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[单选题]( )按一定时间间隔来控制电动机的工作状态称为时间控制原则。
A.电流继电器
B.时间继电器
C.位置开关
D.以上三者均可

热门试题:

[单选题]五行中“金”的特性是()
A.炎上
B.润下
C.稼穑
D.曲直
E.从革
[单项选择]

Text 1
Millions of families sat down in their living rooms one evening last August to watch a live Madonna Concert from France, telecast on the cable network Home Box Office. Because Madonna. is such a huge international star--and because the telecast was heavily promoted and aired in prime time on a weekend--millions of children certainly watched with their parents.
What happened on all those screens was that Madonna repeatedly used the one obscene word that has been routinely barred from the public airwaves.
We live in an anything - goes age, so the show’ s witless and purposely vulgar content was not surprising. The language itself was nothing that has not been heard in movies or on cable - TV comedy specials. The surprising thing was that so few parents called HBO to object. A spokesperson for the network said the complaints" were not by any stretch of the imagination overwhelming"--and that the Madonna con cert was the highest -
A. It is an anything - goes age
B. Is Madonna a huge international star
C. The children are watching
D. Programes on the cable network are out - dated

[单选题] 公安机关民警在对校园进行监督检查时,监督检查应当制作( )。
A. 《询问笔录》
B. 《检查笔录》
C. 《监督笔录》
D. 《讯问笔录》
[判断题]车站各营业处所除应有《客规》规定的揭示内容外,为方便旅客,行李包裹承运处还应有行包托运须知,行包包装标准,禁止托运和夹带违禁品的图例或文字说明,服务项目等。
A.正确
B.错误
[单选题]导致成年人牙劈裂而丧失的主要疾病是 ( )
A.牙隐裂
B.楔状缺损
C.遗传性乳光牙本质
D.深龋
E.畸形中央尖
[单项选择]下列哪项属于信访法的特点
A. 具有一定的灵活性
B. 问卷回收率较高
C. 可以控制填写问卷的环境
D. 有较高的匿名保证
E. 问卷有效率较高
[填空题]110.1954年9月,___第一次会议在北京举行。会议的召开,标志着___正式确立。
[单项选择]某安装工程以人工费为取费基础计算建筑安装工程造价。已知该工程直接工程费为50万元,直接工程费中人工费为15万元;措施费为4万元,措施费中人工费为1万元;间接费费率为50%,利润率为30%,综合计税系数为3.41%,则该工程的含税造价为( )万元。
A. 64.1142
B. 68.2506
C. 69.0779
D. 83.3485
[单项选择]The worst thing about television and radio is that they entertain us, saving us the trouble of entertaining ourselves.
A hundred years ago, before all these devices were invented, if a person wanted to entertain himself with a song or a piece of music, he would have to do the singing himself or pick up a violin and play it. Now, all he has to do is turn on the radio or TV. As a result, singing and music have declined.
Italians used to sing all the time. Now, they only do it in Hollywood movies. Indian movies are mostly a series of songs and dances wrapped around silly stories. As a result, they don’t do much singing in Indian villages anymore. Indeed, ever since radio first came to life, there has been a terrible decline in amateur singing throughout the world.
There are two reasons for this sad decline: One, human beings are astonishingly lazy. Put a lift in a building, and people would rather take it than climb even two flights of steps. Similarly, invent a machine tha
A. only sing songs in Hollywood
B. are no longer fond of music
C. only sing and dance in villages
D. don’t sing much nowadays
[判断题]三极管工作在饱和状态时,发射极、集电极均正偏。
[单选题]人们在实践中形成的对人生目的和意义的根本看法和态度是( )。
A.世界观
B.自然观
C.人生观
D.价值观
