When aluminum was first produced about a hundred and fifty years ago, it was so difficult to separate from the ores in which it was found that its price was higher than that of gold. The price remained high until a new process was discovered for refining the metal with the aid of electricity approximately three quarters of a century later. The new method was so much cheaper that aluminum became practical for many purposes, one of which was making pots and pans.
Aluminum is lightweight, rustproof and easily shaped into different forms. By mixing it with other metals, scientists 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 engine 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.

A:lightweight, rustproof but not easily shaped into different forms B:heavyweight, rustproof and easily shaped into different forms C:lightweight, rustproof and easily shaped into different forms D:lightweight and easily shaped into different forms but it is easy to become rusty

A.Germany
B.Governor
C.packaGe
D.Geography

汉译英“外包装；泡沫塑料；防锈包装”（）。

A:outer package；rustproof packaging；plastic foam B:outer package；plastic foam；rustproof packaging C:rustproof packaging；outer package；plastic foam D:plastic foam；rustproof packaging；outer package

汉译英
“外包装；泡沫塑料；防锈包装”( )。

A:outer package; rustproof packaging；plastic foam B:outer package; plastic foam; rustproof packaging C:rustproof packaging; outer package; plastic foam D:plastic foam; rustproof packaging; outer package

汉译英：“防锈包装；外包装；泡沫塑料”，正确的翻译为( )。

A:plastic foam；rustproof packaging；outer package B:outer package；plastic foam；rustproof packaging C:rustproof packaging；outer package；plastic foam D:outer package；rustproof packaging；plastic foam

汉译英：“透明包装；防锈包装；防潮包装”，正确的翻译为( )。

A:rustproof package；moisture proof package；transparent package B:transparent package；rustproof package；waterproof package C:moisture package；rustproof package；transparent D:transparent package；rustproof package；moisture proof package

汉译英“外包装；泡沫塑料；防锈包装”（）。

A:outer package；rustproof packaging；plastic foam B:outer package；plastic foam；rustproof packaging C:rustproof packaging；outer package；plastic foam D:plastic foam；rustproof packaging；outer package