The necklace that she lost is very expensive. It's of great _____. [ ]

A. valuable

B. value

C. valueless

D. invaluable

踝关节正位中心线经内外踝连线上多少垂直射入暗盒中心（）。

A、3cm

B、4cm

C、1cm

D、2cm

E、都不是