计算学院 第_二_学期《离散数学》(下)试卷(A卷)及参考答案A
-
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
和
《离散数学(下)
》考试试卷(
A
卷)
(时间
120
分钟)
院
/
系
专业
姓名
学号
题
号
一
二
三
四
五
六
七
总分
得
分
一、单项选择题(每小题
2
分,共
20
分)
得
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.
设
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.
设
N
6
{0,1,
,5}
,
6
为模
6
加法,则下列元素是
N
6
,
6
的生成元的是(
)
A.2
;
B.3
;
C.4
;
D.5
。
4.
设
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.
设
S
{
1,2,4,8}
,
和
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
,
则
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
p>
仅有
2
个结点的度数是奇数,则
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)
得
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
和
1.
设
< br>R
为实数集合,
S
{
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.
设
10
为模
10
加法,则在
{0,1
,
,9},
10
p>
中,元素
5
的阶
为_
__,
6
< br>的阶为_
__。
3.
设
S
1
10
{
1
,
2,5,10,11
,22,55,110}
,
gcd
和
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
p>
中,原子的个数为_
__,元素
22
的补元为_
__。
4.
在格
L
,
,
中,
a
,
b
p>
L
,
a
b
当且仅当
a
b
_
__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
分,共
20
分)
1.
设图
G
如图
1
所示,
(1)
求
G
的邻接矩阵
A
;
(2)
求
A
(2)
,
A
(3)
,
A
(4)
,说明从
v
1
到
v
< br>4
的长为
2,3,4
的路径各有
几条;
(3)
求
< br>G
的可达矩阵
P
;
(4)
求
G
的强连通分图。
得
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
和
p>
四、证明题(每小题
10
分,共
40
分)
1.
证明布尔恒等式:
(
a
b
)
(
a
c
p>
)
(
b
c
)
(
a
< br>b
)
c
。
得
分
2.
设
R
为实数集合,
和
为数的加法和乘法运算,对
a
,
b
p>
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
第
3
页
共
4
页