血氧饱和度监测目的是监测机体（）状况。
参考答案：组织缺氧
He never wrote ________ his first one again.
A．as good book as
B．such good a book as
C．so good a book as
D．such good book as
母线开始弯曲处距最近绝缘子的母线支持夹边缘应不大于( )L，且不得小于( )mm。
A．0.15 50B．0.25 40C．0.25 50D．0.35 60
