四则混合运算是哪四则

简介：Xiao Xiaobai then stood up and returned to the sofa to sit down and said: In addition, if you want to better control your power, you must engage in more actual combat. You can try to spar with Black Snake and Sister Li, but you must be careful about how you use your inner energy. Because your inner Qi is transformed from Xuanshao's demonic Qi, it is different and has terrifying lethality.