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【判断题】

害虫防治中片面依赖化学杀虫剂而出现的3R问题,即抗性、残毒、再猖撅。

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】在下到关于函数依赖的叙述中,不正确的是( )。

A.
若A→B,A→C.则A→BC
B.
若A→C,则AB→C
C.
若A→B,DB→C.则DA→C
D.
若AB→C,则A→C,B→C

【单选题】害虫防治的发展方向是()

A.
植物检疫
B.
农业防治
C.
物理防治
D.
生物防治

【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food.Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...

A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.