热门试题:
[单选题]用几何法对圆周六等分时,则划规在圆周上选()就可进行。
A.1个点
B.2个点
C.3个点
D.4个点
[判断题]隔离锁将车门机械锁闭,但车门要受集控控制。
A.正确
B.错误
[单项选择]下列对预算定额的描述中,正确的是()。
A. 预算定额肯有企业定额的性质
B. 预算定额是计价定额
C. 预算定额是向班组签发施工任务书的及据
D. 预算定额是直接用于施工管理中的定额
[单项选择]下述肌肉中,屈髋关节的是()
A. 冈上肌
B. 胫后肌
C. 大圆肌
D. 髂腰肌
E. 半腱半膜肌
[单选题]THDS发生故障后,探测站设备修复时间昼间不超过( )。
A.4h
B.6h
C.12h
D.24h
[单选题]输油泵的作用是将柴油从油箱吸入输油泵并以一定压力送至( )。
A.喷油器
B.燃烧室
C.喷油泵
D.气缸
[单选题]对未经补偿的电流互感器来说,在正常运行范围内,其误差的绝对值随着额定一次电流的增大而()。
A.不变
B.减小
C.基本不变
D.增大
[单选题]离心机工作时,含有细颗粒的流体流向滚筒大端,从( )排出。
A.底流口
B.溢流口
C.进浆口
D.出浆口
[多项选择]下列发明人或者设计人作出的发明创造.属于职务发明创造的有()。
A. 某纺织研究所的科研人员张某利用本单位的资金、设备,发明了-项新型充电器
B. 某汽车研究所研究员李某退休后2年,发明了与其在职时从事工作相关的-项新型汽车点火器
C. 某高校化学教师王某为履行学校领导交办的-项临时性的任务,发明了-种新型电光源
D. 某政府官员刘某利用自身物质条件和业余时间,发明了-项新型船用柴油机,但刘某2年前在某船舶动力研究所从事船用柴油机的研发
[单项选择]FIDIC的使命是,在不断提高会员企业( )的同时,接受和坚持工程咨询业的社会责任。
A. 职业道德
B. 技术水平
C. 管理水平
D. 商业利益
[单项选择]货币之所以能够执行价值尺度职能,表现和衡量其他商品的价值,是因为货币本身也有( )
A. 价值
B. 使用价值
C. 流通手段
D. 用途
[单选题][T] A-B-B-001 4 2 1
( )是一种多功能、多量程的便携式电工仪表,一般可以测量直流电流、直流电压、交流电压和电阻等。
A. 电平表
B. 万用表
C.兆欧表
D. 钳形表
[填空题]测井仪器进行刻度时,有()点刻度法和()点刻度法。
[单选题]单选题:拾遗物品由车站当班值班站长/值班员(行车)与拾物人共同清点后,对物品进行编号并在( )上登记。
A.《拾遗物品交接单》
B.《拾遗物品登记簿》
C.《拾遗物品认领登记表》
D.《物品记录清单》
[单项选择]子どもの話をうそと知り()、お金を渡す母であった。
A. まま
B. つつ
C. ても
D. たり
[单项选择]心绞痛与心脏神经官能症的主要鉴别依据是
A. 胸痛的部位
B. 胸痛的性质
C. 胸痛持续的时间
D. 心电图检查
E. 血沉
[简答题]套管损坏可分为哪四种?它们都能用玻璃钢小套管修复吗?
[单选题]在普通线路钢轨接头轨缝的标准尺寸计算公式a0=L(tz-t0)+ag/2中,tz是根据Tmax和Tmin求出的,Tmax和Tmin是指当地( )。
A.历史最高和最低气温
B.年度最高和最低气温
C.历史最高和最低轨温
D.年度最高的最低轨温
[不定项选择题]共用题干
Learn About Noble Gases(惰性气体)
1 Have you ever ridden on a balloon?Many tourist spots offer balloon rides in order for people to see
the beauty of a place from above.A balloon contains a noble gas called helium(氦).Formerly,balloons con-
tamned hydrogen but hydrogen is very flammable and dangerous when uncontrolled.Therefore,people shifted
to helium,which is safer. Helium is safe because it has the properties of the noble gases.
2 People once believed that noble gases couldn't chemically react at all.For this reason,they were
called inert gases(隋性气体).They were also listed under Group 0 in the old periodic table because scien-
tists believed that the gases have zero valence(价)electrons in their outer shell.This was later proven to be
untrue when some noble gas compounds were discovered.
3 The gases are elements,which share similar properties.These properties include being monoatomic,
colorless,odorless,being able to conduct electricity,and having low chemical reactivity.Noble gases
include helium,neon,argon,krypton,xenon and radon.These are all found in Group 18,in the right most
column of the periodic table.If you look at the periodic table,you will notice that these elements are the only
ones which do not have a charge. Helium has the lowest molecular(分子的)weight while radon is the
heaviest.
