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+eUqOKAnDxpbWcgd2lkdGg9OSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRS9BMC9yQkFDSjFTZ3RSLWdIVEZkQUFBQTd1dFRGTWs3NDYucG5nIj7igJ3ooajnpLo=
提示2:
IOWtkOmbhuS5i+mXtOeahOWFs+ezu+eUqOKAnDxpbWcgd2lkdGg9MTAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjIvNUYvckJBQ0UxU2d0Ul93UHlnTkFBQUE1LUZXQjJZNTE1LnBuZyI+4oCd6KGo56S6
正确答案:RA==
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