第29题: [单项选择]In his researches on ______ diseases, he discovered many facts about the lungs of animals and human beings. A. inherited B. chronic C. infectious D. pulmonary 参考答案:D 答案解析:(pulmonary肺的)。句意为:在研究肺病的过程中,他发现许多有关人和动物肺部的事实。A.inherited遗传的;D.chronic慢性的;C.infectious传染性的。