Li Ming is talking _____ his cousin. [ ]
A. to
B. at
C. of
答案:A
2,3,13,175,( )
A.30625 B.30651 C.30759 D.30952
公安工作对象的隐蔽性和公开性,决定了公安工作的隐蔽性和公开性。( )