A-A+
Useful drugs are made from inorganic substance
问题详情
Useful drugs are made from inorganic substances or are plant and animal by-products.
A．materials
B．derivatives
C．chemicals
D．ingredients请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：名词辨析A．materials原料，材料，物资，素材，布料；B．derivatives派生的事物，派生词；C．chemicals化学制品，化学药品；D．ingredients成分，因素；而by—products表示：副产品；因此B为答案。
