下列哪项与肺顺应性降低与无关（）
A.肺血管受压，肺血流减少
B.深吸气
C.表面活性物减少
D.肺不张
E.肺纤维化
参考答案：B
A: I am so nervous. I am afraid I might forget what to say!
B: _______
A．Stop daydreaming!
B．Keep calm!
C．You are so funny!
D．What a good idea!
简述加氧压铸的原理及特点
