKIusaI2znsh5/Nl[/tex]。电流源[tex=12.286x1.286]/dulpBo9Depzv3BRO+nYpRFGtuFLifUL0IqdqAovM/Jn7r/twOnI0RTiFL1wZRvEz8b6dm0HX8BNyARvZ1ZNKCR0sEX93BMnObt3UvHIV0bJtfTLolsLcPN59agdqChW[/tex], 场效应管参数为 [tex=12.643x1.5]JACacOLjnMCP4Jhwm+/AevMGQtqHea6ahSh3E1VAIvo3SxFEDdbWIMbk444Cu5Dsl4qS+7NV+3aOXHsIIEM9ZBe+zsYx+AYSOZUqSG3cn76OGN8aBJcSpscsYJq2zXqL[/tex]。 试求:小信号电压增益。[img=218x191]17d7b00c368a237.png[/img]

心肌缺血再灌注损伤导致舒缩功能降低 ，但除外 未知类型：{'options': ['[tex=9.357x1.286]WiT9/vSwl//y9X3haohYq0sY13k0JcJvUqrwtDF+nTkhTri5khKWa/X1ZaNXoLS3[/tex]', '[tex=12.286x1.286]LrKPyT4seYzsSgOvjNUAa6WhOBiZN34kxS9MWgE9eYJ1D2GMNNpyQuUowvX5sRSh[/tex]', '[tex=12.714x1.286]um3jmJi5KYc3wJiZcOKbzmAV6OmFRT2fCEyQ2oHvCoG7Hdeq0ecWAxYkGO+gJRQr[/tex]', '[tex=17.5x1.286]ReQDNJPpes/wmyUNgWkKFbnnc9tebcnHp4n+6TAMUfhgHhQh+bqjl44S686xGu2DChXbsVViKuafBAaVD5zDDw==[/tex]', '[tex=3.929x1.286]VUSbaBmzX/BpYhwsAGQc+haChO9oJHC8TSMgLHn7ITI=[/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)