2. 外语
  3. By conducting experiments on brave volunteers, Walter Reed was able to identify the particular kind of mosquito that carried yel

By conducting experiments on brave volunteers, Walter Reed was able to identify the particular kind of mosquito that carried yel

admin2012-07-29  50
问题 By conducting experiments on brave volunteers, Walter Reed was able to identify the particular kind of mosquito that carried yellow fever.
选项 A、thin
B、hearty
C、curious
D、courageous
答案D
解析 勇敢的
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