皮皮学，免费搜题
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搜题
【多选题】
喷丸强化是利用大量快速运动的珠丸打击工件表面, 使工件表面产生(),可以显著提高零件的疲劳强度和使用寿命A.
金相组织变化
B.
压应力
C.
拉应力
D.
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：
皮皮学刷刷变学霸
举一反三
【单选题】The mother only ____ her son’s marriage long after the event.
A.
learned of
B.
realized
C.
came to
D.
worked out
【简答题】The mother placed the blanket over the boy, leaving only his face (uncover) __________.
【判断题】In " The Swing" , the mother was the only person who was not given a name by the author.
A.
正确
B.
错误
【简答题】The mother only learn _____ her son's marriage long after the .
【简答题】The mother only __________ her son’s marriage long after the .
【简答题】The mother only her son's marriage long after the . (learn of)
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