热门试题:
[单项选择]发动机工作时,带动机油泵,使机油产生一定压力,连续不断地送到各磨擦表面上去,此种润滑方式称为()。
A. 飞溅润滑
B. 压力润滑
C. 复合润滑
D. 综合润滑
[判断题]个人防护用品是指为使职工在职业活动过程中,减轻事故和职业危害因素的伤害而提供的个人穿戴用品。
A.正确
B.错误
[单选题]劳动合同依法被确认无效,给对方造成损害的,( )应当承担赔偿责任。
A.用人单位
B.有过错的一方
C.劳动者
D.工会
[判断题]
通信导航监视设施的直击雷防护设计应符合
GB50057—94(2000年版)
三章第
三节规定的第
二类第
防雷建筑物要求。
A.正确
B.错误
[多选题]QUESTION 183
某公司由一个总公司和两个分公司组成,并使用 MPLS VPN 技术传递私网路由。在Hub&Spoke 的组网模式中,分公司只能与总公司通信,分公司之间不能互相通信。
A.总公司:import Target:1:1,2:2;Export Target: 3:3. 分公司 1: Import Target:3:3; Export Target: 1:1
分公司 2:import Target: 3:3; Export Target: 2:2
B.总公司:import Target:12:3;Export Target: 3:12. 分公司 1: Import Target:3:12; Export Target: 12:3 分公司 2:import Target: 3:12; Export Target: 12:3
C.总公司:import Target:1:1;Export Target: 3:3. 分公司 1: Import Target:3:3; Export Target: 1:1 分公 司 2:import Target: 3:3; Export Target: 2:2
D.总公司:import Target:2:2;Export Target: 3:3. 分公司 1: Import Target:3:3; Export Target: 1:1 分公 司 2:import Target: 3:3; Export Target: 2:2
[多选题]下列关于15米金属拉梯维护保养的表述中,正确的是( )。
A.消防梯日常应始终保持战斗准备状态。
B.消防梯应根据厂家的使用说明定期进行维护保养。
C.消防梯应保持清洁干燥,运动部位需涂抹机油,以防生锈,滑轮或活动铁角、滑槽处加油润滑,保证滑动良好,以防零件磨损。
D.消防梯可以露天存放、侧斜立放。
E.梯子的撑脚是梯子升降的主要部件,应经常加润滑油,并清除上面因磨损而产生的毛刺,以保证梯子下降灵活。
[多项选择]双倍余额递减法和年数总和法这两种计算固定资产折旧的方法,其共同点有 ______。
A. 每期折旧率固定
B. 加速折旧方法
C. 考虑净残值
D. 前期折旧额高,后期折旧额低
E. 每期折旧额相等
[单选题]软件从一个计算机系统或环境转移到另一个计算机系统或环境的容易程度是指软件的( )。
A.容性
B.可移植性
C.容错性
D.可接近性
[判断题]低压断路器是用于电路中发生过载、短路和欠电压等不正常情况时,能自动分断电路的电器。()
A.正确
B.错误
[不定项选择题]患者,男性,50岁,间歇性上腹不适4年,餐后加重,嗳气,胃液分析,基础酸分泌量为0(正常1~2nnnoL/L)最大酸分泌量5mmol/L,(正常17~23mmol/L)。
患者目前以腹胀为主,对此应选用何种药物最好
A.甲硝唑
B.生胃酮
C.多潘立酮
D.阿托品
E.西咪替叮
[单选题]无人机飞行人员在执行飞行任务时,应当随身携带
A.飞行记录本
B.飞机适航证书
C.驾驶员执照或合格证
[单选题]
在电化区段雨天作业人员要穿雨衣,禁止使用( ),不准在支柱下、机车、车辆下避雨。
A.口罩
B.浸塑手套
C.雨伞
D.胶鞋
[判断题]遇湿易燃物品是指遇水或受潮时,发生剧烈化学反应,放出大量的易燃气体和热量的物品,有些不需明火,即能燃烧或爆炸。
A.正确
B.错误
[单项选择]
Euthanasia has been a topic of controversy in Europe since at least 1936. On an average of six times a day, a doctor in Holland practices "active" euthanasia: (1) administering a lethal drug to a (2) ill patient who has asked to be relieved (3) suffering. Twenty times a day, life prolonging treatment is withheld or withdrawn (4) there is no hope that it can (5) an ultimate cure. "Active" euthanasia remains a crime on the Dutch statute books, punishable (6) 12 years in prison. But a series of court cases over the past 15 years has made it clear that a competent physician who (7) it out will not be prosecuted.
