摘要The surface of the Earth consists of several pieces,big or small,just like a jigsaw.Is the Earth under your feet sleeping all the time?No.Sometimes it moves.The continuous activities happening in the crust give rise to a series of quakes.
6XIE JIAO, KONG RENYUAN & ZHANG ZIYANG reporters of China News Service, a reporter of Xin-hua News Agency..Back to School,Back on Their Feet[J].China Today,2011,60(6):20-21.
