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甲校安排P、Q、R、W,X、Y、Z这7名学生中的数名去乙校参观,要求至少3名最多5名学生去乙学校,其余剩下的
A.P、Q、XR、W、Y、Z
B.Q、R、Z P、W、X、Y
C.R、Q、YX、W、P、Z
D.R、W、Y、ZP、Q、X
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.P、Q、XR、W、Y、Z
B.Q、R、Z P、W、X、Y
C.R、Q、YX、W、P、Z
D.R、W、Y、ZP、Q、X
A.殷红yīn hóng 彷徨páng huáng 鲜为人知xiān wéi rén zhī 妇孺皆知fù rú jiē zhī
B.咳嗽ké sou 狭隘xiá yì 气冲斗牛qì chōng dǒu niú 锲而不舍qiè ér bù shě
C.校补xiào bǔ 抹杀mǒ shā 燕然勒功yān rán lè gōng 马革裹尸mǎ gé guǒ shī
D.元勋yuán xūn 选聘xuǎn pìn 精神抖擞jīng shén dǒu sǒu 兀兀穷年wù wù qióng nián
A.追溯(zhuī sù) 锵然(qiāng rán) 行辈(hángbèi)
B.陨石(rǔn shí) 斡旋(wò xuán ) 凫水(fú shuǐ )
C.劫难(jié nàn ) 冗杂(rǒng zá) 撺掇(cuān duo)
D.潮汐(cháo xī) 两栖(liǎng qī) 脑畔(nǎo pàn)
A.∃x∃y∀z(P(x,y)∨¬Q(z)∨R(x))
B.∃x∃y∃z(P(x,y)∨¬Q(z)∨R(x))
C.∃x∃y∀z(P(x)∨¬Q(z)∨R(x))
D.∃x∃y∀z(P(x,y)∨Q(z)∨R(x))
判断下列子句集中哪些是不可满足的: (1)S={~P∨Q,~Q,P,~P} (2)S={P∨Q,~P∨Q,P∨~Q,~P∨~Q} (3)S={P(y)∨Q(y),~P(f(x))∨R(a)} (4)S={~P(x)∨Q(x),~P(y)∨R(y),P(a),S(a),~S(z)∨~R(z)} (5)S={~P(x)∨~Q(y)∨~L(x,y),P(a),~R(z)∨L(a,z),R(b),Q(b)} (6)S={~P(x)∨Q(f(x),a),~P(h(y))∨Q(f(h(y)),a)∨~P(x)} (7)S={P(x)∨Q(z)∨R(x),~P(y)∨R(y),~Q(a),~R(b)} (8)S={P(x)∨Q(z),~Q(y)∨R(y),~P(z)∨Q(z),~R(u)}
A.R(e)
B.W
C.P(Δi)
D.Q(Δk)