上颌神经经哪儿出颅
A．卵圆孔B．圆孔C．眶下裂D．棘孔E．茎乳孔
参考答案：B
You can't imagine what difficulty we had _____ home in the snowstorm. [ ]
A. walked
B. walk
C. to walk
D. walking
呼叫接通率的的计算方法为（）
A、成功的呼叫次数/呼叫总次数
B、成功的呼叫总次数/失败的呼叫次数
C、失败的呼叫次数/呼叫总次数
