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  3. The passage summarizes harmful effects of animal experiment. However, as animal experiment is indispensable in a number of areas

The passage summarizes harmful effects of animal experiment. However, as animal experiment is indispensable in a number of areas

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问题 The passage summarizes harmful effects of animal experiment. However, as animal experiment is indispensable in a number of areas, it might not be stopped or replaced by other alternatives.
In basic scientific research, the object is to understand how, say, the brain works rather than to develop a drug to ______ brain disease.
选项
答案treat
解析 根据题目定位信息在第四部分第一句话。
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大学英语四级

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