logo
Loading...

為什麼直升機頂上有大螺旋槳尾巴有一個小螺旋槳? Why does a helicopter have a large rotor on top and a small rotor on its tail?

logo

十萬個為什麼

Read the original at podcasters.spotify.com

Keep up with this source

Keep this source in your dashboard and return to its latest articles. Email alerts are managed separately in Settings.

FetchFeeds groups articles by feed so you can follow sources, compare coverage, and save stories for later.

Back to all articles from 十萬個為什麼

More from this feed

Choose another story from 十萬個為什麼.