【单选题】
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
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根据网考网移动考试中心的统计,该试题:
2%的考友选择了A选项
31%的考友选择了B选项
5%的考友选择了C选项
62%的考友选择了D选项