【单选题】【消耗次数:1】
设A={{1,2,3},{4,5},{6,7,8}},下列选项正确的是(   )
1∈A
{1,2,3}A
{{4,5}}A
∈A
参考答案:
复制
纠错
相关题目
【单选题】 设A={{1,2,3},{4,5},{6,7,8}},下列选项正确的是(   )
①  1∈A
②  {1,2,3}<imgwidth="15"height="15"src="../uploadfiles/word/lsss002.files/image038.png">A
③  {{4,5}}<imgwidth="15"height="12"src="../uploadfiles/word/lsss002.files/image039.png">A
④  <imgwidth="16"height="17"src="../uploadfiles/word/lsss002.files/image040.png">∈A
【单选题】 若有说明:inta[][3]={{1,2,3},{4,5},{6,7}};则数组a的第一维的大小为:()。
①  2
②  3
③  4
④  无确定值
【单选题】 若有说明:int a[][3]={{1,2,3},{4,5},{6,7}}; 则数组a的第一维的大小为:()
①  2
②  3
③  4
④  无确定值
【单选题】 已知inta[4][4]={{1,2},{3},{4},{1,2,3}};问a[2][0]该元素的值是()
①  2
②  3
③  4
④  1
【单选题】 这条旋律 “3 4 | 5 6 2 3 | 4 - 1 2 | 3 3 2 2 | 2 1 ||”的节拍为( )
①  2/4
②  3/4
③  4/4
【单选题】 若有定义:int a[][3]={1,2,3,4,5,6,7,8};,则a数组的行数为()
①  无确定值
②  3
③  2
④  1
【单选题】 有定义语句“int a[][3]={1, 2, 3, 4, 5, 6};”,则a[1][0]的值是____。
①  4
②  1
③  2
④  5
【单选题】 若有以下定义,则数组元素a[3]的值是()。int a[5]={1,2,3}
①  0
②  1
③  2
④  3
【单选题】 若向量a={1,2,3} b={2,3,4},则a与b的数量积为
①  19
②  20
③  21
④  22
【单选题】 集合{1, 2,3}与集合{2,3,4,5}的交集是( )
①  {1,2,3,5}
②  {1,5}
③  {2,3}
④  {1,3,4,5}
随机题目
【单选题】 Next month I _______a meeting with an organization in New York.
①  would have
②  am having
③  was having
【单选题】 I get_______ my colleagues very well.
①  on
②  on with
③  over
【判断题】 A: May I ask a question after class, Madam? B: Sure.
①  正确
②  错误
【判断题】 A: May I have your order now? B: No, I don’t have a choice of meat.
①  正确
②  错误
【判断题】 She doesn’t do her work on weekdays, does she?
①  正确
②  错误
【判断题】 Once you play pingpang, you’ll find great pleasure.
①  正确
②  错误
【单选题】 That young boy couldn’t move because he _______ his leg.
①  breaks
②  broke
③  had broken
【单选题】 The ship sank on its first _______.
①  travel
②  journey
③  voyage
【单选题】 It was 12 o’clock _______we got home from the party yesterday.
①  when
②  what
③  which
【单选题】 _______ by bus is slow and difficult in some districts.
①  Travel
②  Journey
③  Trip