【正确答案】
D
【答案解析】[解析] 19-20
For every man in the Civil War who died in battle, 2 or 3 men died of disease. Doctors of that time knew very little about causes of sickness or ways of preventing it. Thousands of men in poor health became soldiers. Hundreds of others were victims of the diseases that went through the camps because the soldiers had not had them in their childhood.
Army life was hard. Soldiers got few fruits or Vegetables. There was no milk unless they happened to find a cow. Neither their clothes nor their shelters protected the troops from rain, snow, and cold. Sickness and disease were spread by rats and dirty drinking water.
Gunshot wounds were serious, as in any war, hut they did not cause as much death and suffering as disease did.
19. According to the passage which of the following was the chief killer in the Civil War?