热门试题:
[单项选择]
The world’s population continues to grow. There now are about 4 billion of us on earth. That could reach 6 billion by the end of the century and 11 billion in another 75 years. Experts long have been concerned about such growth Where will we find the food, water, jobs, houses, schools and health care for all these people
A major new study shows that the situation may be changing. A large and rapid drop in the world’s birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations,
Researchers said they found a number of reasons for this. More men and women are waiting longer to get married and are using birth control devices and methods to prevent or delay pregnancy. More women are going to school or working at jobs away from their homes instead of having children. And more governments, especially in developing nations, now support family p
A. worried about
B. related to
C. engaged in
D. made a study of
[单项选择]在我国，影响商业银行存款量增减的外部因素是( )。
A. 存款利率
B. 服务质量
C. 存款种类
D. 业务关系
[单项选择]关于阴道穹，与临床诊断治疗关系密切的是（）
A. 左侧阴道穹
B. 右侧阴道穹
C. 两侧阴道穹
D. 阴道前穹
E. 阴道后穹
[单项选择]旅游者在用餐时，地陪一般要等上了（）道菜后方可离开。
A. 4
B. 3
C. 2
D. 1
[单项选择]下列关于β系数，说法不正确的是 ( )
A. β系数可用来衡量可分散风险的大小
B. 某种股票的β系数越大，风险收益率越高，预期报酬率也越大
C. β系数反映个别股票的市场风险，β系数为0，说明该股票的市场风险为零
D. 某种股票β系数为1，说明该种股票的风险与整个市场风险一致
[填空题]打印机是一种常用的输出设备，除了有些高速激光印字机使用SCSI接口与PC机相连以外，打印机一般都使用并行接口与PC机相连，但近年来使用 【19】 接口的情况越来越多。
[单选题]年度财务会计报告，应于年度终了后（）内对外报送。
A.6日
B.15日
C.60日
D.4个月
[判断题] 水被加热至饱和状态时,汽化和液化将处于静止状态( )。
A.正确
B.错误
[单选题]在党的思想建设中,既清算“左”又清算右的错误的会议或运动是( )。
A.遵义会议
B.1942年整风运动
C.1962年七千人大会
D.中共十一届三中全会
[单选题]（ ）指司机控制设备与列尾主机均解除唯一对应关系。
A.断连
B.消号
C.断电
D.故障
[判断题]58. 赔偿委员会作出的赔偿决定，不是发生法律效力的决定，可以中止执行。
A.正确
B.错误
[判断题]PLC 通用编程软件可能会自带模拟仿真的功能（ ）
A.正确
B.错误
[单项选择]口对口人工呼吸时吸入的氧气浓度为（）。
A. 10%
B. 16%
C. 21%
D. 25%
E. 30%
[单选题]B-757飞机的应急灯按钮在（ ）。
A.前乘务员的控制面板上
B.后乘务员的控制面板上
C.中乘务员的控制面板上
D.驾驶舱
[单选题]驱铅常用的药物是（）
A.葡萄糖醛酸
B.依地酸二钠钙
C.硫代硫酸钠
D.二甲基硅油
E.阿托品
[单项选择]资产管理中资产内部移交不符合规定的是（）。
A. 工商所机构调整合并时，由县工商局会同有关单位进行财产清查，办理交接手续
B. 资产管理员岗位变动时，应自行办理交接手续
C. 资产使用人员调离或退休，须交清所用资产
D. 资产使用人员变动由本级资产管理员负责
[判断题]消防员灭火防护服适用于消防员在灭火救援时穿着,也适用于在高温环境中使用。( )
A.正确
B.错误
[单项选择]肿而皮肉重垂胀急，深则按之如烂棉不起，浅则光亮如水疱，破流黄水者，多
A. 火
B. 寒
C. 风
D. 湿
E. 痰
[不定项选择题]共用题干
第一篇
Pool Watch
Swimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble.The
Royal Society for the Prevention of Accidents says that on average 15 people drown in British poois each
year,but many more suffer major injury after getting into difficulties.Now a French company has developed
an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger of
drowning.
