单项选择题
A.点 B.线串 C.多边形 D.多重多边形
A.dba_data_files B.dba_objects C.dba_tablespaces D.dba_free_space
A.action.json B.action.xml C.gistheme.json D.config.xml
A.MRS B.MRO C.MRE D.CDR
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