Which of the following is the most abundant solid mineral in the seabed?( )
A: Manganese nodule
B: Nickel ore
C: Copper mine
D: Cobalt ore
A: Manganese nodule
B: Nickel ore
C: Copper mine
D: Cobalt ore
举一反三
- Which of the following is the ore breaking methods?( ) A: Artificial ore breaking B: Mechanical and hydraulic ore breaking C: Rock drilling and blasting D: The other three options all meet the requirements
- The most abundant element amongst the following as found in plants is A: Carbon B: Nitrogen C: Iron D: Manganese
- Which of the following statements is true?( ) A: The other three options all meet the requirements B: Leveling refers to leveling the surface of ore retention pile after local ore releasing. C: Prying roof means that the roof and two sides of loose ore rock should be pryed off when the site is leveled. D: Gravity ore drawing is generally adopted for local ore releasing
- Which of the following is not included in the three properties of ore?( ) A: Physicochemical propertie B: Caking property C: Oxidizability D: Spontaneous combustion
- Which of the following is not included in the ore transportation method?( ) A: Gravity transportation B: Mechanical transportation C: Drilling transportation D: Hydraulic transportation