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W18Cr4V的典型铸态组织是?

W18Cr4V的典型铸态组织是?
A.鱼骨状莱氏体+M+AR+K
B.F+P+K+鱼骨状莱氏体
C.A+鱼骨状莱氏体+K
D.FeC3+鱼骨状莱氏体+F
正确答案:A