name two types of force that the opposes motion

name two types of force that the opposes motion 英语翻译There is some evidence that the two types of sleep ,drea The change of motion is proportional to the applied force an 英语翻译Psychologists think that there are two types of emotion: 英语翻译We distinguish two types of uncertainty that firms face （Two basic types of carbohydrate,the simple carb,） identifie there are two types of people in the world 翻译 There's only two types of people in the world Motion of the debate Scientists have ____ that motion is the source of life 1.what is the last day of the week?2.name two months that ha 1；name the two chemical elements that make up of Earth's atm