A.1.74%B.2.74%C.3.74%D.4.74%
A.與溫度無關,與雜質(zhì)濃度無關 B.與溫度有關,與雜質(zhì)濃度有關 C.與溫度無關,與雜質(zhì)濃度有關 D.與溫度有關,與雜質(zhì)濃度無關