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【多选题】
压压块材料常用：（）
A.
T10A
B.
Cr12Mo
C.
Cr12V
D.
42CrMo
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
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【单选题】下列对发热机体物质代谢变化的叙述中哪种是错误的
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【简答题】Too many people want others to be their friends,but they don't give friendship back. That is why some friendships don't last very long. To have a friend,you must learn to treat your friend the way you...
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