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电阻串联电路的总电阻为各电阻（）。
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苏秦和张仪一个搞合纵，一个搞连横，他们彼此之间首先行成了（）
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呃逆发生的机理与下列哪些因素有关（）
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CO2压缩机，设计吸入压力高报35MPa，跳车40KPa，低报0KPa，跳车10KPa。
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锚杆锚固力试拉应分几次进行试拉（）.
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《国际危规》根据货物（）将危险货物分为9大类。
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简述大跨拱结构类别及特点
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财务总监根据企业战略发展规划和年度经营计划，负责企业总体财务规划，领导、监督企业会计核算、财务管理、内部审计等各项工作，加强企业经济管理，提高经济效益，维护股东权益。
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Once there was a little girl who came to live in an orphanage (孤儿院). As Christmas time was drawing near, all of the other children 11 telling the little girl about the beautiful Christmas tree that would appear in the hall downstairs on Christmas morning. After their usual 12 , each child would be given their only Christmas gift, a small orange. The headmaster of the orphanage was very 13 with the kids. So on Christmas Eve, when he 14 the little girl slipping down the stairs to peek（偷看）at the much-heard-of Christmas tree, he 15 that the little girl would not receive her Christmas orange because she had been so curious as to disobey the rules. The little girl ran back to her room 16 , crying at her terrible fate. The next morning as the other children were going down for breakfast, the little girl stayed in her bed. She couldn’t 17 the thought of seeing the others receive their gift while there would be 18 for her. Later, as the children came back upstairs, the little girl was surprised to be handed a napkin (餐巾). As she carefully opened it, there, to her 19 , was an orange all peeled and sectioned (分瓣). “ How could this be? ” she asked. Then, she realized how each child had taken one section from their orange for her so that she, too , would have a Christmas orange. What an example of the true meaning of Christmas those orphan children showed that morning! How I 20 the world would show the same kind of concern for others, not only at Christmas, but throughout the year! 请在12处填上正确答案（）
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铝热焊焊接钢孰时，浇铸前应当钢轨端部进行预热，一般的预热方法要用气体火焰将钢轨端郝预热到（）CC，为防止钢轨端部发生预热氧化，不得使用氧化焰，应使用中性焰进行预热。