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轴向峰因子 axial peaking factor
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下列哪种体液因子对造血起到抑制作用A、类胰岛素生长因子（insulin－like growth factor，IGF）B、干扰素α（interferon－α）C、集落刺激因子（colony stimulating factor，CSF）D、血小板生成素（thrombopoietin，TPO）E、干细胞因子（SCF）
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下列哪种体液因子对造血起到抑制作用A.干细胞因子(SCF)B.干扰素a(interferon-α)C.集落刺激因子(colony stimlulating factor，CSF)D.类胰岛素生长因子(insulin-like growth factor，IGF)E.血小板生成素(thrombopoietin，TPO)
考题
单选题A variable displacement system of hydraulic drives consists of （）.A
a variable displacement axial piston pumpB
a constant displacement axial piston pumpC
a reciprocating piston pumpD
a centrifugal pump
考题
单选题EffiCieNCy fACtoR：对于分组交换业务为有效因子，代表数据有效因子，可理解（）A
EffiCieNCy fACtoR=1-误码率B
激活因子C
传输效率因子D
其他
考题
单选题An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.A
radially from the shaftB
parallel to each other and to the shaftC
parallel to each other but at a right angle to the shaftD
at an angle to each other and to the shaft
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