Study of IBI354 Versus Investigator's Choice of Chemotherapy in Patients With Platinum-resistant Ovarian, Primary Peritoneal, or Fallopian Tube Cancer

intravenous infusion of 12 mg/kg on Day 1 of each 3-week treatment cycle

paclitaxel：- Usage and dosage: 80 mg/m2 administered as an intravenous infusion on Day 1 of each weekly treatment cycle。 Gemcitabine：Usage and dosage: intravenous infusion at 1000 mg/m2 on Days 1, 8 of each 3-week treatment cycle。 Liposomal doxorubicin：Usage and dosage: intravenous infusion of 40 mg/m2 on Day 1 of each 4-week treatment cycle