[单选题]带电阻性负载的单相半波可控整流电路中,晶闸管承受的最大正向电压为_________,最大反向电压为_________. ( )A.(√2)U₂、(√3)U₂ B.(√2)U₂、(√6)U₂C.(√2)U₂、(√2)U₂ D.(√3)U₂、(√6)U₂
[问答题]直流发电机按励磁方法来分类,分为 四种.
[单选题]在典型的控制图上,产品质量特性落在[LC.,UCL]之外的概率为( ). A.99.73% B.1% C.0.27% D.0.135%
[单选题]下面哪一部电影不属于知识分子精英意识形态的作品:( )A.《黄土地》B.《一个与八个》C.《孩子王》D.《小武》
[单选题]创立马尔科姆波多里奇国家质量奖的第一步是建立一套评价准则,这套准则被称为( ). A.提高绩效标准 B.卓越绩效标准 C.第一绩效标准 D.管理绩效标准
[单选题]大便潜血试验前3天可食用A.大白菜B.猪肝C.菠菜D.牛肉
[单选题]通常所说的数控系统是指( ).2.0 分A、主轴驱动和进给驱动系统B、数控装置和驱动装置C、数控装置和主轴驱动装置D、数控装置和辅助装置
[单选题]土方开挖放坡的目的是( ).A、施工方便B、排水方便C、防止流砂D、防止土壁塌方
[名词解释]公共关系是什么
[单选题]钢筋的主要机械性能不包括( ) A. 抗拉性能 B. 塑性变形 C. 冷弯 D. 抗剪性能
[单选题]用公式△E=Cv△T(式中Cv为定容摩尔热容量,?ノ?气体摩尔数)计算理想气体内能增量时,此式 A、 只适用于准静态的等容过程 B、 只适用于一切等容过程 C、 只适用于一切准静态的过程 D、 适用于一切始末态为平衡态的过程
[多选题]我国当前社会保障体系障碍包括( )等方面. A、 关于社会保障体系的覆盖范围 B、 有关社会保障属地管理原则 C、 关于保险征收方式和计发方法 D、 关于小时工、兼职工的法律地位
[单选题]用友报表系统中,不属于账务取数函数的是( ).A、 QC( )B、 PTOTAL( )C、 FS( )D、 LFS( )
[多选题]为正确制定决策方案,所收集的信息应力求A.系统 B.完整C.全面D.及时
[多选题](阅读理解题)Dick lived in England. One day in January he said to his wife, I.m going to fly to New York next week because I.ve got some work there. Where are you going to stay there? his wife asked. I don.t know yet. Dick answered. Please send me your address from there in a telegram (电报), his wife said. All right, Dick answered.He flew to New York on January 31st and found a nice hotel in the center of the city. He put his things in his room and then he sent his wife a telegram. He put the address of his hotel in it.In the evening he didn.t have any work, so he went to a cinema. He came out at nine o.clock and said, Now I.m going back to my hotel and have a nice dinner.He found a taxi (出租车) and the driver said, Where do you want to go? But Dick didn.t remember the name and address of his hotel.Which hotel are my things in? he said, And what am I going to do tonight? But the driver of the taxi did not know. So Dick got out and went into a post office. There he sent his wife another telegram, and in it he wrote, Please send me my address at this post office.(1). Dick flew to New York because ___.( ) A、 he went there for a holiday B、 he had work there C、 he went there for sightseeing (观光) D、 his home was there(2). Why did his wife want a telegram from him() A、 Because she didn.t know his address yet B、 Because she wanted to go to New York, too C、 Because she might send him another telegram D、 Because she couldn.t leave her husband by himself in New York(3). Where did Dick stay in New York() A、 In the center of the city. B、 In a hotel. C、 In a restaurant. D、 At his friend.s house.(4). Who would send him the name and address of his hotel() A、 The manager (经理) of his hotel. B、 The police office. C、 The taxi driver. D、 His wife.(5). Which of the following is not true() A、 Dick stayed at a nice hotel in the center of the city. B、 Dick went to New York by plane. C、 Dick forgot to send his wife a telegram. D、 Dick wanted to go back to his hotel in a taxi.
[问答题]影响化学消毒剂作用的因素.
[多选题]在做项目演示时,需要呈现( ).A、成本盈利分析B、市场分析调研C、利润分红期许D、经营管理模式
[单选题]如图所示纸张承重试验,纸张结构受到的力是( )A.拉力B.压力C.弯曲力D.扭转力
[问答题]1988 年2月10日 ,8岁男童裴勇在路过天山区某一居民楼下时,被该楼居民曹斌从楼上扔下的破花盆砸中头部.曹斌及裴勇之父随即送裴勇前往医院治疗. 2月13日该医院作出诊断,裴勇头颅顶部颅骨凹陷性骨折.治疗半月后,裴勇基本恢复正常,曹斌为此支付医疗费四百余元. 1994年1月初,裴勇出现阵发性昏迷,此症状时有发生.同年3月经医院作了检查后,诊断为“颅骨骨折后未排除外伤癫痫”. 1994年5月,裴勇的父亲代理其向县人民法院提起诉讼,称裴勇因被曹斌砸伤后,头部未痊愈而头痛、昏倒,要求曹一次性给付医疗费等3万元.而曹斌则辩称,伤害发生后,已对裴勇进行了治疗且裴勇已基本恢复正常,自己当时已支付有关费用,裴父一直未有异议,现时过5年,裴又向其索赔,诉讼时效已过,法院应驳回其诉讼请求. 本案如何处理
[单选题]大多数酶的化学本质是( )A、 多糖B、 脂类C、 核酸D、 蛋白质
[单选题]Tom ______ to America with his parents. They_____ back in two weeks.( ) A、 have gone; will come B、 has gone; will come C、 have been; have come D、 have been; come