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【判断题】
若A:张明和李红都运动员,则﹁A:张明和李红不都是运动员
A. 对
B. 错
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答案
A
解析
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若P:每一个自然数都是偶数,则﹁P:每一个自然数都不是偶数
A. 对
B. 错
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若P:每个自然数都是偶数,则﹁P:每个自然数不都是偶数
A. 对
B. 错
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如果AB,则A∧CB∧C,A∨CB∨C
A. 对
B. 错
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如果A∧CB∧C,则AB
A. 对
B. 错
【判断题】
联结词“↓”是可结合的
A. 对
B. 错
【判断题】
联结词“↑”是可结合的
A. 对
B. 错
【判断题】
联结词“↓”是可交换的
A. 对
B. 错
【判断题】
联结词“↑”是可交换的
A. 对
B. 错
【判断题】
联结词“→”满足交换律
A. 对
B. 错
【判断题】
“学习有如逆水行舟,不进则退”。设P:学习如逆水行舟,Q:学习进步,R:学习退步。则命题符号化为P∧(﹁Q→R)
A. 对
B. 错
【判断题】
P、Q、R定义同上题,则“学习有如逆水行舟,不进则退”形式化为:P→(﹁Q→R)
A. 对
B. 错
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设P、Q是两个命题,当且仅当P、Q的真值均为1时,PQ的值为1
A. 对
B. 错
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命题公式(P∧(P→Q))→Q是矛盾式
A. 对
B. 错
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命题公式(P∧(P→Q))→Q是重言式
A. 对
B. 错
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联结词∧与∨不是相互可分配的
A. 对
B. 错
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在命题的演算中,每个最小联结词组至少有两个联结词
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A. 对
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命题联结词集{﹁,∧,∨}是最小联结词集
A. 对
B. 错
【判断题】
命题联结词集{∧,→}是最小联结词集
A. 对
B. 错
【判断题】
命题联结词集{↑}和{↓}都是最小联结词集
A. 对
B. 错
【判断题】
A是命题公式,A与(A*)*互为对偶式
A. 对
B. 错
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A是命题公式,A(A*)*
A. 对
B. 错
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P是命题变元,P与P互为对偶式
A. 对
B. 错
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B. 错
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B. 错
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B. 错
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公式 (x)(P(x)→Q(x) )R(y) 中量词x的作用域为P(x)
A. 对
B. 错
【判断题】
同一谓词公式,指定不同的论域,其真值不一定相同
A. 对
B. 错
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谓词公式(x)P(x)(y)﹁P(y)是矛盾式
A. 对
B. 错
【判断题】
(x)(P(x)→Q(x) )→((x)P(x)→(x)Q(x) )为真
A. 对
B. 错
【判断题】
对公式(z)(P(z)∧Q(x,z)∧M(z,y))∨R(z)中自由变量进行代入后,有(z)(P(z)∧Q(a,z)∧M(z,b))∨R(z)
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B. 错
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A. 对
B. 错
【判断题】
P(x)、Q(x)表示谓词,P表示命题,有(x) (P(x)→P)(x)P(x)→P
A. 对
B. 错
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(x) (A(x)∧B(x) )(x)A(x)∧(x)B(x)
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B. 错
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A. 对
B. 错
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A. 对
B. 错
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B. 错
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45.___是国防强大的基础。
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50.精确制导技术是指采用高技术直接命中概率超过___以上的武器。
【单选题】
What is an example of social engineering?___
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B. gaining access to a build through an unguarded entrance
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【单选题】
Which type of Layer 2 attack enables the attacker to intercept traffic that is intended for one specific recipient?___
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【单选题】
Which about nested policy maps in a zone-based firewall is true ?___
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【单选题】
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【单选题】
Which statement about command authorization and security contexts is true?___
A. If command authorization is configured, it must be enabled on all contexts.
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【单选题】
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【单选题】
What feature defines a campus area network?___
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Which term best describes the concept of preventing the modification of data in transit and in storage?___
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Which loS command is used to define the authentication key for ntp?___
A. switch(config )#ntp authentication-key 1 mds Clcs
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When is the default deny all policy an exception in zone-based firewalls?___
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.If an access port is assigned as an isolated port in a PVLAN, which network ports can it communicate with?___
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which type of Pvlan port allows communication from all port types?___
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Which command do you enter to configure your firewall to conceal internal addresses?___
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Which feature defines a campus area network? ___
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which standard is a hybrid protocol that uses oakley and skerne ke y exchanges is an ISAKMP framework?___
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【单选题】
Which NAT type allows objects or groups to reference an IP address ?___
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Which Auto NAT policies are processed first?___
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Which feature allows a dynamic Pat pool to se lect the next address in the pat pool instead of the next port of an existing address?___
A. next IP
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Which type of encryption technology has the broadest platform support?___
A. software
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Which type of address translation supports the initiation of comm unications bidirectionally ?___
A. multi-session PAT
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Which label is given to a person who uses existing computer scripts to hack into computers while lacking the expertise to write the own?___
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【单选题】
What is the primary purpose of a defined rule in an IPS?___
A. to configure an event action that takes place when a signature is triggered
B. to define a set of actions that occur when a specific user logs in to the system
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D. to detect internal attacks
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Which option is the default valuce for the Diffie- Hell man group when configuring a site-to-site VPn on an asa device ?___
A. Group 1
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