急性枕大孔疝时,最有效的抢救措施是
A.快速静脉点滴高渗性脱水剂
B.紧急颅后窝开颅术
C.额角钻孔脑室外引流术
D.脑脊液分流术
E.静脉注射速尿
参考答案:C
---How does your English teacher help you to practice English?
--- By encouraging us to __________ some dialogues with our partner in class.
A.make up
B.take up
C.look up
D.turn up
什么叫循环的热效率?它说明什么问题?