计算学院 第_二_学期《离散数学》(下)试卷(A卷)及参考答案A

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2021年02月13日 21:25
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2021年2月13日发(作者:摆渡人票房)


relationship, establi


she


d equivale


nt relationshi


p 14, and subje


ct: a


ppli


cation problem (4)--scores a


nd


perce


ntage applicati


on


problem review


conte


nt overvie


w answers score


s, and perce


ntage applicati


on


nation graphics


problem of key is: a


ccordi


ng to mea


ning, (1) determi


ne standard v


corresponds to


he


n in-line


sol


ution. Categ


ory fraction multipli


cation w


ord pr


of cuboi


oblem


score Divisi


on a


ppli


cations e


ngineering


problem problem


XV, a


subject: review of the measureme


nt of the


amount of ca


e ...


pacit


y, measurement a


nd


units


of measureme


nt of common


units


of measureme


nt and their


significa


nce


in rate 1,


curre


ncy, le


ngth, area


, volume


, unit size, v


olume, weight a


nd rate. (Omitted) 2, comm


only


used time


unit


s and their relati


onshi


ps. (Slightly) with


a measureme


nt units Zhi


jian


of of poly


1, and of method


2, and poly method 3, and of


method a


nd


poly met


hod of relationship measurement


distance


of method 1, a


nd tool measurement 2, and estimates 16, and subje


ct: ge


ometry preliminary knowledge (1)


--line and angl


e review


conte


nt line, and segme


nt, and Ray, a


nd verti


cal, a


nd


parallel, a


nd a


ngle a


ngle of


classificati


on (slig


htly) 17, and


subject


: geometry prelimi


nary knowledge (2)--pla


ne graphics review content tria


ngle, and edge


s sha


pe


d, and round, a


nd fan axisymmetric gra


phi


cs perimeter a


nd area


combi


of area subject :


Preliminary k


nowle


dge (3)


-review


olume (units


of solid


content categ


ory 1-d sha


pes are divi


ded i


nto:


cylinder and cone 2, col


umn is


divide


d into: cuboid, squar


e 3, cone


cone of the features


ds and cube


s relationshi


p betw


een


chara


cteristics


of circular cone i


s slightly solid


surface area a


nd v


olume 1, size 2, tabl


< p>
《离散数学(下)


》考试试卷(


A


卷)



(时间


120


分钟)





/



















专业


















姓名


















学号







































总分


















一、单项选择题(每小题


2


分,共


20


分)







1.


下列集合关于数的加法和乘法运算不能构成环的是(





A.


自然数集合;


B.


整数集合;


C.


有理数集合;


D.


实数集合。



2.



I


为整数集合,则下列集合关于数的加法运算不能 构成独异点的是(





A.


I



B.


{2


k


|


k



I


}


;< /p>


C.


{2


k


1|


k



I


}



D.


{3


m



5

< br>n


|


m


,


n



I


}




3.



N


6



{0,1,


,5}




6


为模


6


加法,则下列元素是



N


6


,


< p>
6



的生成元的是(





A.2



B.3



C.4



D.5




4.



F


,



,




是整 环,则



F


,



,




不一 定是(





A.


可交换环;


B.


无零因子环;


C.


含么环;


D.


域。



5.


格不一定具有(





A.


交换律;


B.


结合律;


C.


分配律;


D.


吸收律。



6.



S



{

1,2,4,8}





分别表示求最小公倍数和最大公约数运算,则



S


,


,



< /p>


是(





A.


有补格;


B.


分配格;


C.


有补分配格;


D.


布尔代数。



7.


一个含


4


个结点的无向图中有


3


个结点的度数分别为


1,


2,3< /p>


,则第


4


个结点的度数不可能是(



A.0



B.1



C.2



D.4




8.

设连通的简单平面图


G


中有


10< /p>


条边和


5


个面,则


G


的结点数为(





A.6



B.7



C.8



D.9




9.

设无向树


T


中有


1


个结点度数为


2



2


个结点度数为


3



3< /p>


个结点度数为


4




T


中的树叶数为




A.10



B.11



C.12



D.13




10.

< br>设


G


为连通的无向图,若


G


仅有


2


个结点的度数是奇数,则

< p>
G


一定具有(





A


、欧拉路径;


B


、欧拉回路;


C


、哈密尔顿路径;


D


、哈密尔顿回路。





二、填空题(每小空


2


分,共


20


分)











relationship, establi


she


d equivale


nt relationshi


p 14, and subje


ct: a


ppli


cation problem (4)--scores a


nd


perce


ntage applicati


on


problem review


conte


nt overvie


w answers score


s, and perce


ntage applicati


on


nation graphics


problem of key is: a


ccordi


ng to mea


ning, (1) determi


ne standard v


corresponds t


o


he


n in-line


sol


ution. Categ


ory fraction multipli


cation w


ord pr


of cuboi


oblem


score Divisi


on a


ppli


cations e


ngineering


problem problem


XV, a


subject: review of the measureme


nt of the


amount of ca


e ...


