题目

There are no exact differences between physics and other natural sciences because all sciences overlap(重叠）.In general,however,physics is the scientific study of forces and qualities such as heat,light,sound,pressure,gravity and electricity,and the ways they affect other objects. One major branch of physics deals with the states of matter—solids,liquids and gases and with their motions.The pioneer achievements of Galileo,Kepler and Newton dealt with solid masses of matter in motion.Such studies deal with forces acting on moving objects.It is the subject of mechanics and belongs to the b选一选。那 哪①我的橡皮不知道放儿了。②里，是同学们经常去玩的地方。