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[单选题]RL串联电路与直流电源E接通瞬间,电路中电流I、电感两端电压UL及电阻 R之间的关系是( )。
A. I = 0, UL = 0
B.I = 0,`UL= E
C. I = E/R, `U1` = IL
D. I = E/R, UL = E

热门试题:

[单选题]公民、法人或者其他组织对行政机关实施行政许可,享有( )。
A.陈述权、申辩权
B.申请仲裁权
C.要求裁决权
D.民事诉讼权
[多项选择]为了有效地进行质量管理和质量控制,企业应建立质量体系,质量体系通常包括()等部分。
A. 质量策划
B. 组织结构
C. 程序
D. 过程的资源
E. 质量改进
[不定项选择]锅炉过热器的材料大多采用一些含有()的、具有良好高温强度、能耐热的合金钢制造。
A. 镍
B. 铬
C. 钼
D. 钒
[填空题] 普速铁路全封闭区段:列车运行途中,司机发现有闲杂人员时,应鸣笛警示,视情况采取( )措施,并向车站值班员(列车调度员)报告。
[单项选择]有“软肾病”之称的是()
A. 羊肠毒血症
B. 鸭瘟
C. 狂犬病
D. 牛流行热
E. 犬瘟热
[判断题]提速道岔各部分轨距均为1435mm。( )
A.正确
B.错误
[多项选择]下列情形中,属于法律适用结果的是:( )
A. 北京人民法院作出的以强奸罪判处李某有期徒刑7年的判决
B. 上海市某区人民检察院作出的高某故意伤害情节显著轻微不构成犯罪,依法不追究刑事责任的不起诉决定
C. 南昌市某区公安局依据《治安管理处罚条例》对王某作出行政拘留7日的处罚决定
D. 合肥市市委作出的关于严肃处理某几个党员领导干部经济问题的决定
[单选题]有装卸作业的线路,停留车辆位置距离警冲标不足 20m 时,防护信号应该设在与( )相齐处。
A.停留车辆
B.警冲标
C.出站信号机
D.道岔
[单选题]《安全生产法》规定,矿山、金属冶炼、建筑施工、道路运输单位和危险物品的( )单 位,应当设置机构或者配备专职人员。
A.生产、运输、储存
B.生产、储存、使用
C.生产、运输、使用
D.生产、经营、储存
[单项选择]Marketing is all around us. We are surrounded by businesses, like Apple Computer Inc., that carry good products grown or manufactured and prepared for sale. We also see many businesses that offer services, benefits or satisfactions that improve the personal appearance, health, comfort, or peace of mind of their users. Some products are used to make services available, such as the tools an auto-mechanic uses in servicing a car.
Marketing starts with people. Marketing businesses find out what customers want and work to supply those goods and services.
Getting products from farms and factories to the people who will use them involves marketing at each step. Suppose a farmer recognizes the need for popcorn and decides to grow some. When the popcorn is harvested and ready for marketing, it may go to one of many places, depending on whether it is to be stored or used right away. Marketing occurs at each step: when the farmer sells it, for example, to a storage warehouse and when th
A. Marketing does not include storing goods on the way from producers to consumers.
B. Marketing does not include handling goods on the way from producers to consumers.
C. Marketing does not include moving goods from producers to consumers.
D. Marketing is much broader than distribution.
[单选题]限制人身自由的行政处罚权只能由( )行使。
A.人民法院
B.公安机关
C.国务院
D.人大常委会
[单选题]外国旅客凭()乘机。
A. 居留证
B.旅行证
C.有效护照
D.以上全对
[判断题]《铁路客运站车厕所环境卫生管理暂行办法》中,厕所地面整洁,无泥印、无杂物。
A.正确
B.错误
[单项选择]古希腊哲学家柏拉图说:“为着品德而去眷顾一个情人,总是一件很美的事。”他的意思是,在爱情中起主导作用的应该是( )
A. 人的姿色和容貌
B. 人的精神世界和道德面貌
C. 人的自然属性和生理需要
D. 人的金钱、权势和社会地位
[判断题]根据广铁施工发〔2021〕100 号,纳入“邻近营业线施工安全监督计划”的B、C类施工,施工单位均应设置驻站联络员和现场防护员。
A.正确
B.错误
[多选题]根据《关于推进农村商业银行坚守定位 强化治理 提升金融服务能力的意见》,农村商业银行应确保( )和( )两类贷款增速和占各项贷款比例稳中有升,辖内农户和小微企业建档评级覆盖面和授信户数有效增加。
A.涉农
B.三农
C.小微企业
D.小微客户
[单项选择]As in the field of space travel, so in undersea exploration new technologies continue to appear. They share a number of similarities with each other—as well as some important differences.
