挑战习题
1/5单选题
难度:

1.下列集合表示方法正确的是(    )
A
B
C
D 不等式的解集是为
提示1:
IOmbhuWQiDxpbWcgd2lkdGg9NjIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjIvNUUvckJBQ0UxU2dzZGZ5R09tdEFBQUJ0eXBQZ2lFOTkzLnBuZyI+5Lit5pyJ55u45ZCM5YWD57Sg
正确答案:Qw==
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