Mechanism of polypeptide from scorpion venom increasing inhibition of 5-fluorouacil on H22 hepatoma Inhibitory mechanism of polypeptide from scorpion venom combined with 5-fluorouacil on angiogenesis of H22 hepatoma Research on inhibition mechanism of polypeptide extract from scorpion venom combined with Rapamycin on angiogenesis of H22 hepatoma