题目内容
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[单选题]
Which of the following materials belongs to compounds？
A.copper
B.Fe2O3
C.steel
D.gasoline
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发布时间：2022-01-07
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A、Curry Crab.
B、Sushi.
C、Pizza.
D、Bibimbap.
题目内容
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第9题
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第10题
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