不是硬膜外血肿特点的是（）。
A.呈梭形
B.内缘光滑锐利
C.常有骨折
D.中线结构移位较轻
E.可越过颅缝
参考答案：E
已知a-b=3，ab=-1，求a2b-ab2的值．______
We will visit Europe next year ______ we ________ the money.
A．provided; will have
B．provided; should have
C．provided that; have
D．providing that; will have
