Figure 10.

Cross sections as functions of the center-of-mass energy for: a e⁺e⁻ → e⁺e⁻ with $|\cos {\theta }_{e^{-}}|<0.7$; b e⁺e⁻ → μ⁺μ⁻; c e⁺e⁻ → τ⁺τ⁻; d e⁺e⁻ → hadrons. The solid lines are the combined fit results. The open and solid points show the 1989 and 1990 data respectively.