こんな重要な仕事は私にできる( )( )( )( )、初めは不安でした。
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What are the characteristics of the shear and bending moment diagram at the position where the concentrated force F acts?
A. The shear force has a jump, and the jump value is
B. The bending moment jumps occurs, and the jumps value is F
C. There is a sharp point on the shear diagram
D. There is a sharp point on the bending moment diagra
铁素体是晶格。
A. 体心立方;
B. 面心立方;
C. 密排六方;
D. 复杂的
金属化合物特性是硬而脆,莱氏体的性能也是硬而脆,故莱氏体属于金属化合物。
A. 对
B. 错
碳溶解在α-Fe形成间隙固溶体是奥氏体组织
A. 对
B. 错