Have you ever listened to the song Yesterday once more, _____ singer died in her early years? [ ]

A. its

B. it's

C. whose

D. which

图像未发现扫描层面外病灶，原因是（）

A.密度分辨率高

B.空间分辨率高

C.无层面外结构干扰

D.灰阶范围小

E.矩阵大