热门试题:
[判断题]鸟巢类是指鸟类在杆塔上筑巢时,较长的鸟巢材料减小或短接空气间隙,导致的架空输电线路跳闸。( )
A.正确
B.错误
[单项选择]探伤时，若提高声波的频率，则介质中：（）
A. 声速加快
B. 声速减低
C. 声速不变
D. 声速有时减低有时加快
[单选题]滤油机设置专用电源，外壳接地电阻不得大于（）。
A.4
B.6
C.8
D.10
E.略
F.略
[填空题] 涂有( )标记的车辆，禁止通过机械化驼峰。
[单项选择]设在因子共有r个水平，每个水平下抽n个单位的样本数据。则（）
A. SST、SSA和SSE的自由度分别是：（nr-r）、（r-1）、（nr-r）
B. SST、SSA和SSE的自由度分别是：（nr-1）、（r-r）、（nr-1）
C. SST、SSA和SSE的自由度分别是：（nr-1）、（r-1）、（nr-r）
D. SST、SSA和SSE的自由度分别是：（nr-1）、（nr-r）、（r-1）
[不定项选择题]共用题干
Science and Technology
There is a difference between science and technology.______(46)Science has to do with discovering the facts and relationships between observable phenomena in nature and with establis- hing theories that serve to organize these facts and relationships;technology has to do with tools, techniques,and procedures for applying the findings of science.______(47)
Progress in science excludes the human factor. Scientists,who seek to understand the uni- verse and know the truth within the highest degree of accuracy and certainty,cannot pay attention to their own or other peoples likes or dislikes or to popular ideas about the fitness of things. ______(48)But even an unpleasant truth is more than likely to be useful;besides,we have the choice of refusing to believe it!But hardly so with technology;we do not have the choice of refusing to hear the sound produced by a supersonic（超音速的）aircraft flying overhead ; we cannot refuse to breathe polluted air.______(49)The purpose of technology is to serve peo- ple—people in general,not merely some people;and future generations,not merely those who presently ish to gain advantage for themselves.
______(50)Many people blame technology itseff for widespread pollution,resource depletion（枯竭）and even social decay in general-so much so that the promise of technology is “obscured”.That promise is a cleaner and healthier world.If wise applications of science and technology do not lead to a better world,what else will?
______(47)
A.Another distinction between science and technology has to do with the progress in each.
B.Unlike science,progress in technology must be measured in terms of the human factor.
C.What scientists discover may shock or anger people—as did Darwin'S theory of evolu-tion.
D.Science and technology are different.
E.We are all familiar with the improper use of technology.
F.Science is a method of answering theoretical questions;technology is a method of solving practical problems.
[判断题]（ ）线间距离不足3.6 m时，警冲标设在两线路中心线最大间距的起点处。
A.正确
B.错误
[单选题]办理借记卡无卡存款业务时，存现金额在（）（含）以上的，客户需提供存款人姓名．有效身份证件和联系方式。
A.5000元
B.1万元
C.5万元
D.10万元
[多项选择]阿片类药物的作用包括（ ）
A. 缩瞳作用
B. 抑制呼吸、咳嗽中枢和胃肠蠕动
C. 作用于中脑边缘系统，产生强烈的快感
D. 镇痛、镇静作用
E. 兴奋呕吐中枢
[多项选择]住房消费，它是指居民为取得住房提供的庇护、休息、娱乐和生活空间的服务而进行的消费，这种消费的实现形式可以是租房也可以是买房，以下人群中理财规划师最有可能给予租房建议的是（）。
A. 刚刚踏入社会的青年
B. 经常在各个城市转换工作的人
C. 储蓄不多的家庭
D. 不急需买房且看不清房价走势的人
E. 中年白领阶层人士
[多项选择]烧伤应激性溃疡的病理特点是
A. 胃部病变多发于胃窦、胃大弯及胃底部
B. 溃疡数目常为多个
C. 溃疡一般呈圆形或卵圆形，边缘整齐
D. 溃疡以胃窦部最多见
E. 溃疡边缘缺乏炎症反应
[单项选择]
C is sometimes referred to as a ’high -level （） language’. Some people think that’s an insult, but it’s actually a deliberate and significant aspect of the language. If you have （） in assembly language, youll probably find C very natural and comfortable (although if you continue to focus too heavily on machine - level details, youll probably end up with unnecessarily non- portable programs). If you havent programmed in assembly language, you may be frustrated by C ’s lack of certain higher - level features. In either case, you should understand why C was de- signed this way: so that seemingly - simple constructions expressed in C would not expand to arbitrarily expensive ( in time or （） ) machine language constructions when （） . If you write a C program simply and succinctly, it is likely to result in a succinct, efficient machine language executable. If you find that the （） resulting from a C program is not efficient, it’s probably because of
A. compiled
B. translated
C. accumulated
D. gathered
[多选题]应收日报的单位有(____)。
A.kWh
B.元/kWh
C.元
D.户
[填空题] President Clinton later today joins (S1)________ President Ford. Carter and Bush at "the president’’s summit or America s future (S2) ________ at recruiting one million volunteer tutors to provide after-school, weekend and summer reading help for up to three million children. Mr. Clinton will ask Congress this coming week for nearly three (S3) ________ dollars to fund a five-year program called "America Reads".