pacit


y, measurement a


nd


units


of measureme


nt of common


units


of measureme


nt and their


significa


nce


in rate 1,


curre


ncy, le


ngth, area


, volume


, unit size, v


olume, weight a


nd rate. (Omitted) 2, comm


only


used time


unit


s and their relati


onshi


ps. (Slightly) with


a measureme


nt units Zhi


jian


of of poly


1, and of


method


2, and poly method 3, and of


method a


nd


poly met


hod of relationship measurement


distance


of method 1, a


nd tool measurement


2, and estimates 16, and subje


ct: ge


ometry preliminary knowledge (1)--line and angl


e review


conte


nt line, and segme


nt, and Ray, a


nd verti


cal, a


nd


parallel, a


nd a


ngle a


ngle of


classificati


on (slig


htly) 17, and


subject


: geometry prelimi


nary knowledge (2)--pla


ne graphics review content tria


ngle, and edge


s sha


pe


d, and round, a


nd fan axisymmetric gra


phi


cs perimeter a


nd area


combi


of area subject :


Preliminary k


nowle


dge (3)


-review


olume (units


of solid


content categ


ory 1-d sha


pes are divi


ded i


nto:


cylinder and cone 2, col


umn is


divide


d into: cuboid, squar


e 3, cone


cone of the features


ds and cube


s relationshi


p betw


een


chara


cteristics


of circular cone i


s slightly solid


surface area a


nd v


olume 1, size 2, tabl



1.


< br>R


为实数集合,


S


< p>
{


x


|


x



R



0


x



1


}


,则在代数



S

,max


>


中,



S


关于


max


运算的么元是_



__,零元是_



__。



2.




10


为模


10


加法,则在



{0,1


,


,9},



10



中,元素


5


的阶 为_



__,


6

< br>的阶为_



__。



3.



S


1 10



{


1


, 2,5,10,11


,22,55,110}



gcd



lcm


分别为求最大 公约数和最小公倍数运算,



则在布尔代数


S


110


,gcd,lcm



中,原子的个数为_



__,元素


22


的补元为_



__。



4.


在格



L


,



,




中,



a


,


b



L



a



b


当且仅当


a



b



_

< p>


__当且仅当


a



b



_



__。



5.


一个具有


n


个结点的简单连通无向图的边数至少为_



__,至多为_



__。




三 、解答题(第


1


小题


12


分,第


2


小题


8

< p>
分,共


20


分)



1.


设图


G


如图


1


所示,



(1)



G


的邻接矩阵


A




(2)



A


(2)


,


A


(3)

,


A


(4)


,说明从


v


1



v

< br>4


的长为


2,3,4


的路径各有 几条;



(3)


< br>G


的可达矩阵


P




(4)



G


的强连通分图。










1























2.


求群



N


8< /p>


,



8



的所有子群及由元素


5


确定的各子群的左陪集 ,


其中


N


8



{0,1


,




,7}




8

是模


8


加法。




relationship, establi


she


d equivale


nt relationshi


p 14, and subje


ct: a


ppli


cation problem (4)--scores a


nd


perce


ntage applicati


on


problem review


conte


nt overvie


w answers score


s, and perce


ntage applicati


on


nation graphics


problem of key is: a


ccordi


ng to mea


ning, (1) determi


ne standard v


corresponds to


he


n in


-line


sol


ution. Categ


ory fraction multipli


cation w


ord pr


of cuboi


oblem


score Divisi


on a


ppli


cations e


ngineering


problem problem


XV, a


subject: review of the measureme


nt of the


amount of ca


e ...


pacit


y, measurement a


nd


units


of measureme


nt of common


units


of measureme


nt and their


significa


nce


in rate 1,


curre


ncy, le


ngth, area


, volume


, unit size, v


olume, weight a


nd rate. (Omitted) 2, comm


only


used time


unit


s and their relati


onshi


ps. (Slightly) with


a measureme


nt units Zhi


jian


of of poly


1, and of method


2, and poly method 3, and of


method a


nd


poly met


hod of relationship measurement


distance


of method 1, a


nd tool measurement 2, and estimates 16, and subje


ct: ge


ometry preliminary knowledge (1)


--line and angl


e review


conte


nt line, and segme


nt, and Ray, a


nd verti


cal, a


nd


parallel, a


nd a


ngle a


ngle of


classificati


on (slig


htly) 17, and


subject


: geometry prelimi


nary knowledge (2)--pla


ne graphics review content tria


ngle, and edge


s sha


pe


d, and round, a


nd fan axisymmetric gra


phi


cs perimeter a


nd area


combi


of area subject :


Preliminary k


nowle


dge (3)


-review


olume (units


of solid


content categ


ory 1-d sha


pes are divi


ded i


nto:


cylinder and cone 2, col


umn is


divide


d into: cuboid, squar


e 3, cone


cone of the features


ds and cube


s relationshi


p betw


een


chara


cteristics


of circular cone i


s slightly solid


surface area a


nd v


olume 1, size 2, tabl

















四、证明题(每小题


10


分,共

< p>
40


分)



1.


证明布尔恒等式:


(


a



b


)



(


a




c


)



(


b




c


)



(


a


< br>b


)



c




















2.



R


为实数集合,




为数的加法和乘法运算,对



a


,


b



R



a


*


b



a



b



a

< br>


b




证明:



R


,




为独异点。


















3.


证明:若


(


n


,


m


)


简单无向图

G


满足


m



1


(


n



1


)(


n



2< /p>


)


,则图


G


是连 通图。



2




离散数学



》试卷





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4





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