钢的基本特性是强度高、()，可锻、轧成各种所需形状。
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炼钢生产常用的脱氧方法有沉淀脱氧、()和真空脱氧。
The best way to mix gypsum products is to()
A. eyeballthe amount ofpowder added to water
B. add water to the powder
C. add powder to the water
D. add powder and water to the bowl simultaneously
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