参考答案:C
[解析] 总杠杆系数＝边际贡献÷[边际贡献-(固定成本+利息)] 边际贡献＝1000×(1-60%)＝400(万元) 原来的总杠杆系数＝2.5×1.6
第6题: [单项选择]海上遇难求生者要有（）。①坚强的意志和毅力、克服绝望恐惧的心理；②经得起寒冷，晕浪，饥饿，口渴的考验
A. ①
B. ②
C. ①②
参考答案:C
第7题:[单选题]1.31 对悬挂境外机动车号牌注册登记_____，持境外主管部门核发的机动车登记证明、机动车入境凭证、不少于临时入境期限的中国机动车交通事故责任强制保险凭证，交验机动车后，即可申请临时入境机动车牌证，免予到检验机构进行安全技术检验。
A.6年以内的7座以下（不含7座）非营运小型微型载客汽车
B.6年以内的7座以下（不含7座）非营运小型微型载客汽车、摩托车
C.6年以内的7座以下（含7座）非营运小型微型载客汽车
D.6年以内的7座以下（含7座）非营运小型微型载客汽车、摩托车
参考答案:B
第8题: [单项选择]锅炉按用途分为( )、工业锅炉、生活锅炉、机车锅炉、船舶锅炉等。
A. 电站锅炉
B. 高压锅炉
C. 沸腾炉
D. 蒸汽锅炉
参考答案:A
第9题: [简答题]许可证中的内容变动时如何办理？
参考答案:
当发生下列情形时，采矿权人应当在采矿许可证有效期内，向登记管理机关申请变更登记：
1.变更矿区范围的；
2.变更主要开采矿种的；
3.变更开采方式的；
4.变更矿山企业名称的；
5.经依法批准转让采矿权的。
凡不办理采矿许可证变更登记的，由登记管理机关责令限期改正；逾期不改正的，由原发证机关吊销采矿许可证。
第10题:[多选题]【多选题】为加强电力生产现场管理，规范各类工作人员的行为，保证（ ）安全，依据国家有关法律、法规，结合电力生产的实际，制定本规程。
A.人身
B.电网
C.设备
D.设施
参考答案:ABC
第11题:[多选题]资产评估的收益法的局限性有（ ）。
A.收益法的应用需具备一定的前提条件
B.收益法不容易被买卖双方接受
C.收益法不能用于轻资产类型的企业价值评估
D.收益法不能体现企业作为经营主体的存在目的
E.收益法的操作含有较大成分的主观性
参考答案:AE
收益法具有一定的局限性。首先，收益法的应用需具备一定的前提条件，对于没有收益或收益无法用货币计量以及风险报酬率无法计算的资产，该方法将无法使用。其次，收益法的操作含有较大成分的主观性，例如对未来收益的预测，对风险报酬率的确定等，从而使评估结果较难把握。
第12题: [单项选择]
一般加工条件下，性能较好的脉冲电源，加工1000mm2的面积时，电极丝的损耗应小于（）。
海关商品名称：其他含磷原子的有机-无机化合物
海关编码：2931901990
法定单位一：千克
惠税：6.5%
普税：30%
增值税：17%
监管条件：AB<
第16题:[判断题] 信号电源屏设备出现T系列模块故障需要更换备件时，在做好防护工作后，直接将T系列模块备件插上即可完成更换。
A.正确
B.错误
参考答案:B
第17题:[单选题]汽车单级主减速器中的小齿轮称为（ ）。
A.主动轮
B.惰轮
C.从动轮
D.过桥轮
参考答案:A
第18题:[判断题]使用钳形电流表测量低压线路和配电变压器低压侧电流，应注意不触及其他带电部位，以防接地短路。
A.正确
B.错误
参考答案:B
第19题:[单选题]两台桥机并车起吊转子，（），现场总指挥应将转子起吊工艺、安全措施进行全面交底，并进行人员分工。
A.起吊中
B.检修前
C.起吊前
D.起吊后
参考答案:C
第20题:[单选题]在水准测量过程中临时选定的立尺点，其上既有前视读数,又有后视读数，这些点称为（）。
A.A、水准点
B.B、中点
C.C、转点
D.D、待定点
参考答案:C
第21题:[单选题]《建筑工程饰面砖粘结强度检验标准》JGJ/T110-2017规定:现场外墙饰面砖工程每()㎡同类基体为一个检验批,不足()㎡按一个检验批计。
A.100
B.200
C.400
D.500
参考答案:D
第22题:[单选题]（ A ）是班组安全工作的第一责任人，对班组安全工作负责。
A.班组长
B.安全员
C.员工
D.班组长分管领导
参考答案:A
