[单选题]当ωt=240°时,i1=Sin(ωt+120°)、i2=S-我要搜题网

[单项选择]History tells us that the origin of Santa Claus begins in the 4th century with Saint Nicholas, Bishop of Myra (an area in present day Turkey). One of the legends tells about that he (62) a fortune when his parents died while he was still in his teens. By (63) St. Nicholas was an honest and (64) man. He cared deeply for the poor, and particularly (65) to children. He brought various gifts, money and other useful items to the houses of the poor. He did this at night, and in (66) , so that no one knew, (67) he wanted no glory, he just wanted to help people. He became widely known for his generosity.
There is one famous (68) about Saint Nicholas. The story tells (69) Nicholas hearing one day of three beautiful sisters who lived in a miserable (70) on the edge of Myra. The three sisters were very poor. They could (71) earn enough to keep themselves and their old mother from s
A. shatter
B. splash
C. spread
D. scout

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[多选题] 《中国南方电网有限责任公司电力安全工作规程》(Q/CSG510001-2015)5.4.6规定:施工电源保护地线(PE)在施工应注意哪些情况( )。
A.严禁断线
B.严禁在保护地线装设开关
C.严禁在保护地线装设熔断器
D.严禁在保护地线通过工作电流

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[单项选择]阅读下面一段文字，完成下列问题
鲁迅笔下的阿Q，对于自己进监牢并不烦恼，而以为“惟有圈而不圆，却是他‘行状’上的一个污点”。不仅如此，鲁迅用一百多字详尽描写“阿Q立志要画得圆”却未能如愿的过程，其用心又是什么。
鲁迅在《阿Q正传》中并没有解答的问题却在杂文中显示了解答的钥匙。鲁迅认为，圆滑是中国国民性的特征之一，大团圆是中国小说戏曲的重要特征，甚至自然景观的欣赏也有“十景病”的圆满心理。鲁迅认为，中国的历史只有两个时代：“想做奴隶而不得的时代”和“暂时做稳了奴隶的时代”，“这一种循环，也就是‘先儒’之所谓‘一治一乱’也就是原地不动地画圆圈”。
阿Q所画的圆圈，不是一个普通的圆圈，而是中国文化的象征符号。
阿Q的精神胜利法，就是国民希求圆满的象征。阿Q的地位一降再降，面对种种不幸，心理上仍能够圆满，精神上仍能够胜利，就典型而近乎夸张地突现了国民希求圆满的心态。
阿Q的“革命”是传统的画圆圈式的“革命”的翻版。阿Q式的革命即使成功了，也不过是另换了一个皇帝甚至暴君，“在自己的瓦砾中修补老例”。因此，不能简单地在阿Q革命与辛亥革命之间画上等号。
具有团圆心理的国民，只能演出一场圆圈式的革命，结尾也应该是大团圆才对，所以鲁迅为小说的最后一章命题为“大团圆”。当然，它没有重复传统小说和戏曲的大团圆，而是以具有象征意味的反语技巧，来打破大团圆。阿Q所希望画圆的圆圈，将阿Q送上了杀头示众的路。鲁迅对封建传统文化的控诉是最令人惊心动魄的，在小说中只有《狂人日记》中的古旧传统“吃人”，可以与之相比。
第二段“却在杂文中显示了解答的钥匙”这句中的“钥匙”所指的一项是：
A. 阿Q式的革命
B. 阿Q的精神胜利法
C. 鲁迅的杂文
D. 中国文化的象征符号

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[单选题]桥隧建筑物的经常保养，要及时消灭超限和（）处所，保持桥隧设备状态经常均衡完好，确保行车安全平稳。
A.已经超限
B.临近超限
C.严重超限
D.部分超限

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[单项选择]幼儿在参与某种活动后所得到的各不相同的结果的是（）
A. 展开性目标
B. 行为目标
C. 表现性目标
D. 过程目标

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[单选题]装置停工时，循环气中CO的浓度＞30ppm时，反应器床层温度不得低于(　　)℃。
A.A、 205
B.B、 215
C.C、 225
D.D、 235

