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【单选题】
造成铸件表面粘砂,使铸件表面粗糙度不易加工的原因是型砂和芯砂( )。
A.
透气性不好
B.
退让性差
C.
耐火性差
D.
强度不够
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A.
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B.
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【简答题】11-06.mp3:
【单选题】已知46°W地方时为11月30日14:30,则98°E的地方时为 [     ]
A.
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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E.
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A.
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B.
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D.
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【简答题】A.She will watch the movie later. B.Her watch is broken. C.Her television set isnt working. D.She will watch TV while she eats.
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