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更多“工业生产氧化铝主要矿石有铝土矿、霞石、明矾石、高岭石等。()”相关的问题
A.极大地促进了生产力的发展
B.使主要资本主义国家的国民经济结构发生了显著变化
C.促进了生产过程的合理化
D.使社会结构向城市化趋势发展，而且带来一个高度竞争和贫富两极分化的世界工业生产体系
Aluminum is lightweight, rustproof and easily shaped into different forms. By mixing it with other metals, scientist have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much.
Today, the uses of aluminum are innumerable. Perhaps its most important use is in transportation. Aluminum is found in the engines of automobiles, in the hulls of boats. It is also used in many parts of airplanes. In fact, the huge "airbus" planes would probably never have been produced if aluminum did not exist. By making vehicles lighter in weight aluminum has greatly reduced the amount of fuel needed to move them. Aluminum is also being used extensively in the building industry in some countries.
Since aluminum is such a versatile(多用的) metal, it is fortunate that bauxite(铝土矿) , which is one of its chief sources, is also one of the earth's most plentiful substances. As the source of aluminum is almost inexhaustible, we can expect that more and more uses will be found for this versatile metal.
The price of aluminum was sharply reduced when people discovered a new refining process with the aid of______.
A．wind power
B．solar energy
C．hydraulic power
D．electricity
