2. 外语
  3. You can tell from the yellow streaks on the leaves that the plant has been infected.

You can tell from the yellow streaks on the leaves that the plant has been infected.

admin2009-06-15  113
问题 You can tell from the yellow streaks on the leaves that the plant has been infected.
选项 A、signs
B、marks
C、layers
D、spots
答案B
解析
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