选项
A.
A.Chemical energy turns into elastic energy and kinetic energy化学能变为弹性能+动能
B.
B.Kinetic energy turns into chemical energy and elastic energy动能变为化学能+弹性能
C.
C.Elastic energy changed in to chemical energy and kinetic energy弹性能变为化学能+动能
D.
D.Chemical energy turns into elastic energy and then turns in to kinetic energy化学能变为弹性能再变为动能
正确答案：