When a swimmer sinks towards the bottom of the pool,the new system sends an alarm signal to a pooi-
side monitoring station and a lifeguard's pager. In trials at a pool in Ancenis,near Nantes,it saved a life
within just a few months,says Alistair McQuade,a spokesman for its maker,Poseidon Technologies.
Poseidon keeps watch through a network of underwater and overhead video cameras.Al software
analyses the images to work out swimmers'trajectories.To do this reliably,it has to tell the difference be-
tween a swimmer and the shadow of someone being cast onto the bottom or side of the pool."The underwater
environment is a very dynamic one,with many shadows and reflections dancing around,"says McQuade.
The software does this by"projecting"a shape in its field of view onto an image of the far wall of the
pool.It does the same with an image from another camera viewing the shape from a different angle.If the
two projections are in the same position,the shape is identified as a shadow and is ignored.But if they are
different,the shape is a swimmer and so the system follows its trajectory.
To pick out potential drowning victims,anyone in the water who starts to descend slowly is added to the
software's "pre-alert" list,says McQuade.Swimmers who then stay immobile on the pool bottom for 5
seconds or more are considered in danger of drowning. Poseidon double-checks that the image really is of a
swimmer,not a shadow, by seeing whether it obscures the pool's floor texture when viewed from overhead.
If so,it alerts the lifeguard,showing the swimmer's location on a poolside screen.
The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe,
Buckinghamshire.One man who is impressed with the idea is Travor Baylis,inventor of the clockwork
radio.Baylis runs a company that installs swimming pools一and he was once an underwater escapologist with
a circus." I say full marks to them if this works and can save lives,"he says.But he adds that any local
authority spending ￡30,000-plus on a Poseidon system ought to be investing similar amounts in teaching
children to swim.
What is required of AI software to save a life?
A.It must be able to swim.
B.It must keep walking round the pool.
C.It can distinguish between a swimmer and a shadow.
D.It can save a life within a few months.
[多选题]我国经济已由高速增长阶段转向高质量发展阶段,正处在()的攻关期。
A.转变发展方式
B.优化经济结构
C.转换增长动力
D.转变政府职能
[单选题]采用固定式低倍数泡沫灭火系统的储罐区,应沿防火堤外侧均匀布置泡沫消 火栓,泡沫消火栓的间距不应大于( )m,且设置数量不宜小于4 个。
A.10
B.100
C.50
D.60
[单选题]简易洗消喷淋器为快速洗消装置，依靠外接压力水进行喷淋， 具有多喷嘴、（ ）、重量轻等特性。
A.易组装
B.水压大
C.易携带
D.设施齐全
[单选题]大接地电流系统中,不论正向发生单相接地,还是发生两相接地短路时,都是31。 超前3U。约( )。
A. 30°
B. 45°
C. 70°
D. 110°
[单项选择]
通过简单地将金属粉末混合物点燃的方法，可以在一瞬间制成类似于制造计算机磁盘驱动器时所使用的组合磁铁，其造价只相当于普通制造方式的一小部分。
