焊条电弧焊时会产生可溶性氟、氟化氢、锰、氮氧化物等有毒气体和粉尘（　）。

[问答题]Passage 1Finding the Lost Freedom　　A  The private car is assumed to have widened our horizons and increased our mobility. When we consider our children’s mobility, they can be driven to more places (and more distant places) than they could visit without access to a motor vehicle. However, allowing our cities to be dominated by cars has progressively eroded children’s independent mobility. Children have lost much of their freedom to explore their own neighborhood or city without adult supervision. In recent surveys, when parents in some cities were asked about their own childhood experiences, the majority remembered having more, or far more, opportunities for going out on their own, compared with their own children today. They had more freedom to explore their own environment.　　B  Children’s, independent access to their local streets may be important for their own personal, mental and psychological development. Allowing them to get to know their own neighborhood and community gives them a “sense of place”. This depends on “active exploration”, which is not provided for when children are passengers in cars. (Such children may see more, but they learn less.) Not only is it important that children be able to get to local play areas by themselves, but walking and cycling journeys to school and to other destinations provide genuine play activities in themselves.　　C  There are very significant time and money costs for parents associated with transporting their children to school, sport and to other locations. Research in the United Kingdom estimated that this cost, in 1990, was between 10 billion and 20 billion pounds.　　D  The reduction in children’s freedom may also contribute to a weakening of the sense of local community. As fewer children and adults use the streets as pedestrians, these streets become less sociable places. There is less opportunity for children and adults to have the spontaneous exchanges that help to engender a feeling of community. This in itself may exacerbate fears associated with assault and molestation of children, because there are fewer adults available who know their neighbors’ children, and who can look out for their safety.　　E  The extra traffic involved in transporting children results in increased traffic congestion, pollution and accident risk. As our roads become more dangerous, more parents drive their children to more places, thus contributing to increased levels of danger for the remaining pedestrians. Anyone who has experienced either the reduced volume of traffic in peak hour during school holidays, or the traffic jams near schools at the end of a school day, will not need convincing about these points. Thus, there are also important environmental implications of children’s loss of freedom.　　F  As individuals, parents strive to provide the best upbringing they can for their children. However, in doing so, (e.g. by driving their children to sport, school or recreation) parents may be contributing to a more dangerous environment for children generally. The idea that “streets are for cars and back yards and playgrounds are for children” is a strongly held belief, and parents have little choice as individuals but to keep their children off the streets if they want to protect their safety.　　G  In many parts of Dutch cities, and some traffic calmed precincts in Germany, residential streets are now places where cars must give way to pedestrians. In these areas, residents are accepting the view that the function of streets is not solely to provide mobility for cars. Streets may also be for social interaction, walking, cycling and playing. One of the most important aspects of these European cities, in terms of giving cities back to children, has been a range of “traffic calming” initiatives, aiming at reducing the volume speed of traffic. These initiatives have had complex interactive effects, leading to a sense that children have been able to “recapture” their local neighborhood, and more importantly, that they have been able to do this in safety. Recent research has demonstrated that children in many German cities have significantly higher levels to freedom to travel to places in their own neighborhood or city than children in other cities in the world.　　H  Modifying cities in order to enhance children’s freedom will not only benefit children. Such cities will become more environmentally sustainable, as well as more sociable and more livable for all city residents. Perhaps it will be our concern for our children’s welfare that convinces us that we need to challenge the dominance of the car in our cities.　　Complete each sentence with the correct ending i-x below.　　Write the correct number i-x in boxes 1-6 on your answer sheet.　　1. By driving their children to school, parents help create ______　　2. Children should play ______　　3. In some German towns, pedestrians have preference right of walking ______　　4. Streets should also be used for ______　　5. Reducing the amount of traffic and the speed is ______　　6. All people who live in the city will benefit if cities are ______

[问答题]简述电力机车总体的组成及各部分的作用。

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[填空题]《随想录》的作者是（）；《我与地坛》的作者是（）；《回答》的作者是（）；《祖国啊，我亲爱的祖国》的作者是（）。

[单选题]甲公司向乙公司购买某水果，合同对该水果的品质作了具体的规定，如水果甜度、水份、表皮的颜色。乙公司必须按上述约定予以履行，既不能高于约定的标准，也不能低于约定的标准。该行为遵循的原则是（）

[判断题]白天抛给落水者使用的应该是附有自发烟雾信号的救生圈。（）

[单选题]为了在“大数据”技术研究和开发领域有效整合资源，中国电信设备供应商H公司与英国D学院结成伙伴关系，共同寻求发展“大数据”技术。为此，双方可以开展的合作项目有（）①利用D学院教育及科研优势，为H公司培养“大数据”技术人才②利用H公司雄厚经济实力，为D学院更新教学设备，提升其国际影响力③针对大数据相关技术问题，D学院与H公司技术人员联合开展研究④借助H公司的销售网络，D学院推销该校各项研究成果

[单选题]下列选项中，属于业务单位战略的是（　）

[单选题]2016年12月31日，甲公司将一栋管理用办公楼以352万元的价格出售给乙公司，款项已收存银行。该办公楼账面原价为600万元，已计提折旧320万元，未计提减值准备，公允价值为280万元；预计尚可使用寿命为5年，预计净残值为零。2017年1月1日，甲公司与乙公司签订了一份经营租赁合同，将该办公楼租回；租赁开始日为2017年1月1日，租期为3年；租金总额为96万元，每年年末支付。假定不考虑税费及其他相关因素，上述业务对甲公司2017年度利润总额的影响金额为（　　）万元。

[多选题]为明确诊断，应进一步做何种检查？（　　）

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