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[多选题] 正弦交流电的最大值和有效值的大小与()无关。
A. 频率
B. 相位
C. 电压
D. 电流

热门试题:

[单项选择]关于促黄体生成素释放激素类似物,下列说法不正确的是()
A. 是九肽类似物
B. 促进雄鱼精子产生和成长
C. 促进雌鱼卵泡分泌雌激素
D. 使鱼类下丘脑释放促性腺激素
[单选题]鼻饲饮食时胃管插入深度为:( )
A.30—35cm
B.35—40cm
C.45—50cm
D.50—55cm
[单项选择]男,55岁。2天前弯腰搬运东西时出现下腹痛,随后出现肛门停止排便排气,无呕吐。既往有多年便秘病史。查体:全腹胀,左下腹尤甚,未扪及腹内肿块,肠鸣音亢进,直肠指检阴性。盐水灌肠只能进入200ml。首先考虑的诊断是()
A. 小肠急性扭转
B. 结肠肿瘤性梗阻
C. 乙状结肠扭转
D. 肠套叠
E. 肠系膜血管栓塞
[判断题]健美运动员平时采取“中量蛋白质,高碳水化合物,低脂肪”食谱。()
[判断题]当发现低压配电箱、金属计量箱箱体带电时,应断开总配电箱电源,查明原因,并作相应处理。
A.正确
B.错误
[单选题]文化是一个民族的魂,( )是民族团结的根脉。( )
A.思想认同
B.道德认同
C.宗教认同
D.文化认同
[单项选择]某用户为了生产与使用平衡,需设置气体贮罐,以解决短期频繁的用量波动。供气压力等于贮气罐设计压力,其压力一般需技术经济比较确定。已知供气压力P1=0.8MPa,用户使用压力P2=0.5MPa,环境温度为29℃,贮气量为3m3,则贮罐水容积为()m3
A. 11.1
B. 12.5
C. 17.4
D. 10.6
[填空题]接触网运行维护应根据环境、气候特点,针对( )、( ))、( )、( )、( )闪)、( )、( )、( )、( )等影响供电安全的外部环境因素,建立有效机制,减少对接触网设备运行安全的影响。 《普速铁路接触网运行维修规则》第二十六条)
[单选题]动车组自走行调车作业时,调车领导人为(),司机凭地面信号机的显示运行,不另设调车指挥人。
A.动车段调度员
B.动车所调度员
C.司机
D.地勤机械师
[单项选择]猪囊尾蚴寄生于()。
A. 犬的肠道
B. 家畜的肠道
C. 人和哺乳动物肠道
D. 人体和猪的各种组织脏器
E. 羊、牛等偶蹄动物的各种组织脏器
[填空题]铁路正线线路宜采用60N、75N廓形钢轨,上道后应及时打磨为 。
[单选题]施工阶段投资控制的目的是( )。
A.保证施工的顺利进行
B.确保投资项目的完成
C.确保投资目标的实现
D.确保在投资范围内完成工程
[单项选择]下列说法中,正确的一项是( )。
A. 创建好查询后,不能更改查询中的字段的排列顺序
B. 对已创建的查询,可以添加或删除其数据来源
C. 对查询的结果,不能进行排序
D. 上述说法都不正确
[判断题]在其他条件一定时,构件间不同的连接方式影响构件的耐火极限,尤其是对节点的处理方式,如焊接、螺钉连接、简支、现浇等方式。相同条件下,现浇钢筋混凝土梁板比简支钢筋混凝土梁板的耐火极限低。
A.正确
B.错误
[填空题]微信小程序通过 ( ) 搜索关键字、群分享、好友分享方式打开
[单项选择]受精卵何时着床:
A. Chadwick征
B. 蒙氏结节
C. Hegarsign
D. Braxton Hicks收缩
E. 乳腺增生
[多项选择]以下关于上网卡的说法正确的是?()
A. 数据卡更适合有移动办公需求的商旅客户
B. Mi-Fi更适合有支持WIFI终端的客户
C. 上网卡即数据卡
D. CPE更适合小商铺、租房一族等
[单项选择]“镇”这一名称最早出现于( )。
A. 北宋时期
B. 北魏时期
C. 唐朝时期
D. 清朝时期
[单选题]可控串补装置阻抗调解应优先采用自动操作方式;如果采用手动操作方式,应根据( )提供的操作顺序进行操作。
A.制造厂
B.技术部门
C.本单位
D.设备运维管理单位
[单项选择]在进行口对口人工呼吸时,约每()秒吹气一次,连续反复进行。
A. 1
B. 4
C. 10
[单选题]用单独制动阀进行制动,制动缸压力由零升至340kPa的时间不大于( )S。(DCL-32K连续式双枕捣固车检修规则4.3.4)
A.3
B.5
C.4
D.6
[单选题]斜道的宽度,单方向通行时,不应小于1m,双向通行时,不应小于()。
A.1.2m
B.1.5m
C.1.8m
[单选题]关于企业单独收取的包装物押金,下列消费税税务处理正确的是( )。
A.销售黄酒收取的包装物应并入当期销售额计征消费税
B.销售葡萄酒收取的包装物不并入当期销售额计征消费税
C.销售白酒收取的包装物并入当期销售额计征消费税
D.销售啤酒收取的包装物应并入当期销售额计征消费税
[单项选择]I ( ) if you could tell me anything in this respect.
A. appreciate it
B. should appreciate
C. should appreciate it
D. really appreciate
[判断题]实战演练时,要安排人员利用技术手段对整个演练行动进行有效监控,对演练中出现危险情况,要迅速做出应急处理或暂停训练。()
A.正确
B.错误
[单选题]车站作业计划包括班计划、( )和调车作业计划。
A.阶段计划
B.列车出发计划
C.列车运行计划
D.专用线取送计划
[单选题]在规定条件下当火焰靠近油品表面的油气和空气混合物时即着火并持续燃烧至规定时间所需的最低温度称为( )。
A.燃点
B.自燃点
C.闪点
D.沸点
[判断题]CRH2A 型动车组正常情况下,只能有两个受电弓升起。【一】( )
A.正确
B.错误
[多选题]在《20kV及以下变电所设计规范(GB50053-2013)》中,当符合下列条件之一时,变电所宜装设两台及以上变压器( )。
A.有大量一级负荷或二级负荷时
B.季节性负荷变化较大时
C.集中负荷较大时
D.有冲击负荷时
[单选题] 宪法的修改,由全国人民代表大会常务委员会或者(??)以上的全国人民代表大会代表提议。
A.:五分之一
B.:三分之一
C.:三分之二
D.:五分之三
[单选题]用机械牵引电缆时,牵引绳的安全系数不得小于()。
A.2
B.3
C.2.5
D.2.8
E.略
F.略
[单选题]The social sciences are flourishing.As of 2005,there were almost half a million professional social scientists from all fields in the world,working both inside and outside academia.According to the World Social Science Report 2010,the number of social-science students worldwide has swollen by about 11%every year since 2000.Yet this enormous resource in not contributing enough to today’s global challenges including climate change,security,sustainable development and health.(1)______Humanity has the necessary agro-technological tools to eradicate hunger,from genetically engineered crops to arificial fertilizers.Here,too,the problems are social:the organization and distribution of food,wealth and prosperity.