断裂韧性
参考答案:
金属材料阻止裂纹失稳扩散的属性或材料的韧性。
________ her death in 1886, the poet had become a legend in her hometown.
A.It was before long
B.When before long
C.Ever since
D.Long before
试述艾滋病医护人员的防护要点。