用传统方法制造类似于陶瓷的磁性材料铁素体，要经过几个步骤，而使用伦敦大学学院的伊万帕金和昆廷潘克赫斯特发明的“一步法”，可以用金属铁和金属氧化物的混合物直接制造铁素体磁铁，所谓的铝热剂混合物被放置在磁场中并且点燃，从而引发一种自己持续下去的化学反应，释放出高热，迫使混合物的成分发生反应并形成铁素体。铁素体再由外部磁场磁化。
研究人员发现，通过小心地控制加在混合材料上的磁场，能够使制造出的同一块磁铁的不同区域具有不同的磁场强度和极性。这种复杂的磁铁有着广泛的用途，包括用来制造计算机磁盘驱动器以及粒子加速器内的电动机。通常的制造方法是将几块磁铁黏合在一起。
通过这种铝热剂技术来制造这些组合磁铁不仅更快更便宜，而且效果也更好。潘克赫斯特说：“这些磁铁比将单个磁铁黏合在一起时所产生的磁力强得多。这种技术可能带来的好处是无限的。”
下列不属于伊-昆氏“一步法”的一项是（）。
A. 将金属铁和铝热剂的粉末加以混合
B. 将混合的粉末置于磁场中并且点燃
C. 加温使其发生化学反应而放出高热
D. 形成铁素体之后再由外部磁场磁化
[单选题]飞行驾驶员操纵无人机无坡度转弯，正确的操纵方式是
A.向转弯方向压方向舵，副翼同方向打以保证坡度水平
B.向转弯方向压方向舵，副翼反打以保证坡度水平
C.向转弯方向压方向舵，副翼同方向打以形成坡度
[单选题]( )是指在规定的试验条件下,受检砂浆和基准砂浆的流动度相同时,受检砂浆的减水率。
A.水泥净浆流动度
B.水泥砂浆工作性
C.减水率
D.坍落度增加值
[单选题]对平板电极，极间距离d＝2cm，施加电压（幅值）UP＝50kV。试求：极间为单一空气介质（ε1≈ε0，ε0为真空介电常数）时的场强EP1为（）。
A.100kV／cm
B.50kV／cm
C.25kV／cm
D.12.5kV／cm
[单选题]逆流加料多效蒸发过程适用于()。
A.黏度较小溶液的蒸发
B.有结晶析出的蒸发
C.黏度随温度和浓度变化较大的溶液的蒸发
D.都可以
[单选题]以下有关涂料调配的说法，不正确的是（）。
A.调配前1～2天将涂料整桶倒置
B.要充分搅拌
C.调配好的涂料最好在桥上施工时再加稀释剂
D.涂料要尽量现调现用
[单选题]港口岸电工作过程中，与110kV高压线路、设备不停电时的安全距离为（）。
A.0.7m
B.1.0m
C.1.5m
D.3.0m
[填空题]This autumn term, spring term, or academic year program offers advanced students an opportunity to improve their spoken and written Chinese, and to be familiar with a range of people and organizations that are helping to shape China’s relationship with the United States and the world. All students who take intermediate or advanced Chinese language may make a choice to participate in the Professional Development Program that includes guest lectures by Chinese and foreign professionals on areas such as politics, foreign affairs, economics, trade, media, art, and culture. This program is supplemented(补充)by field trips and short journeys in and around Beijing.
Housing and meals: Students live in the foreign student dormitories and take meals in the dormitory dining hall.
Requirements: Two years of college-level Chinese and one Chinese studies course; graduate students accepted.
Program Fee: 1998 Autumn Term: $ 6,995; 1999 Spring Term: $ 6,995. Fees inclu
[填空题]In dealing with one’ s future career, one cannot but admit that it is very important to decide one’ s future career __________________(尽早).
[单项选择]根据“全面进口监督计划”出口商品必须提供由政府部门指定机构签发的( )。
A. 原产地证书
B. 品质检验证书
C. 清洁报告书
D. 安全检验证书
[单选题] 思科路由器重启的命令是(? )。?
A.telnet
B.shut down
C.trace
D.reload
[单选题]68．瘫痪病人的错误护理措施是
A.预防褥疮和肺炎
B.预防泌尿道感染
C.瘫痪肢体保持功能位
D.避免瘫痪肢体活动
E.鼓励多饮水
[单选题]经常有人工作的（）及施工车辆上宜配备急救箱，存放急救用品，并应指定专人经常检查、补充或更换。
A. A.场所
B.B.施工场地
C.C.各班组
D.D.作业现场
[单项选择]糖皮质激素在炎症急性阶段的作用是
A. 具有强大的抗炎作用，促进炎症消散
B. 抑制肉芽组织生长，防止粘连和瘢痕
C. 促进炎症区的血管收缩，降低其通透性
D. 稳定溶酶体膜，减少蛋白水解酶的释放
E. 抑制花生四烯酸释放．使炎症介质PG合成减少
[判断题]《民用机场管理条例》规定，军民合用机场民用部分的管理除遵守民用机场管理条例的有关规定外，还应当遵守国务院、中央军事委员会的有关规定。
A.正确
B.错误
[单选题]人寿保险标准条款中，充分体现人寿保险的根本宗旨的是（ ）。
A.不丧失价值条款
B.不可抗辩条款
C.宽限期条款
D.复效条款
