胸膜腔内压的负值大小取决于()
A.肺内压与胸膜腔内压之差
B.肺内压与大气压之差
C.肺回缩力
D.呼吸肌的舒缩
E.大气压与肺回缩力之差
参考答案:E
A: May I have ______ slice of bread with butter, I'm not full.
B: Certainly. Here you are. [ ]
A. other
B. the other
C. another
D. the others
发射光谱
A.紫外分光光度法B.红外分光光度法C.直接电位法D.X-衍射光谱E.荧光光谱