The program would fund the (S4,) ________ efforts of 20 thousand reading (S5) ________ and it would also give (S6) ________ to help parents help children read by the third grade, or about age eight. During his Saturday radio (S7) ________, the president explained why the program is important; "we ’’need ’’ America Reads’’ and we need it now. Studies show that if the fourth-graders fail to read well, (S8)____________________. But, 40 percent of them still can’’t read at a basic level."
Volunteer tutors, who provide community service in exchange for college funding a
[填空题]标度变换的目的是将不同（）的信号，或者不同（）的信号统一起来。
[简答题]在打印演示文稿时，在一页纸上能包括几张幻灯片缩图的打印内容称作什么？
[判断题]预告、驼峰、驼峰辅助信号机，显示距离不得小于200米。
A.正确
B.错误
[单选题]每台机车入库后CIR设备日常检修项目有（ ）项。
A.9
B.10
C.11
D.12
[单选题]珠光体是( )在特定温度下组成的机械混合物。
A.铁素体和渗碳体
B.铁素体和奥氏体
C.奥氏体和渗碳体
D.奥氏体和马氏体
[单选题]下列哪个分子属于选择素家族
A.CD41
B.CD51
C.CD61
D.CD62P
E.CD18
[单选题]具有维系六阴经作用的是
A.任脉
B.冲脉
C.带脉
D.阴脉
E.阴维脉
[单选题] 在连续射击时,食指扣动扳机的特点是“两快一慢”,即( )。[1分]
A.构成瞄准要快,松开扳机要快,击发瞬间要慢
B.预压扳机要快,松开扳机要快,击发瞬间要慢
C.扣压扳机要快,松开扳机要快,预压扳机要慢
D.预压扳机要快,扣压扳机要快,松开扳机要慢
[单选题]对稍不均匀电场,空气间隙的平均击穿场强与均匀电场的相比要()。
A.相等
B.高
C.低
[单项选择]( )属于特殊能力测试。
A. SDS
B. DAT
C. COPS
D. RIT
[判断题]液压传动中液压油有润滑、 冷却和密封等作用。
A.正确
B.错误
[判断题] 工作中应随时注意油位高度和温升,一般油液的工作温度在35~60℃较合适。(易)( )
A.正确
B.错误
[单选题]( )的臂架是由铰接的多节臂组成，车辆处于行驶状态时，臂架折叠；工作状态时，通过各自的变幅机构举升臂架。
A.曲臂举高消防车
B.直臂举高消防车
C.伸缩臂消防车
D.组合臂举高消防车
[单项选择]在室温下，把10克食盐溶于90克水里，所得溶液的质量分数是（）。
A. 10%
B. 11.1%
C. 90%
D. 大于11.1%
[单选题]在高合金钢(如18-8不锈钢)中，氢的扩散速度很小，但溶解度较大，因此不会在局部地区发生聚集而产生（）裂纹。
A.结晶
B.延迟
C.再热
D.液化
[单选题]螺杆钻具( )的主要作用是将螺杆的偏心旋转转化为主轴的同心旋转，并把螺杆的轴向水力载荷和扭矩传给主轴。
A. 传动轴总成
B. 驱动接头
C. 液马达总成
D.万向轴
[单选题]处置液态危险化学品和腐蚀性物品事故时，应穿着( )。
A. 特级化学防护服
B. 一级化学防护服
C. 二级化学防护服
D. 三级化学防护服
[简答题]“会当凌绝顶，一览众山小”说的是中国的哪座名山？
[单选题]ZYJ7转辙机（）的作用是改善电机启动特性，防止电流突变。（）
A.溢流阀
B.油缸
C.油泵
D.启动油缸
[单选题]下列事故统计指标中,属于绝对指标的是()。
A.直接经济损失
B.百万工时伤害率
C.百万吨死亡率
