人教版高一英语必修三unit 4 astronomy speaking and writing课件（23张）.pptx
课件23张PPT。Unit 4Unit 4
Astronomy:
the science of the starsSpeaking and Writing1. To discuss what you need if you travel to the moon
2. To write a short article to show your problems and the way to overcome themLife is different on a spaceship. There is very little gravity so that things float aroun...