[tex=26.071x1.286]LTtqDH2vEzeo4Ywm8ePDL/wK3mlPpALgD46sMS75DfwC67t6/QmfguTKbKGKKtrg0j5E/JZce14oYL/4BIAFL0OuC5QPiI7l9nmsaha7mj3rf+abk+r3NsCI06Yxaode[/tex][tex=32.571x1.286]x1pZpDDdhjmpByDwOnZG/zAXViysSkmptYy+8j1HfXgwkkwcWEAEd2sa+bKrPG0NZUXJrX9omVOi2E/HcljHCTlcwqgy+uP8QnimsG6n28NY7n4wQ5TPpnxbYjPbr7e1t45NMGNR8kmznQu9A3i7ypR6yY/a9qn+Ch/pLh1LqU0=[/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

[tex=29.857x1.286]CYxwPF7BsEvspkxkg/4trUi2D9pl7yxfhxOgivRQvhjhQaqYABaBYKnFkGpu4psS6zVAkHQ+pn/gB5unFJt7nSNyRyJqTY3VR2bAtjJ5Xoq8RRq4YeVEB34pJ1mMSDmyV+GIqtzgZs2ZiwGpJ4tFjA==[/tex][tex=32.571x1.286]NjqvWAVrON7tfrtdkkHcO7S0jgW3bzz1l3uyRqKi4PkMEr7Wm2vPCotjmKKSxbFtzf9ZzKScyxFWLhDJ6L1kik1szk5wUVtkPJR9j6eSIP/VOHE3OMHUA7NcUnAjMngP6bXH5aUDCRbMtAV7ZpPg8w==[/tex][tex=38.071x1.286]ohlEq94TktBDlJLdp9BLEscgGjlez3JKU5JU5w/LR+3ycuaUuD5iIUpIdnKPs4ntTdpMmhW1r60GPc/b/jdN4YNHVzjHZO+8AjYH07ymINaSDU7xkDvO/pf9FVxFj8cuH+9z5Q3u/MyOpwTb9URKhVKUSn9z0LH43MGNfN0dJxIiGOYF0a9F7bLutg13bB+U[/tex][tex=23.714x1.286]P8LsX+lbqn1ert7JmnpzVFDSVhzI1Z/E4StQAUNJbf12aWtXsaTnzsPsQsaJxkuR2F3HcES73BjDv/9RDqUGyWWIoaCzzFTOAr5QHpjyz4Yy/guyb6zW8RovA/+Rufjs[/tex]

[tex=29.857x1.286]CYxwPF7BsEvspkxkg/4trUi2D9pl7yxfhxOgivRQvhjhQaqYABaBYKnFkGpu4psS6zVAkHQ+pn/gB5unFJt7nSNyRyJqTY3VR2bAtjJ5Xoq8RRq4YeVEB34pJ1mMSDmyV+GIqtzgZs2ZiwGpJ4tFjA==[/tex][tex=32.571x1.286]NjqvWAVrON7tfrtdkkHcO7S0jgW3bzz1l3uyRqKi4PkMEr7Wm2vPCotjmKKSxbFtzf9ZzKScyxFWLhDJ6L1kik1szk5wUVtkPJR9j6eSIP/VOHE3OMHUA7NcUnAjMngP6bXH5aUDCRbMtAV7ZpPg8w==[/tex][tex=38.071x1.286]ohlEq94TktBDlJLdp9BLEscgGjlez3JKU5JU5w/LR+3ycuaUuD5iIUpIdnKPs4ntTdpMmhW1r60GPc/b/jdN4YNHVzjHZO+8AjYH07ymINaSDU7xkDvO/pf9FVxFj8cuH+9z5Q3u/MyOpwTb9URKhVKUSn9z0LH43MGNfN0dJxIiGOYF0a9F7bLutg13bB+U[/tex][tex=23.714x1.286]P8LsX+lbqn1ert7JmnpzVFDSVhzI1Z/E4StQAUNJbf12aWtXsaTnzsPsQsaJxkuR2F3HcES73BjDv/9RDqUGyWWIoaCzzFTOAr5QHpjyz4Yy/guyb6zW8RovA/+Rufjs[/tex]

[tex=29.857x1.286]CYxwPF7BsEvspkxkg/4trUi2D9pl7yxfhxOgivRQvhjhQaqYABaBYKnFkGpu4psS6zVAkHQ+pn/gB5unFJt7nSNyRyJqTY3VR2bAtjJ5Xoq8RRq4YeVEB34pJ1mMSDmyV+GIqtzgZs2ZiwGpJ4tFjA==[/tex][tex=32.571x1.286]NjqvWAVrON7tfrtdkkHcO7S0jgW3bzz1l3uyRqKi4PkMEr7Wm2vPCotjmKKSxbFtzf9ZzKScyxFWLhDJ6L1kik1szk5wUVtkPJR9j6eSIP/VOHE3OMHUA7NcUnAjMngP6bXH5aUDCRbMtAV7ZpPg8w==[/tex][tex=38.071x1.286]ohlEq94TktBDlJLdp9BLEscgGjlez3JKU5JU5w/LR+3ycuaUuD5iIUpIdnKPs4ntTdpMmhW1r60GPc/b/jdN4YNHVzjHZO+8AjYH07ymINaSDU7xkDvO/pf9FVxFj8cuH+9z5Q3u/MyOpwTb9URKhVKUSn9z0LH43MGNfN0dJxIiGOYF0a9F7bLutg13bB+U[/tex][tex=23.714x1.286]P8LsX+lbqn1ert7JmnpzVFDSVhzI1Z/E4StQAUNJbf12aWtXsaTnzsPsQsaJxkuR2F3HcES73BjDv/9RDqUGyWWIoaCzzFTOAr5QHpjyz4Yy/guyb6zW8RovA/+Rufjs[/tex]

如图所示为两个不同结构的锥齿轮周转轮系，已知 [tex=32.571x1.286]iJSvUhAIDoWSaDqG/MOIcEpKOOsa38+SWkOczw9PbVvZKbwmUDKn4HvP6xNZb15d4gTOLPKw4y8rzRp4cU1ddlZhpokgvd/3DZZJciCaSOE=[/tex]。求 [tex=1.214x1.0]HS/KJwF8r8CAK17iN3GsSg==[/tex] 等于多少 ?[p=align:center][img=232x186]17b30475162c5f8.png[/img]

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)