A . A、http：//localhost/script？’：EXEC+master..XP_cmdshell+’dir’：--
B . B、http：//localhost/script？1’：EXEC+master..XP_cmdshell+’dir’：--
C . C、http：//localhost/script？0’：EXEC+master..XP_cmdshell+’dir’：--
D . D、http：//localhost/script？1’：EXEC+master..XP_cmdshell+’dir’--
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