Jacob is not thrilled about having to share his birthday with pi. But in this playful picture book celebrating the magical number, a tasty Pi Day surprise shows him that, any way you slice it, pi makes the best birthday cake!Today is March 14th, Jacob’s birthday!!But no one seems to remember that it's his special day. "Happy... Pi Day!" his friends greet him.All through the day of pi-filled activities at school--from singing the pi song, to measurin...

This book focuses on the geological characteristics and genesis of several base metal deposits in the northern margin of the North China Plate, namely the Bainaimiao Cu-Au-Mo, the Huogeqi Cu-Pb-Zn, the Dongshengmiao Zn-Pb-Cu and the Jiashengpan Zn-Pb deposits. These deposits have geological and geochemical affinities with orogenic-type deposits, such as shear zone-controlled mineralization and carbon-rich low-salinitiy ore-forming fluids, and are characterized by multistage ore-forming his...