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【单选题】

对人畜毒性最大的中药杀虫剂是()。

A.
磷化铝
B.
硫黄
C.
氯化苦
D.
环氧乙烷
E.
挥发油熏蒸技术
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举一反三

【单选题】除哪项外均无毒性

A.
雄黄
B.
芒硝
C.
浮海石
D.
滑石
E.
炉甘石

【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】毒性最强的局麻药是()

A.
普鲁卡因
B.
卡波卡因
C.
利多卡因
D.
丁卡因
E.
布比卡因

【单选题】药物对动物急性毒性的关系是

A.
LD50越大,毒性越大。
B.
LD50越大,毒性越小。
C.
LD50越小,毒性越小。
D.
LD50越小,越容易发生过敏反应。

【单选题】乙型病毒性肝炎采取的是

A.
严密隔离
B.
呼吸道隔离
C.
消化道隔离
D.
抗酸杆菌隔离
E.
血液-体液隔离