The stage natural caving method is the most economical of all mining methods. If the conditions are suitable, it can also achieve high production capacity.
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- The stage natural caving method is the most economical of all mining methods. If the conditions are suitable, it can also achieve high production capacity. A: 正确 B: 错误
- Set methods are also commonly called ________ methods and get methods are also commonly called ________ methods.
- Selection assembly methods are only suitable for job production and small volumeproduction.
- It’s the strongest natural _____ and can stand very high temperatures and be machine washed. A: production B: gratitude C: fabric D: fabrication
- According to the class, methods of training can be divided into cognitive and behavioral methods.