【名词&注释】
急性淋巴细胞白血病(acute lymphoblastic leukemia)、慢性淋巴细胞白血病(chronic lymphocytic leukemia)、研究结果(results)、幼淋巴细胞白血病(prolymphocytic leukenia)、浆细胞白血病(plasma cell leukemia)、分化抗原(differentiation antigen)、核染色质(nuclear chromatin)、卵圆形(ovoid in shape)、颗粒状(granular)
[单选题] Which is the major regulator of proliferation and differentiation of megakaryocytes
  A.  erythropoietin     
  B. colony stimulating factors 
  C.  .granulocyte colony-stimulating factor  
  D. interferon 
  E. thrombopoietin  
 
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