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问题
判断题
铁碳合金中珠光体（P）属于机械混合物。
答案
参考答案：
对
选择题
He ______ his hometown for many years.
A. has left
B. has been away
C. has been away from
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判断题
中秋节的主祭一般是家中的男性。( )
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