单项选择题
A.X1008~S1012 B.X1008~S1010 C.X1006~S1010 D.X1006~S1012
A.S1012~Xr B.Szr~S1014 C.Xc~S1010 D.Xr~S1004
A.Xc~S1010 B.Szr~S1014 C.Xc~S1002 D.S1012~Xr
A.S1012~Xr B.Xc~S1010 C.Szc~S1004 D.Szc~S1014
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