A: Grain refinement
B: Intergranular corrosion
C: Toughness increase
D: Hardening tendency
举一反三
- The problems that ferritic steel produces during welding are ( ). A: Grain refinement B: Intergranular corrosion C: Toughness increase D: Hardening tendency
- Boron is added to structural steel to increase its ( ). A: tempering stability B: toughness C: hardenability D: hardening capacity
- Which of the following are characteristics of the steel structure? A: High strength and low weight B: Good plasticity and toughness C: Easy to manufacture and construct D: Weak corrosion resistance
- With （）， the corrosion problems are much reduced in a central cooling system.
- If the heating temperature is increased after recrystallization, ( ) will take place. A: secondary recrystallization B: fine grain strengthening C: work hardening D: solid solution strengthening
内容
- 0
Suppose that the United States eliminates its tariff on steel imports, permitting foreign-produced steel to enter the U.S. market. Steel prices to U.S. consumers would be expected to: A: Increase, and the foreign demand for U.S. exports would increase B: Decrease, and the foreign demand for U.S. exports would increase C: Increase, and the foreign demand for U.S. exports would decrease D: Decrease, and the foreign demand for U.S. exports would decrease
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原文:听音频翻译. 译文:The annual output of grain ...an increase of 9.1%.
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The welding operations of welding robots mainly include ( ) A: spot welding B: arc welding C: flat welding D: Continuous welding
- 3
During the current year, the assets of The Big Dial increase by $132,000, and the liabilities increase by $80,000. As a result, owners' equity A: decreases by $52,000 during the year. B: increases by $52,000 during the year. C: increases by $212,000 during the year. D: is $52,000 at the end of the year.
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My grandparents _______ to go to bed earlier during the winter. A: tend B: tender C: trend D: tendency