对此病人如处理不当容易引起
A．面部蜂窝织炎
B．海绵状静脉窦炎
C．脑脓肿
D．化脓性脑膜炎
E．败血症
参考答案：B
蜗杆与蜗轮啮合时呈线接触，故承载能力不大。( )
The old photo called up my memory of the small forest during my childhood, through which
________a clear stream.
A．floated
B．flowed
C．flooded
D．flew
