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He ____ live in a remote and underdeveloped country than in this modern but noisy city..
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焊缝缺陷返修要求挖除缺陷时，一般每侧不应超过板厚的（)。A......
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对于圆度误差为奇数棱的三棱等径圆，应采用三点法测量其圆度.....
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弯曲试验的目的是测定焊接接头的（)。A.强度B.塑性C.韧性D.硬度..
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背弯容易发现焊缝（)缺陷。A.表面B.根部C.内部..
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It was three weeks later ____ he heard the news.A which B that C after D when..
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