选择 [tex=1.071x1.214]RsDuJe0gfH4LhyvenBTDjg==[/tex] 与 [tex=0.571x1.0]rFc/sfAAuCOtzhevhoREeA==[/tex],使下列九元排列为奇排列。[tex=13.286x1.643]CeOWlpLvH8Qhk/RmfIvBHeYt3eTMJT5OCgoxHLNQMN46Ieoi41wGXOj7QuP7wqJvyde68MQXaibnsCaJYql4X61KnxH2gGJ50lxb2bd2ZnU=[/tex]

某一单质晶体的肖特基缺陷形成能为4ev，则该晶体在1200K时的空位浓度为（ ）。 A: 1.179×10-17 B: 1.643×10-17 C: 2.699×10-17 D: 4.435×10-17

选择 [tex=1.071x1.214]RsDuJe0gfH4LhyvenBTDjg==[/tex] 与 [tex=0.571x1.0]rFc/sfAAuCOtzhevhoREeA==[/tex],使下列九元排列为奇排列。[tex=13.286x1.643]CeOWlpLvH8Qhk/RmfIvBHSKaTIEWp2vUi+PN/6uZL/8lKT1cYuYRy5gJwtt82LhPlSg27vUbkC7JT210HsE1PhIxTE4TtN4EiWK7qBjv7pE=[/tex]

试通过计算比较[tex=5.643x1.5]fnVvaNDvq5TSeLyMO/zD9qqtHMIfmEOjxxFi3rwTcFD22EqAsXZQvo2JUiQigNyu1oFx5uKaOx7A7lnm4vkYvA==[/tex]和[tex=5.071x1.5]ZnqpnxSwz8k1U8Eg7JeL7SglcQIeJuCEITrGhe2y3Ejq0pkCxrtcZcmSemu5sotk[/tex]氧化能力的相对强弱。(已知[tex=10.357x1.5]lj2bMQqi5z3WNQ4id/iW/hhVAy/dshMLieH3i4tyfh8k/1F5YV6N9nF1f3Rd7sLBHCElPCgU6BQgkMEg9r0ubg==[/tex] ,[tex=13.571x1.643]5HM5m8SLihyzwTcH0gaaxlFEity5BmiA31MZX0085XTUrT5LKugAN7oEgI0+83rT7IeaNVlOovpsP/WojW8DY0ElFE7qKFSA+BcM/JBFkEnKJcRR53gu3n2VAlcpErQ6dV6fGCeVlwuR7SDQjDHP0A==[/tex]，[tex=13.286x1.643]BlVlSkdk8ZA5nwl0pztFcanjP5RFFJ+Imv5zyFQya3WDTqMKkWlZNtnY/zZjFYl+4E5BQN6NXhvT9Ho4sJPq7y6+26xgkwGvijqtd2em92s=[/tex].）

试通过计算比较[tex=5.643x1.5]fnVvaNDvq5TSeLyMO/zD9qqtHMIfmEOjxxFi3rwTcFD22EqAsXZQvo2JUiQigNyu1oFx5uKaOx7A7lnm4vkYvA==[/tex]和[tex=5.071x1.5]ZnqpnxSwz8k1U8Eg7JeL7SglcQIeJuCEITrGhe2y3Ejq0pkCxrtcZcmSemu5sotk[/tex]氧化能力的相对强弱。(已知[tex=10.357x1.5]lj2bMQqi5z3WNQ4id/iW/hhVAy/dshMLieH3i4tyfh8k/1F5YV6N9nF1f3Rd7sLBHCElPCgU6BQgkMEg9r0ubg==[/tex] ,[tex=13.571x1.643]5HM5m8SLihyzwTcH0gaaxlFEity5BmiA31MZX0085XTUrT5LKugAN7oEgI0+83rT7IeaNVlOovpsP/WojW8DY0ElFE7qKFSA+BcM/JBFkEnKJcRR53gu3n2VAlcpErQ6dV6fGCeVlwuR7SDQjDHP0A==[/tex]，[tex=13.286x1.643]BlVlSkdk8ZA5nwl0pztFcanjP5RFFJ+Imv5zyFQya3WDTqMKkWlZNtnY/zZjFYl+4E5BQN6NXhvT9Ho4sJPq7y6+26xgkwGvijqtd2em92s=[/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)

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)

判断下列推证是否正确。 (∀x)(A(x)→B(x))⇔(∀x)(￢A(x)∨B(x)) ⇔(∀x)￢( A(x)∧￢B(x) ) ⇔￢(∃x) ( A(x)∧￢B(x) ) ⇔￢( (∃x)A(x)∧(∃x)￢B(x) ) ⇔￢(∃x)A(x)∨￢(∃x)￢B(x) ⇔￢(∃x)A(x)∨(∀x)B(x) ⇔(∃x)A(x)→(∀x)B(x)