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【多选题】
DC/DC变换器又称为降压斩波电路,主要( )组成A.
主电路
B.
控制电路
C.
驱动电路
D.
保护电路
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皮皮学刷刷变学霸
举一反三
【单选题】In the earliest stage of embryogenesis, the hematopoietic stem cells arise from the blood islands of:
A.
liver
B.
yolk sac
C.
bone marrow
D.
spleen
E.
amnion
【简答题】教材 P31 第 1-1 。
【多选题】A hematopoietic stem cell is defined as
A.
a cell with extensive self-renewal and proliferative potential
B.
a cell only to produce daughter cells with identical characteristics
C.
a cell with the capacity to differentiate into the progenitors of all the blood cell lineages
D.
a cell With the capacity to produce some hematopoietic growth factors such as SCF，GM-CSFs，et．a1．
E.
a cell with the capacity to express some specific surface antigens such as CD34
【单选题】Hematopoietic stem cell transplantation can be used to treat leukemia because stem cells have the greatest potential of _____.
A.
differentiation
B.
division
C.
reproduction
D.
growing
【单选题】Which of the following stem cells have the potential to develop into a complete individual?
A.
Mesenchymal stem cells
B.
Neuronal stem cells
C.
Embryonic stem cells
D.
Hematopoietic stem cells
【单选题】the hematopoietic stem cell originate from:
A.
neural crest
B.
somatopleure
C.
neural tube
D.
mesoderm
E.
york sak
【单选题】Hematopoietic stem cells are
A.
Totipotent
B.
Pluripotent
C.
Multipotent
D.
Unipotent
E.
Terminal differentiated
【简答题】P31,1/3/6
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