吸痰前后，需要观察患者的氧合，重点观察内容是：（）
A．双肺呼吸音
B．纯氧吸入
C．血氧饱和度变化
D．吸痰管的大小
E．患者的神志
参考答案：C
The earthquake striking Japan in March was extremely powerful, even _____ the shape change of the country's
coastline. [ ]
A. resulted in
B. resulting in
C. resulting from
D. resulted from
IP电话采用的关键技术主要有哪些？
