【判断题】【消耗次数：1】
空集是完备集.
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
关于极小支配集与极大点独立集，如下说法不正确的是：
①
极小支配集不一定是最小支配集；
②
极大点独立集不一定是最大点独立集；
③
极大点独立集一定是极小支配集；
④
极小支配集一定是点独立集。
随机题目
【单选题】
7.When we go abroad we are always being ______ around like a group of mentally disabled people.
①
guided
②
.ushered
③
introduced
④
displayed
【单选题】
9. All correspondence ______ to the editor should be sent by airmail.
①
addressed
②
sent
③
signaled
④
went
【单选题】
11.Since family ______children’s character, he encouraged parents to teach children reading.
①
formed
②
shaped
③
built
④
made
【单选题】
17. It was the headmaster _____ gave us the leave to go to the concert.
①
who
②
whom
③
that
④
which
【单选题】
15.It was on the day my first son was born _____ I put them in the soil.
①
when
②
who
③
that
④
where
【单选题】
19.Our school library is ________ closed for repairs.
①
shortly
②
quickly
③
temporarily
④
rapidly
【单选题】
24. They are teachers and dont realize ______ to start and run a company.
①
what it takes
②
what takes it
③
what they take
④
what takes them
【单选题】
21.If it ________ tomorrow, the match would be put off.
①
will rain
②
were to rain
③
was raining
④
had rained
【单选题】
4.The wedding ceremony is exactly ____ to coincide with his parents’ wedding anniversary.
①
timing
②
time
③
happening
④
timed