后巩膜破裂伤指征有( )
A．视力严重下降
B．显著的低眼压
C．广泛的结膜下出血
D．严重的前房积血或玻璃体积血
E．以上都是
参考答案：E
So ________ that all the living things are dying out gradually. [ ]
A. serious polluted the lake is
B. serious polluted is the lake
C. seriously polluted is the lake
D. seriously polluted the lake is
接通电源前，操作系统的调压器接上后，直接通电源，合闸，开始升压。（）
