填空题

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

【参考答案】

define the environrmental risks
<上一题 目录 下一题>
热门 试题

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.
填空题
The plants would be insect resistant as a gene from the soil bacterium could direct cells to produce ______ that is toxic to certain insects.
相关试题