第23题:[单选题]高压引线的接线应牢固，并采用专用的高压试验线，试验中当试验电压为200kV时，高压引线及高压带电部件至邻近物体及遮栏的距离应大于（ ）m。
A.1
B.1.5
C.2
D.2.5
参考答案:B
第24题: [单项选择]甲将其在某合伙企业中的财产份额转让与乙，双方签订转让协议。后甲的债权人丙请求对该财产份额强制执行。以下判断中，（）是正确的。
A. 如果转让协议已经取得其他合伙人的一致同意，则丙无权请求强制执行
B. 如果转让协议尚未取得其他合伙人的一致同意，丙只有在其他合伙人表示不同意的情况下，才有权请求强制执行
C. 无论转让协议是否取得其他合伙人的一致同意，丙都无权请求强制执行
D. 无论转让协议是否取得其他合伙人的一致同意，丙都有权请求强制执行
参考答案:A
第25题: [单项选择]在控制图上，上控制限UCL与下控制限LCL之间的距离是（）。
A. σ
B. 2σ
C. 3σ
D. 6σ
参考答案:D
第26题: [填空题]拒绝、阻碍国家工作人员依法执行职务，使用（）威胁方法的。
参考答案:暴力
第27题: [单项选择]人工拆除施工顺序为（），逐层拆除分段进行，不得垂直交叉作业。
A. 应从左至右
B. 应从下至上
C. 应从上至下
参考答案:C
第28题: [单项选择]在Windows系统中，若要移动窗口，可用鼠标拖动窗口的 (40) 。
A. 标题栏
B. 菜单栏
C. 状态栏
D. 工具栏
参考答案:A
答案解析:[解析] 在Windows系统中，用鼠标拖动某个窗口的标题栏，可移动该窗口到适当的位置。
第29题:[判断题]电流分为直流电流和交流电流两种。( )
A.正确
B.错误
参考答案:A
第30题:[单选题]低压业扩范围是指用电电压等级在( )kV以下的客户新装工作，低压业扩工作涉及面广，工作量较大，供电所要严格按承诺时间做好流程中各环节工作，为客户提供优质服务。
A.0.4
B.0.22
C.10
D.1
参考答案:D
第31题:[单选题]Linux启动的第一个进程init启动的第一个脚本程序是。
A./etc/rC.d/init.d
B./etc/rC.d/rC.sysinit
C./etc/rC.d/rc5.d
D./etc/rC.d/rc3.d
参考答案:B
第32题:[单选题]过度劳作易形成( )
A.痰湿体质
B.瘀血体质
C.虚性体质
D.火热体质
E.痰瘀体质
参考答案:C
第33题: [多项选择]Quality of products
参考答案:[听力原文]
EXAMINER: Let’s move on to Part C. We discussed an experience in which a piece of equipment or other device you used broke and now I’d like to discuss with you one or two more general questions related to this. Let’s consider first of all, quality of products. Are most products designed with durability in mind
CANDIDATE: Well, that’s an interesting question. I think from one perspective, well, we’d like to imagine that products are designed with durability in mind so that they last for a long time and therefore people wouldn’t have to buy new products in a short period of time. However, I think that some companies quite deviously design their products so that they actually break fairly easily. Because of this, then you’re forced to buy maybe the latest product.
