四则混合运算是指

简介：Although it was a false position, he had taken this position after all. When this position was vacant, Chen Yan and Xie Sheng naturally had to take his place. Chen Yan was just the Minister of Hubu. Xie Sheng's Minister of Staff was in charge of the promotion of officials. He had very heavy powers and was watched by both the government and the public. Therefore, the Minister of Staff quickly decided on the candidate, Zheng Sanjun.