When an organism is completely encapsulated and preserved, it becomes a fossil, therefore turning into evidence of things that once lived.

A．thereby

B．as a result of

C．so

D．in the end

按年度计算的变动率用来反映通货膨胀（或紧缩）程度的指标是（）

A.居民消费价格指数

B.商品零售价格指数

C.农业生产资料价格指数

D.工业品价格指数