________ used to be China's hard currency in ancient times.
A: Copper
B: Bronze
C: Gold
D: Silver
A: Copper
B: Bronze
C: Gold
D: Silver
举一反三
- In ancient times, Bronze inscriptions were often used for_________. A: recording historical events B: recording important moments C: decoration D: creating a new writing style
- For Swiss currency, the 5-centime coin is in gold color while all other coins are in silver color.
- The old Silk Road _____ China with the West in ancient times.
- 上善若水（as good as water）was used to praise the sage in ancient times.
- Which metal takes the place of platinum of inoculation loop used in lab A: copper B: ron C: nicke D: Silver E: minium