Manned submersibles.(潜水器), like spaceships, must maintain living conditions in an unnatural environment. But while a spaceship must simply be sealed against the vacuum of space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.
In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other haled, men paved (铺路) the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.
One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles—particularly ROVs—operate. at the
A. more interesting
B. more attractive
C. more demanding
D. more dangerous
[单选题]观察各种死亡原因所占的比重大小,最好绘制的图形为
A.直条图
B.半对数线图
C.普通线图
D.圆图
E.直方图
[简答题]25Hz轨道电路设备的基本组成。
[判断题]角联风路的风向容易发生逆转是因为该风路的风阻太大。
[单项选择]长时间接触渗透液对某些人的皮肤会产生过敏现象,其原因是()
A. 渗透液中含有有毒物质
B. 渗透液中含有油性液体的刺激作用
C. 渗透液中含有麻醉性物质
D. 以上都不对
[判断题]新铣床验收中发现有几何精度误差,操作工作应负责进行修复。
A.正确
B.错误
[单项选择]有关江河水系的采样要求和检测,哪个不正确()。
A. 污染河段至少包括3采样断面
B. 布点根据江河宽度而定
C. 采样至少在丰水期、枯水期、平水期各采一次
D. 重金属在水质中不易检出,故底质监测没有必要
E. 可用生物监测方法评价水的污染状况
[单项选择]大城市城市每平方米土地年税额为( )。
A. 0.6~12元
B. 0.9~18元
C. 1.2~24元
D. 1.5~30元
[单选题]“在科学上没有平坦的大道,只有不畏劳苦沿着陡峭山路攀登的人,才有希望达到光辉的顶点。”这句话说明( )。
A.理想和现实是矛盾的
B.立志当高远
C.艰苦奋斗是实现理想的重要条件
D.实现理想的过程中要敢为人先
[单选题]途中会车时,严禁将头探出窗外,并须注意邻线列车运行情况,接近列车尾部应( )。
A.呼唤
B.鸣笛
C.加强瞭望
D.提高警惕
[简答题]党支部议事应当召开支部委员会或者支部党员大会,按照什么程序进行?
[单选题]天窗分为施工天窗和维修天窗。施工天窗线桥大中修及大型养路机械作业时不应少于()分钟。
A.90
B.120
C.180
D.240
[判断题]安装漏电流动作保护器以后,可以取消原有的接地保护或接零保护。( )
A.正确
B.错误
[多选题]下列关于我国期货交易所的表述中,正确的有( )。
A.交易所自身并不参与期货交易
B.会员制交易所是非营利性机构
C.交易所参与期货价格的形成
D.交易所负责设计合约、安排合约上市
[填空题]Scientists have discovered evidence of the world’s earliest animals, (36) back 635 million years, before the end of the last ice age. Scientists have found evidence of the world’s earliest multicellular animal life, sponges 408 million years older than the oldest known dinosaur remains, 100 million years older than when scientists thought the first animal life (37)
Earth scientist Gordon Love of the University of California, Riverside (38) the team that made the discovery. He says the 635-million-year-old fossils were found in sedimentary rocks in a (39) in southern Oman and are in the form of steroids, essential biochemicals in the cell membranes of sponges.
"Some of the natural products produced by sponges produce very (40) structures," said Love. "Even when they get (41) for hundreds of millions of years in sediments. Basically when the structures of the molecules get tweaked a little bit, we can still
[单选题]室外构架上工作,在作业人员上下铁架或梯子上,应悬挂(  )的标示牌。
A.“禁止攀登,高压危险!”
B.“在此工作!”
C.“止步,高压危险!”
D.“从此上下!”
[判断题]《110千伏及以下配电网规划技术指导原则》4.11可转供电线路是指有联络关系的中压线路同时处于最大负荷运行方式下,其中某一回线路的变电站出线开关故障或计划停运时,其全部负荷可通过不超过两次(含两次)的转供电倒闸操作,转由其余线路供电,则称该线路称为“可转供电线路”。()
A.正确
B.错误
[单选题]第一次在我行进行抵押的押品,需要通过( )流程确定押品价值。
A.内部评估
B.外部评估
C.重评
D.复评验证
[判断题] 测定水样中的油含量时,收集萃取液的容量瓶急用时可用无水乙醇冲洗。( )
A.正确
B.错误
[判断题]内毒素抗原性强,可刺激机体产生抗毒素,经甲醛液处理可脱毒后制成类毒素。
A.正确
B.错误
[单选题]关于肾描述错误的是
A.右肾比左肾略高;
B.自上而下出入肾门的是肾动脉、肾静脉和肾盂;
C.第12肋斜过左肾后面中部;
D.由前向后出入肾门的是肾静脉、肾动脉和肾盂;
E.肾被膜由外向内有纤维囊、脂肪囊、肾筋膜

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