EXAMINER: Should parts for products be universally available or only available from the original manufacturer
CANDIDATE: I think from the customer’s point of view it would be useful if they were universally available. This would make it much easier for them to buy parts when necessary. However, I can understand that companies would put a patent on their parts so that you would have to buy from them.
EXAMINER: How important are product warranties
CANDIDATE: I think product warranties are fairly important for expensive items. If, for example, you bought a new laptop, which maybe costs, you know, say A,000 pounds, it would be rather silly not to have a warranty because if it broke, then you would have to buy a new one. Whereas if you had a warranty, you could replace it free of charge possibly.
EXAMINER: Now let’s talk about dealing with problems. Were people in the past more patient than people in today’s society
CANDIDATE: Yeah, I think people probably were more patient in the past. I think the main reasons for this are that we live in a society which expects instant gratification, especially since the development of the Internet where we can immediately find a piece of information or send an email to friends. We’re not used to waiting for a long time any longer.
EXAMINER: Do people from different cultures deal with problems in different ways
CANDIDATE: I think they probably do. For example, I think in the west we tend to express our problems much more openly. Whereas say in Asia, people try and not express them as much. So I think both of these have advantages and disadvantages. For example, I think often in the west maybe if we wouldn’t voice our problems or concerns so much, then it wouldn’t seem so much of a problem. I think we tend to dramatise them somewhat.
EXAMINER: And could you discuss some of the different ways males and females react to problems
CANDIDATE: Well, I think when faced with a problem, males tend to try and deal with the problem somewhat rationally. So rather than getting overly irate or emotional, they’ll probably think, you know, "What is the problem " ; "Is there something I can do ". If there is something that they can do, they’ll do it and if not, then they may just, you know, let it be. Whereas there is a view, that women can sometimes deal with problems in a much more emotional manner.
EXAMINER: Let’s talk about reliance on technology. In what ways do we depend on technology in modern life
CANDIDATE: I think that nowadays we tend to rely on technology quite a lot. We’ve almost become slaves to technology, I’d say especially to email. You know, we can’t stop ourselves from logging onto the Internet every hour to check if someone’s tagged a picture of us or something. So, in some ways it’s made our life more convenient but I think from another perspective, we rely on it too much.
EXAMINER: What are some of the dangers of relying on technology
CANDIDATE: I think that some of the dangers are that it can actually distance us from other people. So although having things like email and messenger allows us to communicate with people instantly, it somewhat reduces the personal element of communication.
EXAMINER: What roles do you see technology play in the future
CANDIDATE: That’s quite a difficult question. I mean, in the past B0 years there has been a huge change in technology so I guess our imagination is the limits for what could happen in the future. I suppose it would be possible that we could have a microchip implanted in our brain whereby we could just think of something and thereby call someone or send a text message without even having to use our hands.
EXAMINER: Thank you very much. That is the end of the speaking test.
第34题:[判断题]因两种金属的化学性能不同，会产生电化腐蚀，使导线接头烧断，所以不能直接连接而采取铜铝过渡接头连接。
A.正确
B.错误
参考答案:A
第35题:[判断题]行车有关人员，接班前须充分休息，严禁饮酒，如有违反，立即停止其所承担的任务。
A.正确
B.错误
参考答案:A
第36题: [单项选择]20岁青年摘除扁桃体后，发烧，出现心力衰竭。采血培养细菌，血平板有草绿色溶血环小菌落形成。涂片染色为G+链状排列球菌，诊断为甲型溶链心内膜炎。试问下列中还有哪种菌能形成草绿色溶血环菌落
A. 金黄色葡萄球菌
B. 表皮葡萄球菌
C. 乙型溶血链球菌
D. 丙型链球菌
E. 肺炎球菌
参考答案:E
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