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A．Collect ash tree seeds for experiment.B．Preserve the healthy ash tree seeds.C．Set up

．Collect ash tree seeds for experiment.
B、Preserve the healthy ash tree seeds.
C、Set up a new seed bank for research.
D、Develop a new breed of ash tree.

发布时间：2025-02-01 15:40:27

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答案：B
短文说，实验室对种子进行检查和照X-ray，确保没有钻孔虫的受精卵，只有最好的被保存起来。故答案是B。

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