举一反三
- The front loading machine can be used as the main mining and loading equipment in large open pit mines.
- he main production links of open-pit mining production technology include rock preparation, mining and loading, transportation and .
- 中国大学MOOC: If the electric flux through a closed surface is 0, then there is no net charge inside the surface.
- If the electric flux through a closed surface is 0, then there is no net charge inside the surface. A: 正确 B: 错误
- On the ideal conductor surface, the relationship between the electric field lines and the conductor surface is A: the electric field lines is always pertendicular to the conductor surface. B: the electric field lines is always parallel to the conductor surface. C: there is no electri field lines exsited. D: unable to determine the relationship.
内容
- 0
If something ______<br/>a surface, it makes long stripes or marks on the surface. A: echoes B: clings C: strips D: pits
- 1
What are the advantages of ramp development method?( ) A: It is less affected by terrain, industrial site and other conditions B: Early commissioning C: Convenient, flexible, less links D: Excavation, mining, loading, transportation, unloading comprehensive mechanization, high efficiency, low cost E: Save a lot of steel
- 2
The main production links of the open-pit production process include ( ). A: Ore and rock preparation B: Mining and loading C: Transportation D: Breaking
- 3
中国大学MOOC: In art, _________ means the last covering of paint, polish, etc. that is put onto the surface of something; the condition of the surface.
- 4
EXW 包括如下费用： Cost + Loading after Sealing 。