The earlist use of geothermal energy can be traced back to ( ).
the Paleolithic Age
举一反三
- The tradition of setting off fireworks can be traced back to ____
- The history of British pubs can be traced back to Roman taverns.
- In China, debate can be traced back as early as the ______ and the Warring States Period
- Diaolou of the Qiangs has a long history, which can be traced back to the _____ Dynasty.
- The origins of modern public speaking can be traced back to ancient Greece and Rome. ( )
内容
- 0
Which year can the celebration of the International Labor Day in China be traced back to ?
- 1
Solar panels, wind turbines, hydro power and geothermal energy and hydrocarbons (natural gas or coal) can all be used to produce hydrogen (a primary energy).
- 2
The ________ (古老的) tradition of guessing the Lantern Riddles can be traced back to the Song Dynasty.
- 3
The Mid-Autumn Festival has had a long history, which can be traced back to Song Dynasty.
- 4
Geothermal energy brings air emissions including（ ）.