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判断题 In normall concrete, the reinforcing is protected by naturally high alkalinity of the concrete with a pH of about 10
学科：默认课程
时间：2025-11-29 05:45:20
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题目10判断题
In normall concrete, the reinforcing is protected by naturally high alkalinity of the concrete with a pH of about 10A. 正确B. 错误
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