In 1742 he suffered a fatal attack of smallpox.1742年,他染上了致命的天花.He gave money to the World Health Organisation to help defeat smallpox.他向世界卫生组织提供资金以帮助消灭天花。He gave money to the World Health Organisation to help defeat smal...
One , restricted those who contract is emulative, influence collective contracts duly income.限制了承包的竞争性, 影响集体应有的承包收入.Finally, the feasibility of the model is tested through the emulative result and a successful case.仿真结果和...