Why was gunpowder invented in the Song Dynasty? ( )
A、Gunpowderwasinventedbyasoldiertodefendthecountry.
B、Gunpowderwasinventedbyanalchemistfortheelixiroflife.
C、Gunpowderwasinventedbyordinarypeopleforfun.
D、Gunpowderwasinventedbyadoctorformedicine.
发布时间：2025-11-01 20:22:29
