The old ____well looked after by the government in China.
A.is
B.are
C.has been
D.was
答案:B
常见的诱导剂中不包括()
A.苯巴比妥
B.苯并A.芘
C.DDT
D.3-甲基胆蒽
E.氯化物
属于支气管扩张特异性的临床表现为()
A.心慌、气短、咳粉红色泡沫痰
B.慢性咳嗽,咳白色黏痰,痰中带血
C.慢性咳嗽,咳白色泡沫痰
D.X线胸片显示左下肺纹理紊乱,多个不规则环状透光区伴卷发状阴影
E.多于中年后发病