题目内容
（请给出正确答案）
Aluminum is found on earth mostly in the form. of______.
A．pure metal
B．bauxite
C．gold
D．liquid
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A．combined
B．having combined
C．combine
D．being combined
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
What is a by-product of burned coal？
A. Aluminum, silicon, and magnetic.
B. Paving material.
C. Fly ash.
D. Concrete additive.
(The metal) aluminum (has been) (first) isolated (early) in the nineteenth century.
A．The metal
B．has been
C．first
D．early
What can be extracted from fine-powder fly ash？
A. Aluminum, silicon, and magnetic.
B. Additive.
C. Paving material.
D. Cement.
Aluminum is______.
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
What is the passage talking about？
A．The features of aluminum and its functions.
B．The process of aluminum.
C．The discovery of aluminum.
D．The promising future of aluminum.
According to the passage, what material is required for lithography？
A．Rugged bark.
B．Coarse canvas.
C．Crinkled aluminum foil.
D．Smooth metal plate.
According to the passage, what attracts man's greater attention？
A. Fly ash.
B. The construction of dams, bricks, and roads.
C. Extracting aluminum, silicon, and magnetic from ash.
D. The available technology.
请按照如下提供的信息填制中国原产地证书：
我出口公司(Shanghai Shen Hua I/E Co．Ltd，Add．6/F，Changan Bldg．No.1001 Changan Road，Shanghai)与进口商(Red Sea Aluminum Factory，Add．P．O．Box 17902，Jeddah 21494，Saudi Arabia)达成了以CIF贸易术语出口一批货号为ART.2010的塑料玩具(Plastic Toy)(H.S.Code：95.01)的合同，发票(Invoice No．9411285，Date：Oct．28，2004)单价为12.50美元，共1000件，每10件装一个纸箱，每个纸箱毛重25公斤。为进口商设计一个运输标志。我出口公司于2004年11月18日向中国国际商会提出原产地证书签证申请。
