在慢性支气管炎导致肺气肿过程中最早出现的是
A.细支气管腔不全阻塞B.肺泡残气增多C.肺泡壁弹性减弱或破坏D.二氧化碳分压增高E.血液pH值相应性改变
参考答案:A
Born into a family with three brothers, David was to value the sense of
sharing.
A.brought up
B.built up
C.picked out
D.put forward
FoxBASE+“XYZZ”$“XYZF”的结果为.T.。