4 Remember that chemical reactions occur because atoms have valence electrons,which are electrons
in their outer shell.When the outer shell is"unfilled"or the required number of electrons is not yet com-
plete,the atom is more reactive.Noble gases have a full outer shell,meaning that they have complete elec-
trons in their outer shell.This complete number varies.For instance,the outer shell of helium has 2 valence
electrons while the outer shell of xenon has 8 electrons.Nowadays,there remains to be a few noble gases
because of the low chemical reactivity of these said gases.
5 because of their properties,noble gases have many important applications.They are widely used in
medicine and industries. For instance , liquid helium is used for superconducting magnets(磁体).These
magnets are very important in physics and medicine.When a doctor suspects that a person's brain has been
damaged,he might request for Magnetic Resonance Imaging(MRI).MRI allows the doctor to"see"the
brain,without operating on the patient.
Noble gases are not very chemically__________.
A.reactive
B.lightest
C.important
D.complete
E.flammable
F.unnecessary
[多项选择]下列关于合伙企业出资的表述中,正确的是:
A. 甲利用乙交其保管的卡车出资
B. 甲以自己所有的房屋出资
C. 经全体合伙人同意,甲以自己的劳务出资
D. 甲用乙托其保管的私房钱出资
[单选题]6号线强转道岔操作必须得到()的授权
A.行调
B.司机
C.运转
D.信号专业
[单项选择]In order to work here the foreigner needs a work permit, which must be applied (31) by his prospective employer. The problem here is that the Department of the Employment has the right to (32) or refuse these permits, and there is little that can be (33) about it.
It would be extremely unwise (34) a foreign visitor to work without a permit, since anyone doing so is (35) to immediate deportation. There are some (36) to this rule, moot notably people from the Common Market countries, who are (37) to work without permits, and who are often given (38) residence permits of up to five years. Some (39) people, such as doctors, foreign journalists, (40) and others, can work without permits.
The problem with the Act is not just that some of its rules are unfair but (41) it is administered, and the people who administer it.
An immigrations official has the power to stop a visito
A. for
B. to
C. as
D. An
[单选题]平西车间管内ONU拓扑组网呈( )。
A.综合型
B.环型
C.星型
D.树形
[判断题]用水浇灭距离接触网4m以外的燃着物时,接触网可以不停电。但是,水管不准朝接触网方向喷射,水流与接触网带电部分应保持2m安全距离。( )
A.正确
B.错误
[单项选择]你有一台运行Win 7的计算机,你执行一个镜像备份。一个病毒感染了计算机并导致计算机变得没有响应。你需要尽可能快的还原计算机。你应该怎么做?()
A. 使用最后一次正确配置功能启动计算机
B. 使用Windows 7 DVD启动计算机并使用启动恢复工具
C. 使用Windows 7 DVD启动计算机并使用系统镜像恢复工具
D. 从Windows PE启动计算机,并运行Imagex.exe
[单选题]对于没有顺桨机构的飞机,一旦发生停车,应该()。
A.把变距杆推向最前
B.把变距杆拉向最后
C.立即关闭油门
D.增大飞机的迎角
[单选题]新文化运动提倡白话文,能够使语言和文字更紧密地统一起来,为广大民众所接受,有利于文化的普及与繁荣。新文化运动中笫一部白话新诗别集是()。
A.《新青年》
B.《扬鞭集》
C.《尝试集》
D.《旧梦》
[单项选择]铰圆锥孔时,圆锥孔的表面粗糙度是由铰刀的( )来保证的。
A. 锥度
B. 切削刃
C. 圆锥角
[不定项选择题]A.生姜、白矾
A.黑豆
B.甘草、石灰
C.甘草
D.甘草、黑豆
E.制备淡附片的辅料是
[判断题]在进行建筑物倒塌处置时,确认有官兵被埋压后,要查明被埋压人员的大致部位,如埋压不深或建筑构件较易搬运时,应迅速组织力量进行救助,争取在第一时间抢救出被埋压的官兵。()
A.正确
B.错误
[单选题]非特殊情况不得变更工作负责人,如确需变更工作负责人应由工作票签发人同意并通知()。
A.值班调控人员
B.工作班成员
C.工作许可人
D.运维负责人
[单项选择]男性,40岁。反复口腔、外阴溃疡3年,伴多关节肿痛,检验血常规正常,血沉正常,ANA(-),RF(-),ANCA(+),应考虑诊断为 ()
A. 白塞病
B. 骨关节炎
C. 骨质疏松症
D. 类风湿关节炎
E. 系统性红斑狼疮
[多选题]高铁无砟轨道CPⅢ点应沿线路埋设在( )上。
A.路肩封闭层
B.路基两侧接触网杆或其基础
C.桥梁防护墙
D.隧道边墙
[多选题]三、四、五星班组一般营销差错事故标准。
A.≤3宗/年
B.≤2宗/年
C.≤1宗/年
D.≤0宗/年