单项选择题
A.≥3% B.≤3% C.≥5% D.≤5%
A.≥300MPa B.≥500MPa C.≥300N/cm D.≥500N/cm
A.≥100MPa B.≥100N/cm C.≥100N/m D.≥100N/mm
A.断裂伸长率应≤10% B.断裂延伸率应≤10% C.最大力伸长率应≥10% D.断裂伸长率应≥10%
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