[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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