Useful drugs are made from inorganic substances or are plant and animal by-products.

admin2013-12-06 47

问题 Useful drugs are made from inorganic substances or are plant and animal by-products.

选项 A、materials
B、derivatives
C、chemicals
D、ingredients

答案B

解析 by-product副产品，派生。

转载请注明原文地址:https://kaotiyun.com/show/nyU3777K

医学博士外语

相关试题推荐

随机试题

最新回复(0)