热门试题:
[单项选择]
Passage 2
It seems to shine unchangingly, pouring out a constant light year after year. But the sun may not be nearly so stable as we suppose. It is now thought to move quickly and irregularly and change in long-term cycles, growing dimmer and then brighter with each passing year. Some even fear that its frequent changing behavior would have a great influence on the Earth’ s climate.
The source of the sun’ s inconstancy is magnetism. Professor William Livingston has developed new theories about its magnetic nature.
"We don’ t yet know what causes sun spots, "he says, "but we now think they ’ re areas of high level magnetism that come up from the sun’ s interior. So strong is their magnetic pull that the highly ionized gas nearby is not able to transmit energy out. "As a result these areas send out less heat and light and thus appear from Earth to be almost dark irregular surface patches.
Sun
A. He thinks he has discovered a new possibility in the link between sun spots and the weather on the Earth.
B. He has great doubts about the theory that the sun' s frequent changes have an influenced on the Earth' s climate.
C. He has been recently informed by other scientists of the possibility that more sun spots will appear.
D. He does not think the causes of the sun spots will be fully revealed by scientists in the near futur
[判断题]调车信号机在调车车列全部越过调车信号机后自动关闭。
A.正确
B.错误
[多选题]监护仪显示装置有( )
A.指针式指示器
B.数字显示器
C.示波器
D.信号灯
[多选题]汽车走合的好坏,会对( )产生重要影响。
A.A.汽车寿命
B.B.驾驶技术
C.C.安全性
D.D.经济性
[单选题](2018年考题)郊区0.4KV室外架空导线应用的导线为()。
A.钢芯铝铰线
B.铜芯铝铰线C多芯铝铰绝缘线
D.铜线
A.A
B.B
C.C
D.D
[单选题]标准法测定砂的表观密度,将烘干的试样装入容量瓶中,摇转容量瓶排除气泡,静置( )h,用滴定管加水称其质量。
A.12
B.16
C.24
D.30
[单项选择]The uncultivated part of the arable land in Saudi Arabia is
A. 9,000 sq. km.
B. 15,000 sq. km.
C. 6,000 sq. km.
D. 242,000 sq. km.
[判断题](28695)( )遵章守纪作为职业道德,不一定是一种发自内心的自我要求和自我约束。
A.正确
B.错误
[判断题]在年度检查计划外,针对火灾多发频发的行业和领域,适时开展集中专项整治。
A.正确
B.错误
[单选题]下列不属于护理交叉学科的是
A.护理心理学
B.护理美学
C.护理管理学
D.护理教育学
E.护理学基础
[单选题]患者女性,70岁,高血压病史15年。晨起发现右侧肢体瘫痪,当时意识清楚,被家人送到医院进行治疗。CT结果为低密度影,选择溶栓的时间是
A.发病后2小时内
B.发病后3小时内
C.发病后4小时内
D.发病后5小时内
E.发病后6小时内
[单选题]表压超过( )M Pa 的液体和气体的设备和管路, 应安装压力表,必要时还应安装安全阀和逆止阀等安全装置。
A.0.5
B.0.2
C. 0.1
[单选题]扑救地下车库火灾时,由外部进入内部进攻,一般选择从()出入通道向内部进攻。(易)
