题目内容

The assumption of deformed solids in material mechanics does not include()

A. Continuity hypothesis
B. Uniformity hypothesis
C. Isotropic hypothesis
D. Plane hypothesis

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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()

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

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

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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