【简答题】【消耗次数：1】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则对称差关系A⊕B等于：[填空1]
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相关题目
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则交关系A∩B等于：[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则交关系A∩B的值域ran(A∩B)等于：[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则并关系A∪B的定义域dom(A∪B)等于：[填空1]
【判断题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则并关系A∪B的定义域dom(A∪B)等于：{1,2,3,4}。
①
正确
②
错误
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则求差关系A-B。
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，求交关系A∩B的值域ran(A∩B)。
【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则对称差关系A⊕B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，求差关系A-B的域fld(A-B)。
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，求并关系A∪B的定义域dom(A∪B)。
【单选题】
设 A = {1, 22, 43, 3}，B = {1, 32, 44, 2}，则差关系A-B等于：
①
{1,21,32,43,34,2
②
{2,4
③
{1,21,33,34,2
④
{1,23,3}.
随机题目
【单选题】
10.Mother advised him that Tom is not a good guy to ______.
①
associate with
②
care about
③
touch
④
be concerned with
【单选题】
18.He told me he saw it , but _____fact he wasn’t really there.
①
in point of
②
at point of
③
about point of
④
from point of
【单选题】
21.Sex education in primary school is still a big _____ in China today.
①
question
②
issue
③
problem
④
event
【单选题】
24.All the President’s Men _____ one of the important books for scholars who study the Watergate Scandal.
①
remains
②
remained
③
remain
④
is remaining
【单选题】
22.Plant your fig-tree _________ there is plenty of sunshine.
①
that
②
where
③
which
④
how
【单选题】
17.She is stupid, but it’s different _____ Mary; she is just lazy.
①
in case
②
in case of
③
in case that
④
in the case of
【单选题】
15.We would have arrived two hours ago _____the traffic jam.
①
because of
②
as a result of
③
despite
④
but for
【单选题】
17.Some tourists went to the beach; _____ explored the town.
①
the other
②
other
③
others
④
. another
【单选题】
8. The Labour Party ______ that the government give an explanation.
①
asked
②
demanded
③
told
④
said
【单选题】
2. He was _______ manager of the office.
①
appointed
②
objected
③
ensured
④
promoted