蛋白S（PS）在肝脏合成时，需依赖下列哪一物质（）

A.蛋白C

B.维生素K

C.血栓调节蛋白

D.蛋白Z

E.肝素辅助因子

Comparative Historical Linguistics believed that all languages originated from one language and were ruled by a common ______.