【判断题】【消耗次数:1】
实数范围内,有理数集的补集是无理数集.
正确
错误
参考答案:
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相关题目
【判断题】 全体无理数集是可数集.
①  正确
②  错误
【判断题】 全体有理数集是可数集.
①  正确
②  错误
【单选题】 若集合A={有理数},B={无理数},则AUB=( )
①  {实数集}
②  {实数}
③  ?
④  {0}
【判断题】 实轴上的有理数集外测度是0.
①  正确
②  错误
【多选题】 下列数集之间关系正确的是
①  整数集包含自然数集
②  有理数集包含整数集
③  实数级包含有理数集
④  有理数集包含实数集
【单选题】 以下哪个集合不与自然数集对等
①  有理数集
②  无理数集
③  全体偶数集
④  全体奇数集
【判断题】 全体偶数集与自然数集对等.
①  正确
②  错误
【单选题】 下列集合与全体实数集对等的是()
①  (0,1)上全体实数
②  有理数集
③  整数集
④  全体偶数集
【单选题】 Q为有理数集,Q上定义运算*为a*b=a+b-ab,则<Q,*>的幺元为()
①  a
②  b
③  1
④  0
【判断题】 全体实数组成的集是可数集.
①  正确
②  错误
随机题目
【单选题】 John is not [填空] young as you.
①  so
②  more
③  much
④  much more
【单选题】 I often watch [填空] TV in [填空] evening.
①  a,the
②  an,the
③  /,the
④  /,a
【单选题】 May [填空] speak to Jack?
①  I
②  me
③  us
④  we
【单选题】 When we speak to people, we should be ______.
①  as polite as possible
②  as polite as possibly
③  as politely as possible
④  as politely as possibly
【单选题】 He arrived [填空] Guiyang [填空] night.
①  in; in
②  to; at
③  in; at
④  at; in
【单选题】 His father began to work ______ he was seven years old.
①  as old as
②  as early as
③  as soon as
④  as much as
【单选题】 There is an apple [填空] the tree.
①  in
②  on
③  at
④  for
【单选题】 Sunday is the?[填空] day of a week.
①  one
②  first
③  second
④  a
【单选题】 The watermelon is [填空] sweet as that one.
①  as
②  so
③  for
④  in
【单选题】 We traveled to Korea and arrived [填空] 7 o’clock [填空] the morning.
①  on; in
②  at; in
③  at; on
④  in; on