单选题Hall―Pectch公式是（）Aσs=σ0+kd-1/2Bσs=σ0+kd-1/3-1/5Cσs=σ0+kd
单选题
Hall―Pectch公式是（）
A
σs=σ0+kd-1/2
B
σs=σ0+kd-1/3-1/5
C
σs=σ0+kd
参考解析
解析：
暂无解析
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