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提问人：网友gxrwan 发布时间：2022-01-07

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The existence of point defects，impurity atoms, dislocations，grain boundary may all hinder the dislocation movement, hence weaken the materials

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更多“The existence of point defects，impurity atoms, dislocations，grain boundary may all hinder the disloc…”相关的问题

第1题

The U.S. sugar quota __________.

A、generates government revenue.

B、results in net welfare benefits to the U.S. economy.

C、results in benefits to sugar producers that exceed the cost to consumers.

D、results in costs to consumers that exceed the benefits to sugar producers.

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第2题

Law is an abstract and philosophical term which can hardly be grasped by contemporary theorists.

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第3题

Too __________ facial expressions are not acceptable in presentations because audience may get distracted by focusing on your exaggerated acting.

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第4题

Which equation describes the Engineering strain?

A、

B、

C、

D、

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第5题

Because of allotropy, steel can be produced from iron

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第6题

A material subjects to a deformation under force and can go back to its original shape. We call the material undergoes an elastic deformation.

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第7题

A single crystal of zinc, like many other single-metal crystal, is farly ductile. There is nothing to prevent slippage of planes of atoms over one another. Explain why some of these metals, like zinc, become brittle when they are in the polycrystalline state, although they are ductile in single-crystal form.

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第8题

What information you can find in a stress-strain diagram?

A、Elastic modulus

B、Yield Point

C、Ultimate Strength

D、Fracture Point

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第9题

Which of the below terms have same meaning?

A、Ultimate Strength

B、Tensile Strength

C、Yield Strength

D、Uniform Strain

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第10题

Which statement is correct?

A、The area under which the straight-line portion (elastic region) of the stress-strain curve is modulus of resilience

B、Modulus resilience is a measure of the energy per unit volume that the material can absorb without plastic deformation

C、Resilience tells you the capacity of a material to adsorb energy when it is deformed elastically and then, upon unloading, to have this energy recovered

D、No

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