Euthanasia, often called "mercy killing", is a crime everywhere in Western Europe. (8) more and more doctors and nurses in Britain, Germany, Holland and elsewhere readily (9) to practicing it, most often in the "passive" form of withholding or withdrawing (10) A. patients
B. subjects
C. residents
D. physicians
[单项选择]向量组α1,α2,…,αs线性无关的充分条件是
A. α1,α2,…,αs都不是零向量.
B. α1,α2,…,αs除去向量组本身的任意部分向量组都线性无关.
C. 向量组α1,α2,…,αs的秩等于s.
D. α1,α2,…,αs中任意两个向量都线性无关.
[单选题]【配电安规】链条(手扳)葫芦使用前应检查吊钩、链条、转动装置及制动装置,吊钩、链轮或倒卡变形以及链条磨损达直径的( )时,禁止使用。
A.0.07
B.0.1
C.0.15
D.0.2
[多项选择]食物中毒的特征是() 。
A. 恶心、呕吐
B. 潜伏期短
C. 有共同的致病物质
D. 病人与健康人之间不传染
E. 发病人数呈突然上升又迅速下降的趋势
[单选题]开采容易自燃、自燃煤层及地温高的矿井,采煤工作面应设置温度传感器,温度传感器的报警值为
A.10℃
B.26℃
C.30℃
D.34℃
[多选题]水域救援时,必须着( )或( )等水域救援防护装备,水下救援必须佩戴( ),冰面救援应着( )。( )
A.专用救生衣
B.灭火战斗服
C.激流救生衣
D.抢险救援服
E.潜水装备
F.冰面救援防护服
[单项选择]注册商标需要变更注册商标标识的,需要()。
A. 重新申请
B. 提出补充申请
C. 提出变更申请
[单项选择] In the United States the science of climate change still remains a controversial issue. Part of the problems is that it is complex and hard to isolate its parts. We do know how vital it is to life. The atmosphere forms a gaseous, protective envelope around earth protecting the earth from the cold of space, from harmful ultraviolet light, and from all but the largest meteors. After traveling over 93 million miles, solar energy strikes the atmosphere and earth’’s surface, warming the planet and creating what is known as the "bio sphere" which is the region of earth capable of sustaining life. Atmospheric circulation is one important reason that life on earth can exist at higher latitudes because equatorial heat is transported poleward, moderating the climate.
The atmosphere is not just a protector but also a great transporter. The transport of water vapor in the atmosphere is an important mechanism by which heat energy is redistributed poleward. Heat energy absorbed at the equator
A. live in the depths of the ocean
B. are one-celled
C. have survived through the ages
D. demonstrates climatic changes prior to humans
[多选题]以下说法哪些是正确的()
A.如果几个动态路由协议都找到了到达同一目标网络的最佳路由,这几条路由都会被加入路由表中
B.路由优先级与路由权值的计算是一致的
C.路由权的计算可能基于路径某单一特性计算,也可能基于路径多种属性。
D.动态路由协议是按照路由的路由权值来判断路由的好坏,并且每一种路由协议的判断方法都是不一样的
[单选题]低温或高温环境下作业,应采取保暖和防暑降温措施,作业时间不宜过长。
A.正确
B.错误
C.略
D.略
E.略
F.略
[简答题]Rosa and Alexei are partners in a successful unlimited partnership. Rosa is highly ambitious and wishes to pursue rapid growth, but Alexei does not want to take unnecessary risks and is satisfied with the business as it is currently structured.
Rosa has been taking decisions that exceed her authority under the partnership agreement. She recently ordered expensive new IT equipment. Alexei is angry as he considers the equipment to be far too sophisticated for the needs of the business in the foreseeable future. Rosa argues that the business needs to invest heavily to build on its success.
The partners meet to resolve their differences. Alexei demands that the IT equipment, which is now installed and ready for use with new software, be returned to the supplier. The supplier of the equipment has submitted its invoice and this is due for payment immediately. Rosa refuses to agree to return the equipment.
Required:(b) Explain what Alexei must do if he wishes to withdraw from the par
[单选题]BF0l9放喷管线拐弯处夹角不小于( )。
A.70°′
B.80°
C.12D“
D.1D0°
[单项选择]
Computers are now being pushed into schools. We know that multimedia will make (21) easy and fun. Children will happily learn from (22) characters while taught by expertly (23) software. Who needs teachers when you’ve got (24) education These expensive toys are difficult to use in the classrooms and (25) extensive teacher training. Sure, kids love video games (26) think of your own experience: can you (27) even one educational filmstrip of many years ago I’ll (28) you remember the two or three great teachers who made a (29) in your life.
