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  3. The price of aluminum was sharply reduced when people discovered a new refining process with the aid of ______. Which of the fo

The price of aluminum was sharply reduced when people discovered a new refining process with the aid of ______. Which of the fo

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问题 The price of aluminum was sharply reduced when people discovered a new refining process with the aid of ______.
Which of the following is NOT true?
选项 A、Aluminum is widely used in transportation.
B、Aluminum is also used in many parts of airplanes.
C、Aluminum is being used extensively in the building industry.
D、Aluminum is not used in its pure form.
答案D
解析 本题为细节辨认题。从文中我们可以得知铝有广泛的用途，可用于交通运输，建筑业等。而自然状态的铝都不是以纯净状态存在的。
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