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[职业资格类试卷]焊工技师模拟试卷1（无答案）.doc

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焊工技师模拟试卷 1（无答案）一、多项选择题下列各题的备选答案中，至少有一个是符合题意的，请选出所有符合题意的备选答案。1 非氧化物陶瓷是指由( )等元素结合而成的难熔化合物。（A）N（B） A1（C） Si（D）B（E）C

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