Plants will emit an increased amount of heat when they are ______. Infrared scanning technology may be brought back into operat

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问题 Plants will emit an increased amount of heat when they are ______.
Infrared scanning technology may be brought back into operation because of ______.

选项 A、the desire of farmers to improve the quality of their produce
B、growing concern about the excessive use of pesticides on crops
C、the forceful promotion by the Department of Agriculture
D、full support from agricultural experts

答案B

解析 依据文章第三段第二行。
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