下列哪项不属于面颅骨()
A.额骨
B.眶骨
C.鼻骨
D.上颌骨
E.下颌骨
参考答案:E
I’m expecting a digital camera for long, but dad has no time to buy ______ for me.
A.it
B.one
C.this
D.that
简述多级存储体系结构的原理。