SANTA MONICA, Calif. — Bill Cosby will again be facing sex abuse allegations Wednesday as attorneys give opening statements in a civil trial that’s one of the last remaining legal claims against the comedian. Lawyers for 64-year-old Judy Huth will outline the evidence they plan to present that Cosby forced her to perform a sex act at the Playboy Mansion in 1975 when she was 16 years old. The case will hinge on the testimony of Huth, bolstered by photos and other archival exhibits to place the incident in time.