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【填空题】
19.轴温报警器是一种车载监测___温度变化,超温报警的装置。___
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【填空题】
20.轴报器的中修周期与客车____周期相同。___
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21.TKZW-1T型轴报器跟踪报警温度是____。___
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22.三相感应电支机常用的起动方式有___起动和降压起动等两种。___
【填空题】
23.25G型客车电气设备按电压等级分为____V、220V和48V三类。___
【填空题】
24.具有安装客车发电机和蓄电池的固定设备,但暂时未安装的客车叫_____。___
【填空题】
25.客车电动水泵由直流电动机的循环___组成。___
【填空题】
26.凡实行定期检修并需分解的蓄电池,应首先进行一次部分容量的放电,叫____。___
【填空题】
27.利用晶体管电路把直流电转变为交流电,这种对应于整流的逆向过程称为_____。___
【填空题】
28.万有表使用完毕后,应将转换开关置于___档。___
【填空题】
29.一般万用表主要由表头、测量线路和___组成。___
【填空题】
30.低压电器按照它所控制的对象不同,可分为低压配电电器及___电器两种。___
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31.通常规定兆欧表的额定转速为____r/min。___
【填空题】
32.将电气设备与零线相连叫___。___
【填空题】
33.把数字信号转换___的装置称为D/A转换器。___
【填空题】
34.电工常用的绝缘材料按其化学性质的不同,可分为___绝缘材料、有机绝缘材料和混合绝缘材料三种。___
【填空题】
35.激磁线端反接会造成KP-2A型控制箱发电机___。___
【填空题】
36.空调机组的主要噪声来自_____和风机。___
【填空题】
37.J5型发电机及恒压装置的整定电压是___V。___
【填空题】
38.25型空调客车车下配线包括输送三相交流电的主线、___及车下各负载支线等。___
【填空题】
39.最高工作温度保险丝的额定电流是指___。___
【填空题】
40.25型客车电压为____三相四线制。___
【填空题】
41.客车上使用的逆变器,其三极管的连接方式为___。___
【填空题】
42.电流互感器是配合电流表,继电保护线圈来反映___的一种特殊变压器.___
【填空题】
43.通常所说的表头灵敏度是指使表针自零点___时的电流值。___
【填空题】
44.电流所通过的路径称___。___
【填空题】
45.电路是由电源、负载、开关和___四个基本部分组成。___
【填空题】
46.电磁式交流继电器主要由____、触头部分和反力部分组成。___
【填空题】
47.在可控整流电路中,触发电路必须和____同步。___
【填空题】
48.直流电源一般由电源变压器、____、滤波器和稳压电路组成。___
【填空题】
49.在可控整流电路中,触发电路必须和____同步。___
【填空题】
50.车辆空调制冷系统中,单位时间内所摄取的热量称为___。___
【填空题】
51.25型空调客车的供电装置采用____形式。___
【填空题】
52.电感线圈在电路中具有通直流___的作用。___
【填空题】
53.交流接触器具有远距离操作功能、_____和欠压保护功能,但不具备过载保护功能。___
【填空题】
54.空调装置电气部件与壳的绝缘,在相对湿度小于60%时电阻应大于_____,若低于此值,可采用断开有关线路分段测量方法,找到漏电部位后更换或加强绝缘性能下降的元件。___
【填空题】
55.目前绝大部分空调装置的进出风温差一般在Δt=_____。___
【填空题】
56.客车电气装置由供电部分、配电、输电和连接部分及____器部分组成。___
【填空题】
57.三相鼠笼式电动机采用降压起动的目的是___。___
【填空题】
58.直流电源一般由电源变压器、___、滤波器和稳压电路组成。___
【填空题】
59.绝缘体是指常态下几乎不能传导___的物体。___
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( ) 26. Where does the writer of "The little Prince" come from? A.England. B.France. C.America. D.China.
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( ) 27. What does the prince do after the fox tells him a secret? A.He cares more about a flower and a sheep. B.He meets many more strange adults on other planets. C.He realizes his love for the rose and he goes back to his planet.   D.He discovers interesting things such as a snake, other roses and a fox
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________. A.the adult world B.the planet B -612 C.a rose and a fox D.the adventure of a young prince
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( ) 29. What is the writer's main purpose(目的)in writing this passage?    A.To tell the readers his life story.    B.To tell people what kind of person his father was.    C.To tell the readers what present he got from his father.    D. To let people know how poor he was.
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( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
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( ) 31. What would someone learn from this passage?    A.How to live by oneself. B.How to stand on one's own feet.    C.What a good father should do. D.What the self-important is like.
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( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
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( ) 33. Why did Natalie Smith pay for the six cars behind her? A. She had seven tickets. B. She hoped to please others. C. She knew the car drivers well. D. She wanted to show kindness.
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( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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( ) 35. Who came up with the phrase according to the passage? A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
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( ) 36. What can we infer from the last paragraph? A. People should practice random kindness to those in need. B. People who receive kindness are likely to offer it to others. C. People should practice random kindness to strangers they meet. D. People who receive kindness are likely to pay it back to the giver.
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( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
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( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
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( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
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( ) 40. The best title of the passage is ___________. A. Rivers in Cities B. The importance of Rivers C. Transportation D. Natural Resources
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