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【简答题】
为保证零件加工质量和合理地使用设备、人力，机械加工工艺过程一般可以分为（）、（）、（）和光整加工阶段。
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【单选题】The little girls attention was suddenly caught by a rag doll which ______ put on the sofa, and she stopped crying.
A.
has been
B.
is being
C.
would be
D.
had been
【单选题】某分部工程双代号网络计划如下图所示，根据下表给定的逻辑关系和双代号网络计划的绘图规则，其作图错误问题是（ ）。
A.
节点编号不对
B.
逻辑关系不对
C.
有多个起点节点
D.
有多个终点节点
【简答题】A Little girl lived with her grandmother after her parents died. They slept in an upstairs bedroom. One night there was a big fire in their house. The whole house was burning. The little girl appeared...
【简答题】One winter afternoon, a little mouse goes out 1 a walk. Suddenly the little mouse sees a hole. He thinks it must be his friend’s house. So he goes into it. To his surprise, it isn’t a mouse’s house, b...
【简答题】例 4: 绘出下表工作关系的双代号网络计划图 . 工作 ( 工序 ) A B C D E 紧前工作 - - A AB B
【简答题】例 3: 绘出下表工作关系的双代号网络计划图 . 工作 ( 工序 ) A B C D E F 紧前工作 - - - AB AC ABC
【简答题】One day, Edison _________(wait) for a train to arrive suddenly a little boy ran to the track to play.
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