相关试题
【判断题】
JZ-7型空气制动机自阀手把紧急制动位，制动缸的压力达到450kPa，其升压时间为5--7s。
【判断题】
JZ-7型空气制动机中均管泄漏时，自阀手柄前五位与均衡风缸泄漏现象相同，取柄位时，均衡风缸排气速度正常，制动管压力逐渐下降。
【判断题】
JZ-7型空气制动机自阀制动后，工作风缸外漏会使机车不制动或制动后自然缓解，但内漏时不影响。
【判断题】
JZ-7型空气制动机工作风缸压力既不会追随制动管减压，也不会追随制动管阶段增压。
【判断题】
JZ-7型空气制动机作用阀的作用位置一是缓解位，二是制动后的保压位。
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运行中，不能观察到车顶百叶窗状态，故无法判断冷却风扇是否全速运转。
【判断题】
机车正常运用时，允许添加少量的自来水。
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配气机构是柴油机的进、排气过程的控制机构。
【判断题】
联合调节器的主要功用是保证柴油机的启动和停机。
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柴油机在运用中，不允许随意损坏铅封松动最大供油止挡。
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组装差示压力计触针，触针距“0”刻线25mm，然后紧固好接头螺母及触针螺母。
【判断题】
当机油压力达80kPa以上时，即可松开1QA，柴油机启动结束。
【判断题】
柴油机防爆安全阀由阀盖，阀杆，弹簧及密封圈组成。
【判断题】
辅助机油泵的功用是在柴油机启动前，向柴油机润滑系统的各摩擦面提供机油。
【判断题】
16V240ZJB型柴油机正常停机水温应在50-60~C之间。
【判断题】
启动柴油机前启动机油泵先工作45--60s，使柴油机各部在初步具备良好润滑条件下才能启动。
【判断题】
使用万用表测量电压时，表笔应与电路串联。
【判断题】
柴油机启动后，松开1QA后又停机是因为经济电阻Rdls断路或1--2YJ未接通。
【判断题】
DF4型内燃机车采用交一直流电传动装置。
【判断题】
闭合5K和8K时，GFC线圈和FLC线圈得电。
【判断题】
DF4B型感应子励磁机的励磁绕组和电枢绕组都装在定子上。
【判断题】
运行中，油压继电器1--2YJ故障后，可短接两个油压继电器维持运行。
【判断题】
运行中突然卸载，7XD、4XD亮，则为主电路发生接地。
【判断题】
联合调节器电磁联锁DLS是用于控制柴油机自动停止工作的装置。
【判断题】
单阀用来单独操纵机车的制动，保压或缓解。
【判断题】
DF4B型机车的空气压缩机，由独立的直流电动机单独驱动。
【判断题】
JZ--7型制动机采用了二压力与三压力混合型式的分配阀。
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风源部分主要由空气压缩机、安全阀、油水分离器、调压器、总风缸等组成。
【判断题】
单阀有单独缓解位、运转位、制动区、全制动位四个作用位置。
【判断题】
中继阀接受自阀的控制而直接操纵制动管压力变化，从而使列车制动、保压或缓解。
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中继阀由双阀口式中继阀和总风遮断阀、管座三部分组成。
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工作风缸充气止回阀、控制制动管向工作风缸单向充气。
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消除工作风缸和降压风缸的过充压力是分配阀副阀部主要功用之一。
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作用阀管座上连接由总风缸管、制动缸管和通往变向阀的作用管。
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更换风笛膜片时，应卸下风管后盖，换上新膜片，然后鸣笛试验。
【判断题】
DF4B型机车转向架通过最小曲线半径为145m。
【判断题】
DF4B机车转向架一系悬挂弹簧装置的主要作用是缓和来自线路的冲击，能使机车在运用速度范围内平稳运行。
【判断题】
DF4B型客运机车运行速度为120km／h。
【判断题】
DF4B型采用的旁承，主要由上、下摩擦板，橡胶弹簧，球面座及球头等组成。
推荐试题
【判断题】
经营活动产生的现金流量最能反映企业获取现金的能力
【判断题】
在不存在现金等价物情况下，现金流量表中，“现金及现金等价物净增加额”与资产负债表中的“货币资金”期末、起初余额的差额相等
【判断题】
采用直接法编制经营活动产生的现金流量时，一般以营业收入为起点调节与经营活动有关项目的变动，计算出该项目
【判断题】
用银行存款购买两个月内到期的国债,不会使现金流量表中现金净流量发生增减变动
【判断题】
现金流量表的分析填列法是直接根据资产负债表、利润表和有关会计科目明细账的记录分析计算出现金流量表各个项目的金额，据此编制现金流量表的方法
【判断题】
为了清晰反映构成所有者权益各组成部分当期的增减变动情况，所有者权益变动表采用矩阵形式列示
【判断题】
销售净利率是20%，资产周转率是1次，权益乘数是2，则净资产收益率是40%
【判断题】
一般认为，资本保值率越高，表明企业的资本保全状况越好，所有者权益增长越快，债权人的债务越有保障
【判断题】
如果企业的负债资金的利息率低于其资产报酬率，则提高资产负债率可以增加所有者权益报酬率
【判断题】
杜邦分析体系是利用各主要财务比率之间的内在联系，综合分析企业财务状况的方法。建立财务分析指标体系
【判断题】
沃尔比重评分法是将选定的财务比率用线性关系联系起来，并分别给定各自的分数比重，然后通过与标准比重进行比较，确定各项指标的得分及总体指标的累积分数，从而对企业的信用水平做出评价的方法
【填空题】
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1 In our class,most discussions and activities take place in assigned small groups,These groups provide a supportive and safe environment that （） learning
【填空题】
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9 As the finance ministry rejected the defor its "lack of clarity",it[ ]complaint with the Europear Commission that this deal was against the law
【填空题】
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5 State governments and the colleges themselves have [ ] financial help to students with special abilities and those with financial needs
【填空题】
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10 Dogs cannot distinguish the color of trafficlights, so the master must make the decision of when it is safe to [ ] across the road
【填空题】
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6 The committee agreed that his papers
[ ] a wider circulation because of their essential and fundamental interest to a larger audience.
【填空题】
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1 Because women often restrict their diet
In an effort to control weight,they may
Not consume enough iron-rich food and
( ) experience an iron Deficiency.
【填空题】