[单选题](  )是指项目投资退出的资金先返还至基金投资者,当投资者收回全部投资本金后,再按照约定的门槛收益率(如有)向基金投资者分配门槛收益。
A.瀑布式的收益分配体系
B.业绩报酬
C.追赶机制
D.回拨机制
[单选题]750kV及以下电压等级输电线路“三跨”金具应按照施工验收规定逐一检查压接质量,并按照“三跨”段内耐张线夹总数量( )的比例开展X射线无损检测。
A.10%
B.20%
C.30%
D.40%
[判断题]单相半波可控整流电路中,控制角越大,输出直流电压的平均值越大
A.正确
B.错误
[单选题]钢轨接头应采用相对式联结方式。在每节轨上,相差量不应大于()mm,并应前后、左右抵消,在两股钢轨上累计相差量最大不得大于15mm。
A.5
B.3
C.8
D.10
[判断题]倾斜长壁采煤法巷道布置主要特点是取消了上(下)山,简化了井下的巷道系统。( )
A.正确
B.错误
[单项选择]制作奶香味型菜肴的原料以()为主。
A. 酸乳
B. 牛乳及其制品
C. 马乳及其制品
D. 羊乳及其制品
[单选题]对于软性散光角膜接触镜的片标描述正确的是( )
A.片标是描述散光轴位的定位的
B.片标通常位于6点钟方向或3,9点方位
C.常见片标通常用短线或圆点表达
D.以上都对
[填空题]设凸形竖曲线范围内中桩的设计高程Z、切线高程T和纵距y的单位均为m,则计算公式是()。
[简答题]CTAIS系统中税收会计由哪几部分组成?
[单项选择]易发生挤压综合征的挤压伤部位是
A. 头部
B. 胸部
C. 手和前臂
D. 大腿和臀部
E. 足和小腿
[填空题]反应器的总温升是指床层最高点温度与()的差值。
[判断题]偏差是指真值与实验值之间的差值。( )
A.正确
B.错误
[单项选择]字母B的ASCII码是98,那么ASCII码121代表字母()
A. C
B. w
C. x
D. y
[简答题]试述蜡式节温器的工作原理。
[单项选择]项目参与方出现纠纷或意见不一致引起的风险是( )
A. 社会风险
B. 信用风险
C. 行为风险
D. 组织风险
[单选题]飞机的最大起飞重量指
A.飞机离地时的重量
B.飞机开始滑行时的重量
C.飞机开始起飞滑跑时的重量
[多选题]《巴塞尔新资本协议》要求银行信息披露的范围包括( )。
A.资本充足率
B.资本构成
C.风险敞口及风险管理策略
D.盈利能力
[判断题]过失投放危险物质而致人重伤、死亡的,按照过失致人重伤罪、过失致人死亡罪定罪处罚。
A.正确
B.错误
[单选题]配电站的变压器室内工作,人体与10kV高压设备带电部分应保持()安全距离。
A.0.7m
B.1.0m
C.1.5m
D.3.0m
E./
F./
[填空题]病因是指_____疾病、决定疾病______的因素,它与疾病存在着___关系。
[多选题]民警韩某.张某日常巡逻,在巡逻到某一商户时发现店内发生争执,商贩说是由于白某使用假币而拒不退还自己找零的真币。韩某.张某对白某当场盘问.检查,发现其包内有不明来源的百元假币5张,遂决定将其带至派出所盘问。人民警察的下列做法不恰当的有:
A.民警韩某.张某可以当场盘问检查白某
B.民警对白某留置时间自询问时起超过48小时
C.对于批准继续盘问的,民警未通知白某的家属
D.对于不批准继续盘问的,民警应当立即释放被盘问人
[单项选择]My name is Mohsen. I am from Cario, but three weeks ago I said goodbye to my family and got on a plane to the U.S. Now 1 am studying at Cornell University in New York, and I live in the school.
School life is busy, but it is a lot of fun. I meet new people every day. It is a funny thing that everyone asks me the same question: How do you like here7
Well, it’s not that I don’t like coming to the U.S.; it’s just that a lot of things seem strange to me. For example, the language sounds different from the English I learned at home. And everybody talks so fast. Sometimes I become nervous (紧张的) and I don’t understand everything that people say to me. Worse, people never seem to understand me. I always have to say something two or three times. Now I work on my pronunciation (发音) to get people to understand me better and I believe that it has begun to get better. But, to tell you the truth, at times, I get very embarrassed(尴尬).
Mohsen is working hard at his pronunciation to ______
[判断题]《国家电网公司供电服务“十项承诺》中规范,装表接电期限:受电工程检验合格并办结相关手续后,非居民客户3个工作日内送电,居民客户5个工作日内送电。
A.正确
B.错误
[多项选择]罪责刑相适应原则的基本含义是()。
A. 重罪重罚
B. 轻罪轻罚
C. 罚当其罪
D. 罪刑相当
[多项选择]依照举报奖励办法的有关规定,下列()情形不予奖励。
A. 举报人实名举报,案件已被稽查,但举报人反映的问题稽查人员未发现需要补充稽查的
B. 纳税人已在被举报前将其税收违法问题向税务机关报告
C. 根据举报材料无法确定举报人员身份
D. 审计厅工作人员在审计纳税人后向税务机关举报
E. 举报人举报时稽查人员正在稽查的案件,举报人反映的问题稽查人员已发现
F. 在举报材料中写有真实姓名并经稽查后查证属实
[多选题]关于总、分工作票下列说法正确的是(____)。
A.总工作票上所列的安全措施应包括所有分工作票上所列的安全措施
B.总、分工作票在格式上与第一种工作票一致
C.分工作票的许可和终结,由分工作票负责人与总工作票负责人办理
D.几个班同时进行工作时,总工作票的工作班成员栏内,只填明各分工作票的负责人,不必填写全部工作班人员姓名
[多选题]高速道岔应加强( )位移观测,防止转换卡阻。
A.护轨
B.导轨
C.尖轨
D.心轨

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