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【单选题】
根据零件的结构特点可将非标准零件分为4种典型零件:( )。A.
合金类、非金属类、特制类、其他类
B.
大型类、中型类、小型类、特小类
C.
铸造类、锻压类、焊接类、机加工类
D.
轴套类、类、箱体类、叉架类
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【简答题】London used to be “foggy” for the same reason that cities like Beijing or Chongqing are “foggy” today. The “fog” was in fact smog, a mixture of smoke and fog. In other words, it was made by air pollut...
【简答题】A．It's wet. B．It's foggy. C．It's wet and foggy. D．It's cool and dry.
【简答题】London used to be “foggy” for the same reason that cities like Beijing or Chongqing are “foggy” today．The “fog” was in fact smog, a mixture of smoke and fog．In other words, it was made by air pollutio...
【简答题】foggy
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