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Useful drugs are made from inorganic substances or plant and animal by-products.
Useful drugs are made from inorganic substances or plant and animal by-products.
游客
2025-01-28
39
管理
问题
Useful drugs are made from inorganic substances or plant and animal
by-products
.
选项
A、materials
B、derivatives
C、chemicals
D、ingredients
答案
B
解析
此处的by-product意为“副产品”,derivative意为“派生的事物”,可以引申为“派生产品,衍生产品”,符合题意,所以选B;material(材料);chemical(化学制品,化学药品);ingredient(组成成分,要素)。
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