單項(xiàng)選擇題在ORACLE9.2.0.1.0數(shù)據(jù)庫中,執(zhí)行以下哪個(gè)命令時(shí),能看到數(shù)據(jù)庫軟件版本號(hào)()

A.sqlplus/nolog;
B.connectsys/password@tomc_192.168.1.1assysdba;
C.shut down;
D.drop user WOMC21cascade;


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