Then there’s cyberbusiness. We’re promised (30) catalog shopping -- just point and click for great deals. We’ll order airline tickets (31) the network, book restaurants and negotiate sales (32) . Stores will become obsolete. So how come my local mall does more (33) in an after- noon than the entire Internet (34) <
A. reserves
B. handles
C. subscribes
D. transmits
[简答题]
①一幅地图,一张照片,一个动作,如果要通过电报或电话让对方了解,那是太不容易了。即便你有很强的表达能力,也很难说得清、道得周全。如果有这样一种通信方式,它能把写在纸上的字,以及活动的或静止的画面、景物从千里之外传送到你的面前,那你不就成了“千里眼”了吗图像通信是能够帮助你实现
上述愿望的一种通信方式。
②用简要的话来概括,图像通信是______。
③这句话的意思至少包含下面三层意思:
④第一,它说明,图像通信是传送什么样的信息的。它传送的不是语言,也不是符号和数据,而是难以用语言、符号等表示的活动的或不活动的图像。
⑤第二,它是靠现代电信手段来传送信息的。有的图像信息,通过普通电话电路便能传送。譬如,有一种电话传真机,就接在电话网上,既可以通电话,又可以传图表、照片。当然,也有一些图像信息,需要为它们提供频带比电话电路更宽的信道。例如,被人们传为美谈的国际电视会议,就是靠卫星通信电路将分散在各国的分会场连接起来,实现声音和图像的传送。
⑥现代图像通信不仅具有“迅速”的特点,而且安全、可靠,适合于在各种复杂的环境下应用。例如,在现代战争中,带有摄像机的炮弹弹头在射到敌占区后,能把敌占区的防御情况拍摄下来,用无线电波将图像发回;卫星发射、原子弹爆炸等现场实况,也可以通过图像通信手段传送到指挥部乃至全国电视观众面前。由于它是通过电信手段来传送的,因而首先要把可视的信息变成为适合于电路传输的,电信号,然后再传送出去,到对方后,再把电信号忠实地还原成可视信息为人眼所接收。
⑦第三,图像通信是一种应用视觉的通信,接收者收到的是图像,它可以是像传真照片那样的硬拷贝,也可以是像电视电话那样把影像显示在荧光屏上而不作记录(有人称它为“软拷贝”)。不管是哪种情况,最后都是通过人的双眼观察到的。人眼所看到的信息包括人或物的形状、位置、大小以至色彩、表情等,比起语言所能表达的要丰富得多。
第⑥段说明了“现代图像通信”的______的特点。
其具体表现是(1)____________________________________
(2)_______
[单项选择]通过读《稻草人》这本书,你认为下列正确的是()。
A. 含羞草代替不合理的世间而害羞
B. 熊夫人的幼稚园开办得很好
[判断题]主通风机停电停风,造成瓦斯超限是无关紧要的一件事情。
[单项选择]钢材冷加工后下列有关性能将产生变化:①屈服极限提高、②屈强比下降、③伸长率减小、④抗拉强度提高、⑤冲击韧性提高,下列何者正确()
A. ①②③
B. ①③④
C. ①②④
D. ③④⑤
[判断题]( )233、票亭内AFC设备使用的插座可以外接其他小功率的电器。
A.正确
B.错误
[单项选择]关于代谢酶促动态法测定的叙述哪个是正确的()
A. 一般不需设置样品空白
B. 为保证测定线性,所用酶的Km应尽量小
C. 产物的堆积对反应的影响较大
D. 不需设防止底物耗竭的参数
E. 孵育温度波动,测定结果不受影响
[简答题]The following is part of Information for Environment Pollution. After reading it, you are required to find the items equivalent to (与......等同) those given in Chinese in the table below. Then you should put the corresponding letters in the brackets on the Answer Sheet, numbered 51 through 55.
A--heavy metals
B--hospital wastes
C--industrial emissions
D--industrial noise
E--motor vehicle emissions
F--noise pollution
G--plastic wastes
H--rubber waste
I--pollution control technology
J--smoke prevention
K--recycling
L--waste use
M--water reuse
N--oil spills
O--trash
QUESTIONS:
51. ( )污染控制技术 ( )回收
52. ( )防烟 ( )医院废物
53. ( )重金属 ( )石油泄漏
54. ( )水的再利用 ( )工业排放物
55. ( )噪声污染 ( )废物,垃圾
[判断题]区间隧道内安装有手动报警按钮、消火栓按钮和感烟探测器。( )
A.正确
B.错误
[单选题]火灾自动报警系统中用于人工触发报警信号的设备是( )。
A.火焰探测器
B.手动火灾报警按钮
C.声光警报器
D.扩音对讲话站
[单选题]后滚翻的保护与帮助的站位是练习者的( )。
A.正前方
B.前侧方
C.正后方
D.后侧方
[单选题]无论13号车钩还是17型车钩,当车钩处于闭锁状态时,应( )。
A.动作灵活
B.具有防跳作用
C.保证各部无间隙
D.将锁提(推)铁卡死不能活动