有关上颌隆突的描述，不正确的是

A．为一骨质隆起

B．位于硬腭中央部

C．位于上颌硬区后部

D．位于上颌硬区前部

E．与义齿基托的制作有关

—Do you know       ?

—At the end of July.

A．how soon is your sister coming back home

B．how often Nancy hears from her pen friend

C．when the meeting will be held

D．when will the new computer game come out