What do the surfaces of the deserts look likeMany of them have surfaces of （）
举一反三
- 1) What are primary flight control surfaces and what are the secondary control surfaces? (5分） 2) What are their postions? 3) What are their functions?
- What do people in deserts haveThey have herds of （）and sheep.
- Generally the function of lubrication is to form of a film of lubricant between any two surfaces that have relative （）， so that surfaces dont get touch with each other.
- 修复划伤的表面。 A: Repair the surfaces that have scratches. B: Repair scratched surfaces.
- What do we learn about deserts from this text A: Deserts can change into green and fertile areas. B: Certain areas have always been desert. C: Deserts were once the home of elephants and giraffes. D: Deserts have been growing since the beginning of the worl