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Reading ComprehensionSection ADirections: There are ten incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose the ONE that best completes the sent

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球团矿的FeO含量合格质量考核标准为（）

A. ≤2%
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Section BDirections: There are ten blanks in the following letter. You are required to choose the best one from the given four choices marked A, B, C, and D. Then write down the correct answer in the