题目内容

In the tensile experiment of low-carbon steel, the stage where the stress remains basically the same while the strain increases significantly is called（）

A. Elastic region
B. Yielding
C. Strain hardening
D. Necking

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On the assumption of uniformity, the of a component is assumed to be the same everywhere（）

A. Displacement
B. Stress
C. Strain
D. Modulus of elasticity

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When the shear stress exceeds shear proportional limit of the material，which of the following is correct（）

A. The reciprocal theorem of shear stresses is not valid
B. The reciprocal theorem of shear stresses is right
C. Shear hooke’s law still is right
D. Shear deformation is still elastic deformation

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Half.com’s Take Five! Program is another example of viral marketing, where registered users at the site selling used books, music, movies, and games are given an incentive, such as coupons to tell the

A. viral marketing
B. video advertising
C. microblog marketing
D. Integrated marketing

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The stress perpendicular to the section is called（）

A. Total stress
B. Normal stress
C. Shear stress
D. Principal stress

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In the tensile experiment of low-carbon steel, the stage where the stress remains basically the same while the strain increases significantly is called（）

A. Elastic region B. Yielding C. Strain hardening D. Necking

On the assumption of uniformity, the of a component is assumed to be the same everywhere（）

When the shear stress exceeds shear proportional limit of the material，which of the following is correct（）

Half.com’s Take Five! Program is another example of viral marketing, where registered users at the site selling used books, music, movies, and games are given an incentive, such as coupons to tell the

The stress perpendicular to the section is called（）

A. Elastic region
B. Yielding
C. Strain hardening
D. Necking