carbon is added to iron in proper __________, the result is
steel.
A: rates
B: thicknesses
C: proportions
D: densities
举一反三
- When carbon is added to iron in proper _________ the result is steel.
- How does steel differ from pig iron? A: Less carbon B: More carbon C: Steel is preferred by sheep and chooks D: None of the above
- The word RESULT elevated its meaning from just “result”<br/>to “good result”. It added a ______ feature (+ good).() A: phonetic B: morphological C: semantic D: grammatical
- According to the passage, how did Bessemer method make the mass production of steel possible A: It directed air at melted iron in a furnace, removing all impurities. B: It slowly heated iron ore then stirred it and heated it again. C: It changed iron ore into iron which was a substitute for steel. D: It could quickly find deposits of iron ore under the ground.
- Iron and steel are flexible. But they are not as flexible ______ rubber. A) as C) to B) for D) by A: Iron and steel are flexible. But they are not as flexible ______ rubber. B: as C: for D: to E: by
内容
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The main social services of the iron and steel industry system are the provision of iron and steel products and the consumption of iron ore A: 正确 B: 错误
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If the carbon content of a type of steel is 0.1%， this steel is a kind of （ ）. A: low-carbon steel B: medium-carbon steel C: high-carbon steel D: HTLA steel
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High-speed steel is also___________________(know) as self-hardening steel.
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When roughing cast iron, the mainly cooling cutting fluid should be added with sufficient and uniform flow .
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According<br/>to the expectations hypothesis, an upward-sloping yield curve implies<br/>that ________ A: interest<br/>rates are expected to remain stable in the future. B: interest<br/>rates are expected to decline in the future. C: interest<br/>rates are expected to increase in the future. D: interest<br/>rates are expected to decline first, then increase. E: interest<br/>rates are expected to increase first, then decrease.