2. 外语
  3. To study the distribution of disease within an area, it is useful to plot the cases on the map.

To study the distribution of disease within an area, it is useful to plot the cases on the map.

admin2020-06-16  20
问题 To study the distribution of disease within an area, it is useful to plot the cases on the map.
选项 A、mark
B、allocate
C、erase
D、pose
答案A
解析
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