下列各项中，最易伤肺的邪气是（）。
A.湿邪
B.风邪
C.燥邪
D.暑邪
E.寒邪
参考答案：C
20. —Why was __ you lost all your keys？
—It was because of my carelessness.
A．that
B．what
C．it that
D．One
什么是灵敏度？
