皮皮学，免费搜题
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【多选题】
冷加工再结晶退火后,下列说法哪个是正确的?A.
其晶粒形状会改变
B.
其机械性能会发生改变
C.
其晶格类型会发生改变
D.
其晶粒大小会发生改变
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】How can we protect ourselves? What are the coronaviruses afraid of? (You can find the answer from the video.)
【简答题】小人国又叫 。
【简答题】§ What are the major threats the Longmen Grottoes face during these years? Thus what measures did the country take to solve these problems and protect these cultural relics?