Objective:To investigate the effect of zinc and selenium on serum blood urea nitrogen(BUN) and the alanine aminotransferase(ALT) activity in serum of rats.

• 目的:探讨锌、硒对大鼠血清中血尿素氮(BUN)含量和丙氨酸氨基转移酶(ALT)活性的影响。