Common causes of emphysema does NOT include _____
A. exposure to cigarette smoke
B. exposure to industrial smoke
C. chronic infection
D. lack of oxygen
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Simple chronic bronchitis is a syndrome characterized primarily by ______
A. a chronic productive cough
B. an enlarged alveolus
C. edematous pulmonary vein
D. obstructive bronchial tube
Which one of the diseases is also called “small airways disease"?
A. asthma
B. bronchospasm
C. chronic obstructive bronchitis
D. respiratory distress syndrome
Recurrent episodes of symptomatic bronchospasm are called____
A. pleurisy
B. asthma
C. pneumothorax
D. asthmatic bronchitis
1.1997年,苏格兰一组科学家的克隆实验使多利羊得以诞生。自那时以来,有关克隆人的激烈争论一直进行着。Dolly the sheep_____1_____acloningexperiment by a group of Scottish scientists in 1997. A fierce debate on human_____2_____has ever since been going on.contentiousclonepotentialresult fromin placeprocedureinvolveoppose totherapeuticreproductive