填空题

Researches in the wild field evaluating the two most common Bt corn plants showed that the toxin absorbed was too ______ .

【参考答案】

low

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热门试题

填空题

It is much more difficult to ______ than to calculate the benefits of the GM crops.

填空题

Among all the GM crops, Bt genes have proved most effective in ______ when the largest reduction in pesticide use has been reported.