問題詳情
3. Within a few decades, firms may be meeting earthly demands for precious metals, such asplatinum and gold, and the rare earth elements _______for personal electronics, such asyttrium and lanthanum.
(A) friendly
(B) ready
(C) suitable
(D) vital
(A) friendly
(B) ready
(C) suitable
(D) vital
參考答案
無參考答案
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