单双出现的概率是多少

简介：There was another scene in the alley, with piles of garbage and sewage flowing across the street. The writings on the walls were so smoked that they were almost invisible. Huang Yinyu went straight to a very old building with trembling wooden stairs. On the wall of the building next door in the distance, there is also the word "HAIL" in capital letters, painted with red paint, which is very conspicuous.