题目详情
题目详情:

[单项选择]彩色电视标准规定的三基色是()。
A. 红、绿、蓝
B. 红、黄、绿
C. 红、黄、蓝
D. 青、红、黄

热门试题:

[单选题]在特殊情况下需在带压和带电的设备上进行焊接时,应采取安全措施,并经(  )批准。
A.工作许可人
B.工作票签发人
C.运维负责人
D.本单位
[单选题]分场(区)时,各场(区)的调车工作,由负责该场(区)的(车站调度员)或该场(区)的( )领导。
A.车站调度员
B.调车区长
C.车站值班员
D.监控干部
[单选题]《铁路旅客运输服务质量规范》中规定,办理交接时行举手礼,右手五指并拢平展,向内上方举手至帽沿右侧边沿,小臂形成()角。
A.40°
B.45°
C.50°
D.55°
[单选题]电烙铁(HB508 35W)手机专用 单位 把 零售价( )
A.12.00
B.28.0
[单选题]计划工作是制定计划、执行计划和检查计划三个阶段的工作过程,其基本特征不包括( )。
A.目的性
B.固定性
C.主导性
D.效率性
[判断题]会计核算的“六相符”是指:账账相符、账据相符、账款相符、账实相符、账表相符、内外账务相符。
A.正确
B.错误
[单选题]选平行进路要用( )。[321020201]
A.分线法
B. 断线法
C. 选岔电路
D.选路法
[判断题]浜螺喜食竞争力较强的浒苔,进而有利于保持较高的藻类多样性。
[多选题]变电站的电气主接线必须满足的基本要求有(____)。
A.保证供电可靠性和电能质量
B.接线简单、运行灵活
C.操作简便
D.经济合理
[单项选择]配制灭头虱液,下列哪组是正确的
A. 10g百部、30%乙醇60ml
B. 20g百部、40%乙醇80ml
C. 30g百部、50%乙醇l00ml
D. 40g百部、60%乙醇120ml
E. 50g百部、70%乙醇140ml
[填空题]防火墙及时发现并处理计算机网络运行时可能存在的安全风险、数据传输等问题,其中处理措施包括( ),同时可对计算机网络安全当中的各项操作实施记录与检测,以确保计算机网络运行的安全性,保障用户资料与信息的完整性,为用户提供更好、更安全的计算机网络使用体验。
[判断题]报废的烟草专用机械的出售,不必经国务院烟草专卖行政主管部门批准。 ( )
A.正确
B.错误
[判断题]备用电源无电压时,备用电源自投装置不动作。
A.正确
B.错误
[单选题]勾芡增稠的目的主要是为了增加调料的()能力。
A.扩散
B.吸附
C.渗透
D.挥发
[单选题]手法检查肋骨骨折的可靠措施是
A. 有直接和间接压痛
B. 局部肿胀
C. 局部痛觉过敏
D. 局部皮下气肿
E. 局部瘀斑或皮下出血
[单选题]参与公司系统所承担电气工作的外单位或外来工作人员应熟悉本规程,经考试合格,并经( )认可,方可参加工作。
A.相关单位分管领导
B.设备运维管理单位
C.安全监督管理部门
D.调度控制中心
[判断题]发变组系统发生直接威胁人身安全的紧急情况,应立即将发电机解列停机。( )
A.正确
B.错误
[单选题]死亡1人,或重伤10人以下,或直接经济损失100万元以下的,为( )。
A.一般事故
B.较大事故
C.重大事故
D.特大事故
[单选题]日期和时间的设置必须有防止非授权人操作的安全措施。
A.正确
B.错误
[单选题]依据《中国南方电网有限责任公司电力安全工作规程》(Q/CSG 510001—2015)第16.1.4条规定:金属材料的配电箱、电表箱应可靠接地,且接地电阻应满足要求。工作人员在接触运用中的配电箱、电表箱前,应检查接地装置是否良好,并用验电笔确认箱体确无电压后,方可接触。带电接电时作业人员应戴( )。
A.太阳眼镜
B.高压绝缘手套或帆布手套
C.低压绝缘手套或帆布手套
D.以上都对
[单项选择]对于诊断急性胰腺炎最有价值的是()
A. AMY
B. ALT
C. GGT
D. ACP
E. AIP
[判断题]可靠性是指在保护范围内发生故障时,保护装置不应动作
A.正确
B.错误
[单选题]用户受电端的( )应当符合国家标准或者电力行业标准。
A.供电质量
B.电压标准
C.安全设施
D.保护装置
[单项选择]冷弯性能是指钢材在常温下承受( )的能力。
A. 弹性变形
B. 弯曲变形
C. 延伸变形
D. 塑性变形
[单选题]塔脚检查,在不影响铁塔稳定的情况下,可以在()两个塔脚同时挖坑。配电《安规》
A.对角线
B.同一侧
C.四个角中任选
D.相邻
[单选题]电容器的电容C的国际单位为( )。
A.C
B.V
C.F
D.N
[单项选择]丙型肝炎()
A. 潜伏期为7~21天,平均14天
B. 潜伏期为15~45天,平均30天
C. 潜伏期为10~70天,平均40天
D. 潜伏期为15~150天,平均50天
E. 潜伏期为30~180天,平均70天
[单选题]图像稽查系统的特情编辑里不包含的功能的是( )。
A.变档
B.车牌不符
C.车队
D.入口空卡
[填空题]It is difficult to give a description of (1) because they vary from state to state and city to city.
Some towns allow the sale of very weak, (2) , known as "three-two" beer. Some places (3) of any alcohol on Sundays, not only in bars but also in shops. You may find a locked bar over the alcohol shelves.
In many parts of America, you are not allowed to drink alcohol (4) . That is, you may not sit in a park or (5) drinking beer, and you cannot even take a nice bottle of wine (6) . In some public places, people can be seen taking drinks from cans (7) . These are not cans of Coca-Cola. (8) you are not allowed to drink alcohol while driving, or even (9) container in the car. Some bars (10) only for beer and wine. Others are also allowed to sell spirits and thus, as Americans say, " (11) ".
Many bars have a period (12) , often longer than an hour, when they sell