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[单选题]The US$3-million Fundamental physics prize is indeed an interesting experiment,as Alexander Polyakov said when he accepted this year’s award in March.And it is far from the only one of its type.As a News Feature article in Nature discusses,a string of lucrative awards for researchers have joined the Nobel Prizes in recent years.Many,like the Fundamental Physics Prize,are funded from the telephone-number-sized bank accounts of Internet entrepreneurs.These benefactors have succeeded in their chosen fields,they say,and they want to use their wealth to draw attention to those who have succeeded in science. What’s not to like?Quite a lot,according to a handful of scientists quoted in the News Feature.You cannot buy class,as the old saying goes,and these upstart entrepreneurs cannot buy their prizes the prestige of the Nobels,The new awards are an exercise in self-promotion for those behind them,say scientists.They could distort the achievement-based system of peer-review-led research.They could cement the status quo of peer-reviewed research.They do not fund peer-reviewed research.They perpetuate the myth of the lone genius. The goals of the prize-givers seem as scattered as the criticism.Some want to shock,others to draw people into science,or to better reward those who have made their careers in research. As Nature has pointed out before,there are some legitimate concerns about how science prizes—both new and old—are distributed.The Breakthrough Prize in Life Sciences,launched this year,takes an unrepresentative view of what the life sciences include.But the Nobel Foundation’s limit of three recipients per prize,each of whom must still be living,has long been outgrown by the collaborative nature of modern research—as will be demonstrated by the inevitable row over who is ignored when it comes to acknowledging the discovery of the Higgs boson.The Nobels were,of course,themselves set up by a very rich individual who had decided what he wanted to do with his own money.Time,rather than intention,has given them legitimacy. As much as some scientists may complain about the new awards,two things seem clear.First,most researchers would accept such a prize if they were offered one.Second,it is surely a good thing that the money and attention come to science rather than go elsewhere,It is fair to criticize and question the mechanism—that is the culture of research,after all—but it is the prize-givers’money to do with as they please.It is wise to take such gifts with gratitude and grace. According to Paragraph 4,which of the following is true of the Nobels?
A.Their endurance has done justice to them.
B.Their legitimacy has long been in dispute.
C.They are the most representative honor.
D.History has never cast doubt on them.

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[多选题]起重设备的操作人员和指挥人员应( )后方可独立上岗作业。
A.经专业技术培训;
B.经实际操作及有关安全规程考试合格、取得合格证;
C.熟悉起重设备;
D.熟悉作业指导书

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[判断题]单一电价制度可以对用户用电起到鼓励或制约的作用。（）
A.正确
B.错误

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[单项选择]根据《物权法》的规定，下列不属于侵犯相邻权的行为是______。
A. 某住宅小区每两周某个下午进行一次锄草活动，锄草机的轰鸣声导致居民烦躁不安
B. 某夜总会的霓虹灯夜夜闪烁不停，致使对面小区的居民无法入睡
C. 居民甲向其邻居乙家的房屋后面倾倒垃圾
D. 某建筑施工企业在施工现场挖坑，导致临近的民房地下渗水

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[简答题]大堂服务团队在营业前应做好“检验网点内供客户使用的各类系统设备运行状态”等相关工作，可简称为（

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[多项选择]《物业管理条例》确定的基本制度包括( )。
A. 业主大会制度
B. 业主公约制度
C. 住宅小区治安管理制度
D. 住宅小区综合验收制度
E. 住房专项维修资金制度

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[判断题]制成的成品泵，其最小汽蚀余量并不确定。（）
A.正确
B.错误

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[单项选择]“好的开端是成功的一半”，下列关于怎样学好地理说法错误的是（）
A. 学会看地图
B. 学会搜集地理信息、思考地理问题
C. 在野外旅行中学习地理
D. 努力背书

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[单选题]进行电焊、气焊等具有火灾危险作业的人员和( )的操作人员,必须持证上岗,并遵守消防安全操作规程
A.自动消防系统
B.消火栓系统
C.防排烟系统
D.消防供水管网系统

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[单选题]高校科学研究职能的确立起始于( )。
A. 哈佛大学
B. 哥廷根大学
C. 柏林大学
D. 威斯康星大学

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[单选题]电流对人体的作用事先没有任何预兆，伤害往往发生在瞬息之间，人体一旦遭到电击，防卫能力迅速降低。下列有关电流对人体的作用，说法正确的是（）。
A.对于电击来说60Hz是最危险的频率
B.冲击电流包括感知阈值、疼痛界限、室颤阈值和摆脱阈值
C.电流持续时间超过心脏跳动周期时，室颤电流约为50mA
D.左手到背部是电流流经人体最危险的途径

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[简答题]什么是安全设施“三同时”?

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[单选题]当ωt=240°时,i1=Sin(ωt+120°)、i2=Sin(ωt+30°)、i3=Sin(ωt+200°)分别为( )。
A.0、负值、正值
B.0、正值、负值
C.负值、0、正值
D.负值、正值、0

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[单选题]当ωt=240°时,i1=Sin(ωt+120°)、i2=Sin(ωt+30°)、i3=Sin(ωt+200°)分别为( )。A.0、负值、正值B.0、正值、负值C.负值、0、正值D.负值、正值、0

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[单选题]当ωt=240°时,i1=Sin(ωt+120°)、i2=Sin(ωt+30°)、i3=Sin(ωt+200°)分别为( )。
A.0、负值、正值
B.0、正值、负值
C.负值、0、正值
D.负值、正值、0