【单选题】【消耗次数：1】
如果裂缝开裂较深时，应将裂缝附近的混凝土表面凿毛，或沿裂缝方向凿成深为（）、宽为（）的V形凹糟。
①
10~20mm，15~20mm
②
15~20mm，10~20mm
③
15~20mm，20~30mm
参考答案：
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Because
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time before time
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circles
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would not see
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having not seen
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did she return
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that she returned
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sensitive
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