挑战习题
1/5单选题
难度:

1.已知A=,则有(    )
A
B
C
D
提示1:
IOWFg+e0oOS4jumbhuWQiOS5i+mXtOeahOWFs+ezu+eUqOKAnDxpbWcgd2lkdGg9OSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zMC8yNy9yQkFDRkZQUi1MVGhBNWprQUFBQTdnWVJmQzQwODUucG5nIj7igJ3ooajnpLo=
提示2:
IOWtkOmbhuS5i+mXtOeahOWFs+ezu+eUqOKAnDxpbWcgd2lkdGg9MTAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMzAvMjcvckJBQ0ZGUFItTFNoWURwdUFBQUE1MG1RTzk4NjQxLnBuZyI+4oCd6KGo56S6
正确答案:RA==
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