Some of the earliest mechanical devices were designed to raise water from streams for the irrigate of crops.()
A: earliest mechanical
B: were designed
C: raise
D: irrigate
A: earliest mechanical
B: were designed
C: raise
D: irrigate
举一反三
- 中国大学MOOC: Who were some of the earliest Confucians?
- Mud from the bottom of the pond can be used to ________ the crops. A: sow B: irrigate C: fertilize D: weed
- who were the earliest invaders in England?
- The earliest kites were made of_______.
- As its name suggests, a space elevator is designed to raise things into space.