应力腐蚀断裂属于()
A.脆性断裂
B.韧性断裂
C.塑性断裂
参考答案:A
He________live in the south, so it is hard for him to________the climate here.[ ]
A. was used to; be used to
B. used to; used to
C. was used to; get used to
D. used to; get used to
分封制在周初和周后期的结果截然不同,导致这种现象的根本原因是()
A.周王室衰微
B.生产力的发展
C.诸侯争权夺利
D.生产关系的变化