(2)____This is a shame—the community should be grasping the opportunity to raise its influence in the real world.To paraphrase the great social scientist Joseph Schumpeter:there is no radical innovation without creative destruction.Today,the social sciences are largely focused on disciplinary problems and internal scholarly debates,rather than on topics with external impact.Analyses reveal that the number of papers including the keywords“environmental changed”or“climate change”have increased rapidly since 2004,(3)____When social scientists do tackle practical issues,their scope is often local:Belgium is interested mainly in the effects of poverty on Belgium for example.And whether the community’s work contributes much to an overall accumulation of knowledge is doubtful.The problem is not necessarily the amount of available funding(4)____this is an adequate amount so long as it is aimed in the right direction.Social scientists who complain about a lack of funding should not expect more in today’s economic climate.The trick is to direct these funds better.The European Union Framework funding programs have long had a category specifically targeted at social scientists.This year,it was proposed that system be changed:Horizon 2020,a new program to be enacted in 2014,would not have such a category,This has resulted in protests from social scientists.But the intention is not to neglect social science;rather,the complete opposite.(5)____That should create more collaborative endeavors and help to develop projects aimed directly at solving global problems. [A]It could be that we are evolving two communities of social scientists:one that is discipline-oriented and publishing in highly specialized journals,and one that is problem-oriented and publishing elsewhere,such as policy briefs. [B]However,the numbers are still small:in 2010,about 1,600 of the 100,000 social-sciences papers published globally included one of these Keywords. [C]the idea is to force social to integrate their work with other categories,including health and demographic change food security,marine research and the bio-economy,clear,efficient energy;and inclusive,innovative and secure societies. [D]the solution is to change the mindset of the academic community,and what it considers to be its main goal.Global challenges and social innovation ought to receive much more attention from scientists,especially the young ones. [E]These issues all have root causes in human behavior.All require behavioral change and social innovations,as well as technological development.Stemming climate change,for example,is as much about changing consumption patterns and promoting tax acceptance as it is about developing clean energy. [F]Despite these factors,many social scientists seem reluctant to tackle such problems.And in Europe,some are up in arms over a proposal to drop a specific funding category for social-science research and to integrate it within cross-cutting topics of sustainable development. [G]During the late 1990s,national spending on social sciences and the humanities as a percentage of all research and development funds-including government,higher education,non-profit and corporate-varied from around 4%to 25%;in most European nations,it is about 15%. 1选?
A.A
B.B
C.C
D.D
E.E
F.F
G.G
[多项选择]下列各项中,属于借款费用的有:
A. 借款辅助费用
B. 借款利息
C. 发行公司股票的佣金
D. 发行公司债券所发生的折价本期摊销金额
E. 外币借款发生的汇兑差额
[单项选择]《淮北矿业关于2016安全生产体系建设的指导意见》规定:配合部门服从牵头部门的(),主动配合责任部门开展工作。
A. 安排和协调
B. 安排
C. 规定
D. 要求
[单项选择]()建立在多个企业或产业项目的相互关联互动发展基础之上。
A. 传统工业
B. 生态工业
C. 现代工业
D. 自然工业
[单选题]借款人需要将其动产或权利凭证移交银行占有的贷款方式为( )。
A.质押贷款
B.抵押贷款
C.信用贷款
D.留置贷款

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