A.REVOKE ALL PRIVILEGES FROM USER tom
B.REVOKE ALL ON EMPLOYEE FROM USER tom
C.REVOKE EXECUTE ON EMPLOYEE FROM USER tom
D.REVOKE PRIVILEGES ON EMPLOYEE FROM USER tom
参考答案：B
AREVOKEALLPRIVILEGESFROMUSERtomBREVOKEALLONEMPLOYE
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