A、Trees can protect crops from wind. B、Crops growing on trees help feed people. C、Crops and trees cannot grow in one field. D、Tr

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问题

选项 A、Trees can protect crops from wind.
B、Crops growing on trees help feed people.
C、Crops and trees cannot grow in one field.
D、Trees do harm to crops’ growth in some way.

答案B

解析
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