A ductile metal becomes harder and stronger as it is subjected to cold working
A: 正确
B: 错误
A: 正确
B: 错误
A
举一反三
- A ductile metal becomes harder and stronger as it is subjected to cold working
- A ductile metal becomes harder and stronger as it is subjected to cold working
- How is the ductility of a metal normally affected by cold working?Why?
- Natural rubber usually is much stronger and harder than vulcanized rubber. A: 正确 B: 错误
- Communication has created a world economy in which working smarter is more important than______. A: work harder B: working harder C: to work harder D: to working harder
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重结晶过程中，力学性能会发生什么改变? A: harder B: weaker C: more ductile D: softer
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重结晶过程中，力学性能会发生什么改变? A: Harder B: Weaker C: more ductile D: softer
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中国大学MOOC: Natural rubber usually is much stronger and harder than vulcanized rubber.
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The new trend here is _______ in the cold! A: work out B: working out C: working
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Concrete can be made stronger under tension by adding metal rods, wires, mesh or cables to the composite.( )