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【单选题】
南瓜田四周种植 Blue Hubbard 品种的南瓜,诱集南瓜上的瓜条叶甲 达到了 94% ,主栽南瓜的受害率仅为 1% ,减少杀虫剂投入 93% ,南瓜产量显著增加,净收益 100m2 最高可达 1100 美元。 请问这应该属于哪种防治措施?
A.
农业防治
B.
物理防治
C.
生物防治
D.
植物检疫
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【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.
【单选题】张某用1000万元购买了一间商铺用于出租经营,其要求的投资收益率为10％，经营期为20年，如果每年经营净收益相等，则该投资者的年投资回报为（ ）万元。
A.
17．46
B.
100．00
C.
117．46
D.
672．75
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【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.
【单选题】张某用1000万元购买了一间商铺用于出租经营,其要求的投资收益率为10％，经营期为20年，如果每年经营净收益相等，则该投资者的年投资回报为（ ）万元。
A.
17．46
B.
100．00
C.
117．46
D.
672．75
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