α1抗胰蛋白酶缺乏，常导致下述哪个肺气肿
A．腺泡周围型B．全腺泡型C．腺泡中央型D．不规则型
参考答案：B
Was it near the white building, if I may ask, ____ Martin Luther King gave a speech "I have a dream"?[ ]
A. where
B. that
C. why
D. in which
下述哪些是肺癌的诊断线索（）
A.男性，40岁以上，有长期吸烟史
B.咳嗽治疗无效或痰中带血
C.反复同一部位的肺炎
D.肺内肿块影
E.体重短期内下降明显
