层进式倍投

简介：With doubts in his heart, he followed the black cat and turned two lanes. At the entrance of the second lane, Xiao Xiaobai saw a hospital's 120 ambulance parked in the lane not far away. The door of a house opened, and several people saw it. Doctors and nurses hurriedly carried a stretcher into the ambulance. Behind them, there was a middle-aged man in a black suit with an anxious look on his face.