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单项选择题
The segregation coefficient of phosphor is 0.35. The resistivity of a CZ Si boule doped by the liquid phase direct doping method
The segregation coefficient of phosphor is 0.35. The resistivity of a CZ Si boule doped by the liquid phase direct doping method
A、is axially uniform.
B、is decreasing radially.
C、is increasing axially from head to tail.
D、is decreasing axially from head to tail.
