问题描述：
American apparel products and farm products have historically received more protection___foreign competition because of high tariffs on related impores.
空格处填个介词,请英语高手帮忙,from 对吗?谢谢了
空格处填个介词,请英语高手帮忙,from 对吗?谢谢了
问题解答：
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