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微信扫一扫The HG regresses after the nursing stage of worker bees but it still remains active（Costa and Cruz-Landim，2000；Huang et al.，1989）．Invertase and glucose oxidase are also produced（Takenaka et al.，1990；Ohashi et al.，1996，1999；Santos et al.，2005）．Glucose oxidase is needed to convert glucose to gluconic
