单项选择题
A.<5% B.>10% C.>5% D.<10%
A.1Cr18Ni9Ti B.0Cr18Ni9 C.Cr18Ni11Nb D.1Cr17Ni7
A.0Cr18Ni9 B.1Cr18Ni9Ti C.1Cr17Ni7 D.Cr18Ni11Nb