—I bought the digital camera two months ago.

—You mean that you __________ it for two months. [ ]

A. have had

B. have been

C. have bought

D. have taken

乳突摄影的叙述，错误的是（）

A.许氏位--25°角侧位

B.梅氏位--双45°角位

C.许氏位显示颅后窝

D.许氏位显示双侧乳突侧位像

E.梅氏位显示双侧乳突轴位像