[tex=28.143x1.286]hQxoCGNJBLvX6su3cXrUof2Lpjo4+AVLc8B3/5GRje8CWvSCa70tj54koKgw+QoulYjWusadmjR4nED7R8fJwWatUw2wibKHkMljmR93V7KkoGUa0zF5aYbELVFWzDiI[/tex][tex=20.571x1.286]qQkak7bhd/HLg1Pl0e9jZDqiodK03l1GmL5edZH+ySOi7+o+7tdQUrGcI9LdOJ4lAv/tLuS3OKTNw0NYtBgZloBUfOhWeJEn2hzBNgJyKvk=[/tex]

[tex=29.714x1.286]7aPvKHsHir+5qujAHp3TKveDI5WZVpWuo0gJ/dh9nwe9cg3kXHqru9UHXXwech79UATJLmW9zJP/ITVzV67x4hRBgTkacW84BoYW/0cM5mT4ZfHJdtU8JcOO1c+huYuI[/tex][tex=20.571x1.286]UxEiEbyu0UoefgNJvhtfX350buhJZYsPZhDvllOeb5710GoLIq6PBNP77ZHrxbNM25r66sRoQduMxfpdQvq1GJE9IhY/gI0b1Ks2drNKcCw=[/tex][tex=23.071x1.286]UYYVviOaIUaQJaiVe36JHqUmQwCBSGYVcU6uUrnz+BD1CDIwZQRchH3tYF6AacnU5yjlQGTBWUBtSdZj8isONhwFysGqEnOyaF+9Yy7SxcJmyd55jDx8w1q3DZRypFxv[/tex]

将下列函数化为最简与-或形式,方法不限:[tex=20.571x1.286]2IO4feBvKJMBINeuigYjfRTb+Fghv15yLXjGVKMQKV/LlCLVlOPnJ8bZiO9niWvyqXmW2oiwNR/FOT01ofF+GLXSDWsSF8mF5RnjDufrzjA=[/tex]

已知离散系统的闭环特征方程为[tex=20.571x1.286]W7CxwsJyRQ/DsRbueddEuRFCsCvDxuZZCeZ1dsWwbCbzer3WweEZaKottB/+NGTVUgqQ0wn6qz4IInjKKcTO0Q==[/tex]试判断系统的稳定性。

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=17.714x1.286]qwvaTXw6ZcgFdc2t3s8iqN6Jx7Zq1SIGNj42QSPBhha3K5tb9QpHOM6BHLnBIPazSKXTU+itrVHT86+u/2hoCg==[/tex] 未知类型：{'options': ['由前列腺腺泡和导管上皮细胞分泌\xa0', '具有前列腺组织特异性', '是前列腺癌的特异肿瘤标记物', '[tex=16.643x1.286]Lvpry4J2d+9SwDiKKQ9lIsETRlHwD0zSkDbKNb6DmVqOhkJnvPBuejFV0ZOy/A/h0b+TkJCX+QQrUUa6lqAgJw==[/tex]', '[tex=20.571x1.286]On6aaj7gNpy8KUUKgV9XEer95pXTencVohiGIum3chcHUXTCLoqit5B411cRPCzCR8tGxCrj4oLCf3YV83jm7oGbXVVXAKG7ML3TtbGJ3cM=[/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)

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)