1，对肺泡气分压变化起缓冲作用的肺容量是
A．补吸气量
B．潮气量
C．补呼气量
D．功能残气量
参考答案：D
138. Have you heard of it? Firefighters rushed into a burning house, three of them unfortunately _____ in and ______ their lives.
A．caught; losing
B．catching; lost
C．caught; lost
D．catching; losing
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