题目详情
单选题 Iron is produced commercially on every continent and on many islands. The United States is one of the major producers of iron. Although some metals seem more valuable, iron is the most important metal in the world. The great industrial development of the United States has made use of tremendous quantities of iron. It is fortunate that its domestic supply is so ______
A. expensive
B. large
C. deep
D. localized
学科:工程学科英语
时间:2023-06-26 05:32:32
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