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8 Americans defend the right to obtain a gun and they have[ ] been willing to turn a blind eye to the harm that people owning guns have caused
【填空题】
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7 The anger and frustration [ ] by the local people who do not understand what is happening to them will be a terrible and dangerous force
【填空题】
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2 Some reform advocates ignore the impact of
Class size on student achievement,and they
are ( ) what they call as a Priority:teacher effectiveness.
【填空题】
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3 Because of easy access to the Internet,the
New breakthrough tq create something
Truly creative ( ) happen anytime now.
【填空题】
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4 Indeed,if teachers want to( ) how far students might get in life, a better measurement than grades might be how hard the students try.
【填空题】
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5 Nature has( ) these animals ( ) a capacity for not showing Fear.
【填空题】
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6 During the weeks of discussion,delegations
from groups who are interested in the
Resolution may call on representatives to
( ) their point of view.
【填空题】
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7 Plato was a superb writer,and his works are
Part of the world’s great literature.Most of
His existing work is ( )Dialogs and letters.
【填空题】
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8 Young people should enter into a broad
Flexible training program,through which
They can learn a lot and be ( ) their future careers.
【填空题】
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9 The young man is very happy and proud to
be ( ) the old professor because he always feeIs great when talking With him.
【填空题】
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10 One day they passed more than 20 villages ( ),and some of these are Said to have stretched for six miles or more.
【填空题】
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7 Being asingle parent,there is no way for her
to ( ) the time and energy she has
devoted to her children for the past 10 years.
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8 It is essential that you start by listening because one of the main ( ) teenagers and their parents face in forming positive relationships is that neither listens to the other.
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9 We all know the dangers of an earthquake: the ( ) to buildings,the troubles can be caused by falling trees,and the terror occurs when the earth actually opens uip.
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10 Not until recently have we realized that the increasing world population may lead to a potential gloomy ( ) for humanity starvation.
【填空题】
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2 It is the development strategy/of the company to ( ) its overseas expansion in order to take a slice of the world market
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3 Nearly six million people go to see the Mona
Lisa every year,attracted by the ( )of her smile.When you're not lodking at her, she seems to be smiling;when you look at her,she stops.
【填空题】
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4 To live with a family whose native language is English is the ideal way to further improve one's English and to gain ( )into its culture.
【填空题】
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5 There is a real need to ( ) academic
achievement in schools and help with the
development of a student's overall character.
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6 Einstein said his scientific discoveries grew
from his imagination rather than from( ),
reason and language.
