Only after Mary read her essay the second time            the spelling mistake.

A．did she notice.

B．she notice.

C．does she notice

D．she has noticed

“T”形或“Y”形嵌压骨折线见于（）

A．椎体骨折 

B．颅骨骨折 

C．跟骨骨折 

D．髌骨骨折 

E．骨端关节内松质骨骨折