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【多选题】
下列哪些杀虫剂主要由体壁进入昆虫体内?
A.
熏蒸剂
B.
触杀剂
C.
胃毒剂
D.
内吸剂
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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】.在单位时间里，当壁面与流体主体的温差为1K时，每1m固体壁面与流体之间所传递的热量是（）的物理意义
A.
R
B.
α
C.
λ
D.
k
相关题目：
【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】.在单位时间里，当壁面与流体主体的温差为1K时，每1m固体壁面与流体之间所传递的热量是（）的物理意义
A.
R
B.
α
C.
λ
D.
k
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