一根直径为8mm、长为1200mm的钢筋受6000N拉伸载荷作用后，有多大的变形？(钢筋的弹性模量E=205000MPa)
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目前金属材料仍旧是制造业中的主要工程材料，但高分子材料、陶瓷材料和复合材料的应用也日益增大。( )
A.She sold all her furniture before she moved house.B.She still keeps some old fu
A. She sold all her furniture before she moved house.
B. She still keeps some old furniture in her new house.
C. She plans to put all her old furniture in the base ment.
D. She brought a new set of furniture from Italy last month.
A.His advanced age.B.His childrens efforts.C.His improved financial cond
A. His advanced age.
B. His childrens efforts.
C. His improved financial condition.
D. His second wifes positive influence.
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