以下化合物的酸性大小次序为[img=792x226]17aa98e01ddeceb.png[/img] 未知类型：{'options': ['[tex=14.357x1.357]NUJ8dfBF7vtwq+FmQoXL9kDODnP46X3oZhgEaSNT+Xo=[/tex]', '[tex=14.357x1.357]4pK68S4zBCUhBeRexKWGQkHGwzMh4by8n3y9J6HbQaA=[/tex]', '[tex=14.357x1.357]dqQBW7hZLYDMXSyqp2IlEB9kE/v1EdmzjiJpyZkRcx0=[/tex]', '[tex=14.357x1.357]wDh7HZYukTXjkvR7bZTXAR4+hbCVH0lv5jYvGsm7Wq8=[/tex]', '[tex=14.357x1.357]Aoi6w5kHH+Nm5EKJP6ibVhoJzmtYhaPTGC4JAuecB4A=[/tex]'], 'type': 102}

用卡诺图化简下列逻辑函数为最简与-或表达式:[br][/br][tex=14.357x1.357]Tumbntd5DLTHc4dZvmDDbD45HFWIKz4zk7w7q3OSV6jXRie8+2VQUGpwhGyj/B27[/tex]

简支梁在跨中受集中载荷 [tex=14.357x1.357]y3xlwRJOeaImai14T4C8NakpbTzJ2bmOsPMYxNqwrbx4OYafSd1CYmQAk52KZIFL[/tex] 。试为梁选择工字钢型号。[img=321x327]17acd263c355b56.png[/img]

反应[tex=14.357x1.357]KZeAEccz9QvxeIKZa/eHlGj0sh4EF7DOknPYCDUYMPi6JBIIE8CBLp0Z8dNFVGc9ngCkE0siB+xnCPcOaNDkhA==[/tex] 已知[tex=2.357x1.0]/NnQehdlK2QR+QNALFVBUw==[/tex] 时[img=663x156]17a6cdfdce5ddce.png[/img]在什么温度下对反应有利于从左向右进行?

对以下各序列, 试求其 DTFT, 即求[tex=3.214x1.571]V5CZPDBh0gnsQzqmO1OBVcj/m9aoHrMEaeoW5MsLQnWg0FR6zg/nQYFBi5BX3E63[/tex], 画出 [tex=3.857x1.571]CTjHrgs62ORrq5JoCpZLTdkY5ANEP2IstltjLfH5mxMwqmtXQnrTUL4Wmi7i0HC3rnLDFkbUa1/VbBJ6A9MASw==[/tex]及[tex=5.429x1.571]eGj96umWBFSx5UdXDBlEXOhGz3d+D4O01AHZ5UlIrRYOBUTQsmZ1eRoInAn2dumQUXPasfeFvHAzDIHkK9JfxwHaJmHsHud7vqq/XmGz1n8=[/tex]。[tex=14.357x1.357]79HHsp/CIBPhox5P6fKqloVgM4N1eTt3LdiBfwAizc4=[/tex]

已知某采样系统的输入输出差分方程为[tex=18.857x1.357]+V7hps5DfEOClTSIhmgTILClJpbJqoK5Jk55R41m4l1qu9u4byBHSCwOcSR2mOQdveOSl1q5bratrhOhh2WctCfdxc3b4SF6NSvUtb6SI+M=[/tex][tex=14.357x1.357]xvC5aGkEau1aqTbgoroEk6cj6g+gKNG1sa4h19Sy2UVqlxET6Tho9jdJ17+Oh6zfV81K/V1/bTImzVWIg+HnhA==[/tex]试求该系统的脉冲传递函数[tex=5.286x1.357]tYqUgpu1BykAF9S6nliFu1MevIDwV+O0S6nQnBPT5kY=[/tex]和脉冲响应。

如果条件 [tex=0.786x1.286]BlkXDnmzWHxe4M6E9LlofQ==[/tex] 形为[tex=4.143x1.214]F0sdiE1z5Kq3vY4fuykI8Nk2F/k6wlARFGNjEFr/CA0=[/tex] 仅涉及到[tex=1.143x1.214]fka3aKdDfpgPhJacNaM4YA==[/tex] 中的属性, [tex=1.0x1.214]6ns9WPkDv7wTtBprGChOug==[/tex]仅涉及到 [tex=1.143x1.214]iASk972IwlYmkxCYFEHEcQ==[/tex] 中的属性,则有 未知类型：{'options': ['[tex=14.357x1.357]j3YLSyjR0MF0QC1nP/n0Nf2xOzrV8GRSkzE6JuqVjYEEMdjCY9dyZ9piW15E5rqaeSX6s7zkWXvRN7M1Zib/JsQEx9L4MUo8AKjkoak1su0v7FP20qAtikieCualM7ySf8uPrxkaiIkO5+Pr40ZFJSlrltC0Z4QiDzIFe86gIuogyEuZtQQ8Uyup170it0Hu[/tex]', '[tex=15.143x1.357]j3YLSyjR0MF0QC1nP/n0Nf2xOzrV8GRSkzE6JuqVjYEEMdjCY9dyZ9piW15E5rqaeSX6s7zkWXvRN7M1Zib/JmE1lUeqDoC8/bDo6VViufpZsMy8XkT1Yi0Ca6e5ctK2/7Sv2ZWlMXToDsQNevq5N3YhLU6ehUv1OagHzUphQ5wc7uhPnuQd6ECm3YUAxUlH[/tex]', '[tex=15.143x1.357]j3YLSyjR0MF0QC1nP/n0Nf2xOzrV8GRSkzE6JuqVjYEEMdjCY9dyZ9piW15E5rqaeSX6s7zkWXvRN7M1Zib/JoJvsDAUvvBBFVRM9Uth929+FkbLt9C7PRociHEgnq6eEmAkyaRDXgRNwpGkHMRw9jbRQOkU2N6Lu0j8srNHSniGGTl3n8yv9g+sli8t5ysr[/tex]', '[tex=14.357x1.357]j3YLSyjR0MF0QC1nP/n0Nf2xOzrV8GRSkzE6JuqVjYEEMdjCY9dyZ9piW15E5rqaeSX6s7zkWXvRN7M1Zib/JrUYq3MKbHjl7Pc3DRi9AOWPoL2aK0mm1gzbwJX21db/23peYaazBeW5/kb4/SNbpuy9cTBCv+O/21DMil0ybLUmEQ3dgSBOEHqWYXpC6tB0[/tex]'], 'type': 102}

设 [tex=2.929x1.357]E2ncv6Z0oCXGAPDBARphx8+xgtcV9vaOVbeINkHwXpDq67RLSgZJVsep3DJrlsKo[/tex]和[tex=2.929x1.357]E2ncv6Z0oCXGAPDBARphx95orddN8RzBQgmURBrtFP2FeLpQn1Gaz0kzxE1q68AV[/tex]都是群 [tex=2.357x1.357]5yyyK/pg6fsnVfZXwglN75Smron25hFDRSEC/NLDaMM=[/tex]的子群, 且此一者之一为正规子群. 试证 [tex=5.571x1.214]AQUGHx66eZ2ocC3jiSVMuN2ZOM3fkz9M78d8niz/2HA=[/tex], 其中 [tex=14.357x1.357]jl8ETBn8UxlgI3NuCK2oZMHDlEEk4BhmilJkTl80/5yBFSwy3ZyE9HPc8ft0JIW/xcP1b1H+1uHljzzKXY6wu00oyp2kYZxiPEQ7yeqrOvRFb+2UNDM5DnPYtOTHQ27J+pjeYsL5sk56GVj+uBOIZw==[/tex]

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)