肺内压的变化是
A．吸气末等于呼气末B．吸气时大于呼气时C．吸气末大于呼气末D．吸气时等于呼气末E．吸气时等于呼气时
参考答案：A
—_____ were you born?
—On May l, 1996, in Wuhan. [ ]
A. When
B. Where
C. When and where
D. When and which
什么是静压、动压、表压和总压？
