:2019人教版高考英语一轮复习必修41Unit1知能演练（有答案）

 
Ⅰ 阅读理解
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(2018•吉林长春七校高三第一次联考)Joseph Goldberger was a doctor for the United States Public Health Service and he was an advocate for scientific and social recognition of the links between poverty and disease. In 1914, Goldberger was asked by U．S. Surgeon General Rupert Blue to study a skin disease that was killing thousands of people in the South. The disease was pellagra(糙皮病)．
Goldberger traveled to the state of Mississippi where many people suffered from pellagra. He studied the victims and their families. Most of the people lived a hard life. The  doctor came to believe that the disease didn’t pass on from one to another, but was instead related to food. He received permission from the state governor to test this idea at a prison. Prisoners were offered pardons if they took part. One group of prisoners received their usual foods, mostly corn products. A second group ate meat, fresh vegetables and drank milk. Members of the first group developed pellagra.