A.上风
B.下风
C.中部
D.距火源最近
[判断题]风力超过5级时,禁止砍剪高出或接近带电线路的树木。
A.正确
B.错误
[单选题]实施股票分割和股票股利产生的效果相似,他们都会( )。
A.降低股票每股面值
B.减少股东权益总额
C.降低股票每股价格
D.改变股东权益结构
[单项选择]What is False according to the passage
A. There are many planets which are like the earth.
B. We have been sending radio messages to the outer space since the beginning of the last century.
C. The distance between us and other inhabitants of the universe is perhaps too large to be conquered.
D. There are probably other intelligent life like us existing somewhere in the universe.
[单项选择]
干支纪年法是中华民族的伟大发明。在1851年“辛亥”年和下一个“辛亥”年中,各发生了一次重大的革命运动,对这两次革命运动说法正确的是()
①都未改变中国的社会性质②都把斗争矛头直指清朝统治者
③都要求在中国实行民主政治④都推动了中国近代化的进程
A. ①②③
B. ①③④
C. ②③④
D. ①②④
[单选题]拆除模板()进行,集中堆放拆下的模板,及时拔掉或打弯木模板外露的铁钉。
A.自下而上
B.随处
C.自内而外
D.自上而下
[多选题]航空货运销售代理人应当核查( )等有效航空运输文件。
A.托运人的有效身份证件
B.航空货物托运书
C.航空器安保检查单
D.航空货运单
[单选题]地铁付费区指乘客在支付车费后方能够进入的区域,车站通过安装( )来区分付费区与非付费区。
A.出入口
B.闸机
C.安检机
D.电扶梯
[判断题]放顶煤采煤法的顺槽一般沿着煤层底板掘进。()
A.正确
B.错误
[多选题]在生产经营过程中,发生下列情况或造成下列后果之一的为较大事故:()
A.一条或多条线路全线停运12小时以上24小时以下
B.压力容器、压力管道爆炸
C.起重机械整体倾覆
D.重伤10人以上30人以下
[多选题]送电线路对电信线路的磁危险影响计算应符合()规定。
A.在中性点直接接地系统中,应按送电线路发生单相接地短路故障计算;
B.在中性点不直接接地系统中,对长途电信电缆线路应按送电线路两相不同地点同时发生接地故障计算;
C.在中性点不直接接地系统中,除长途电信电缆外,对其他电信线路不考虑此項影响;
D.在中性点不直接接地系统中,对各类电信线路,均不作危险影响计算。
[判断题]燃油、燃气锅炉应减少不必要的启炉、停炉、吹扫程序,以达到节约热能的目的。
A.正确
B.错误
[单选题]逆变器类型分布式电源接入220/380V配电网,其接入容量超过本台区配电变压器额定容量( )时,配变低压侧刀熔总开关应改造为低压总开关,并在配电变压器低压母线处装设反孤岛装置。
A.0.2
B.0.25
C.0.3
D.0.5
[多选题]()是指境内付款银行向境内收款银行主动发起的付款业务,包括普通贷记业务、转汇业务和退汇业务。
A.境内跨行贷记业务
B.境内跨行借记业务
C.轧差净额业务
D.付款交割业务
[单项选择]某施工项目的已完工作预算费用、计划工作预算费用、已完工作实际费用如下图所示,则在检查时间点的检查结论是()。
A. 成本超支,进度加快
B. 成本超支,进度拖延
C. 成本节约,进度加快
D. 成本节约,进度拖延
[填空题]换流阀厅设备安装,阀冷却系统的设备和管道应(),
[单选题]询问波束方向性图分水平方向性和垂直方向性图。垂直方向性图的主要作用是()。
A.不同高度层目标的覆盖层
B.决定目标的作用距离
C.区分相同距离两目标的最小的方位角度
D.区分相同方向两目标的最小的距离
[多项选择]施工单位的计划体系包括( )。
A. 工程项目前期工作计划
B. 项目管理规划大纲
C. 项目管理实施规划
D. 工程项目建设总进度计划
E. 工程项目年度计划
[判断题]21世纪以来兴起的、脸谱、推特、微博、微信等网络技术新应用使得以往美英文化独大的网络空间开始变得更加多样化。
[单选题]下列不是抗血小板聚集药的是
A.氯吡格雷
B.盐酸噻氯匹定
C.阿司匹林
D.华法林
E.双嘧达莫
[单选题]锅炉用低碳钢管具有塑性好、韧性高、( )好的优点。
A.可焊性
B.导热性
C.导电性
D.可铸性
[单项选择]
Americans believe time is a limited resource; they try to conserve and manage it. People in the U.S. often (31) seminars or read books on time management. It seems they all want to (32) their time better. Professionals carry around pocket planners-some in electronic form--to keep (33) of appointments and deadlines. People do all they can to (34) more life out of their time. The early American hero Benjamin Franklin expressed this (35) best: "Do you love life Then do not waste time, for that is the (36) life is made of."
To Americans, punctuality is a (37) of showing respect for other people’s time. (38) more than 10 minutes late to an appointment usually (39) an apology, and maybe an explanation. People who are running late often call (40) to let others know of the delay. Of course, the less (41) the situation, the less important it is to be exactly on time. At informal get-togeth
A. finances
B. schedules
C. conventions
D. rituals
[判断题]多台电焊机可以同时使用一个电源开关。 ( )
A.正确
B.错误
[单项选择]根据《宪法》规定,下列不属于中国公民的义务的是()
A. 保卫祖国,抵抗侵略
B. 依法纳税
C. 依照法律参加民兵组织
D. 遵守纪律