影响水产动物药物作用的因素有哪些？
参考答案：影响药物作用的因素
1.药物方面的因素
（1）剂量
（2）剂型
（3）给药方案
（4）联合用药及药物相互作用
临床上同时使用两种以上的药物治疗疾病，称为联合用药。
协同作用：两药联合应用的效应大于单药效应的代数和。
相加作用：两药合用的效应等于它们分别作用的代数和。
拮抗作用：两药合用的效应小于它们分别作用的总和。
2.动物方面的因素
（1）种属差异
（2）生理因素
（3）病理状态
（4）个体差异
3.饲养管理和环境因素
水温、PH值和有机物等
| 阅读理解。 | |||||||||||||||||||||||||||
| As we know, some children live in the countryside, and some live in the city. Their lives are a little different, but they also have many of the same dreams.
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| 1. The survey was done among the ________ between the countryside and the city. | |||||||||||||||||||||||||||
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| A. parents B. students C. teachers D. drivers | |||||||||||||||||||||||||||
| 2. The children in the city usually do ________ according to the survey. | |||||||||||||||||||||||||||
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| A. cooking B. cleaning C. washing D. no housework | |||||||||||||||||||||||||||
| 3. About ________ of children in the countryside have good eyesight, while ________ of children in the city have good eyesight. | |||||||||||||||||||||||||||
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A. 55%; 25% | |||||||||||||||||||||||||||
| 4. Which is NOT mentioned in the survey? | |||||||||||||||||||||||||||
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| A. Homework. B. Subjects. C. Dream jobs. D. After-class activities. | |||||||||||||||||||||||||||
| 5. Which of the following is RIGHT according to the survey? | |||||||||||||||||||||||||||
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| A. A classroom in the countryside often has TV sets. B. Children in the countryside often join the school clubs. C. Children in the city often have much homework to do. D. Children in the city often have big families. |