[单选题]Text 2 In 1946,a 23-year-old Army veteran named John Goodenough headed to the University of Chicago with a dream of studying physics.When he arrived,a professor warned him that he was already too old to succeed in the field.But Dr.Goodenough ignored the professor's advice and today,at 94,has just set the tech industry abuzz with his blazing creativity.He and his team at the University of Texas at Austin filed a patent application on a new kind of battery that,if it works as promised,would be so cheap,lightweight and safe that it would revolutionize electric cars and kill off petroleum-fueled vehicles.We tend to assume that creativity fades with age.But Dr.Goodenough's story suggests that some people actually become more creative as they grow older.A 2016 Information Technology and Innovation Foundation study found that inventors peak in their late 40s and tend to be highly productive in the last half of their careers.Similarly,professors at the Georgia Institute of Technology,who studied data about patent holders,found that,in the United States,the average inventor sends in his or her application to the patent office at age 47,and that the highest-value patents ofien come from the oldest inventors-those over the age of 55.John P.Walsh,one of the professors,joked that the Patent Office should give a"senior discount"since"there's clear evidence that people with seniority are making important contributions to invention."A study ofNobel physics laureates found that,since the 1980s,they bave made their discoveries,on average,at age 50.The peak of creativity for Nobel winners is getting higher every year.For many years,oddsmakers have predicted that Dr.Goodenough would win the Nobel Prize,but so far the call from Stockholm has not come.You might call him the Susan Lucci of chemistry.If he finally does prevail,he could be the oldest person ever to receive the Nobel.The more I talked to Dr.Goodenough,the more I wondered if his brilliance was directly tied to his age.After all,he has been thinking about energy problems longer than just about anyone else on the planet.When I asked him about his late-life success,he said:"Some of us are turtles;we crawl and struggle along,and we haven't maybe figured it out by the time we're 30.But the turtles have to keep on walking."26.We can learn from Paragraph I that John Goodenough has
A.made great contribution to an area of physics.
B.stopped studying physics by a professor's advice.
C.become too old to apply for a patent.
D.lost his creativity while aging.
[多项选择]2011年6月6日,某炼油厂油罐区的2号汽油罐发生火灾爆炸事故,造成1人死亡、3人轻伤,直接经济损失420万元。该油罐为拱顶罐,容量200 m3。油罐进油管从罐顶接入罐内,但未伸到罐底,罐内原有液位计因失灵已拆除。
2011年5月20日,油罐完成了清罐检修。6月6日8时,开始给油罐输油,汽油从罐顶输油时进油管内流速为2.3~2.5m/s,导致汽油在罐内发生了剧烈喷溅,随即着火爆炸。爆炸把整个罐顶抛离油罐。现场人员灭火时发现泡沫发生器不出泡沫,匆忙中用水枪灭火,导致火势扩大。消防队到达后,用泡沫扑灭了火灾。
事故发生后,在事故调查分析时发现,泡沫灭火系统正常,泡沫发生器不出泡沫的原因是现场操作人员操作不当,开错了阀门。该厂针对此次事故暴露出的问题,加强了员工安全培训,在现场增设了自动监控系统,完善了现场设备、设施的标志和标识,制定了安全生产应急救援预案。
根据以上场景,回答下列问题(1~3题为单选题,4~8题为多选题)
油罐内发生火灾时,可以选用的灭火剂包括( )。
A. 直流水
B. 泡沫
C. 开水
D. 二氧化碳
E. 干粉
[多选题]国内外安全吊带按其用途主要分为( )
A.攀登安全吊带
B.高空作业安全吊带
C.高温安全吊带
D.防辐射安全吊带
[单选题]生产经营单位的特种作业人员必须按照国家有关规定经专门的安全作业培训,取得( ) ,方可上岗作业。
A.特种作业操作资格证书
B.相应资格
C.培训合格证书
D.特种作业操作证书
[单选题]在焊机使用中,改变非转移型电弧的电流,可控制焊缝的熔深和稀释率。
A.正确
B.错误
[单选题]CRH5型动车组MVB-A 表示什么意思()
A.列车总线
B.旅客服务线
C.牵引线
D.信号线
[单选题]临时打的孔、洞,施工结束后,应设围栏或坑盖。( )
A.A-正确
B.B-错误
[判断题],大气湿度过高会降低发动机气缸的充气效率及发动机的动力性和燃料经济性。( )(中)
A.正确
B.错误

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