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A.若A∪B，則AB

B.若A∩B≠A，則AB

C.若AB，則A∩B≠A

D.若AB，則A∩B≠A

A.若A∪B,則AB

B.若A∩B≠A,則AB

C.若AB,則A∩B≠A

D.若AB,則A∩B≠A

A.若A∪B，則AB

B.若A∩B≠A，則AB

C.若AB，則A∩B≠A

D.若AB，則A∩B≠A

A.若A∪B,則AB

B.若A∩B≠A,則AB

C.若AB,則A∩B≠A

D.若AB,則A∩B≠A

命題“若a>b,則a-8>b-8”的逆否命題是(    )

A.若a<b，則a-8<b-8                    B.若a-8>b-8，則a>b

C.若a≤b,則a-8≤b                      D.若a-8≤b-8，則a≤b