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单项选择题MEDLINE中,自由词方式检索“白血病(1eukemia)的诊断和治疗”的文献,可输入检索式 ()

A、Leukemia and(diagnosis or therapy)

B、Leukemia and diagnosis or therapy

C、Leukemia and diagnosis and therapy

D、Leukemia or diagnosis or therapy

  • A
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