题目详情
题目详情:

[单项选择]用40KV或50KV的X射线对同一工件照相,两次摄影所获得的结果有什么差异?()
A. 40KV曝光时,衬度高,曝光范围比50KV时大
B. 50KV曝光时,衬度低,曝光范围比40KV时大
C. 40KV曝光时,衬度较低,曝光范围比50KV时大
D. 50KV曝光时,衬度高,曝光范围比40KV时大

热门试题:

[判断题]变压器最热处是变压器的下层1/3处。( )
A.正确
B.错误
[不定项选择题]共用题干 第二篇

Three Ways to Become More Creative

Most people believe they don't have much imagination.They are wrong. Everyone has imagination,but
most of us,once we become adults,forget how to access it. Creativity isn't always connected with great works
of art or ideas.People at work and in their free time routinely think of creative ways to solve problems.Maybe
you have a goal to achieve,a tricky question to answer or you just want to expand your mind!Here are three
techniques to help you.
This technique involves taking unrelated ideas and trying to find links between them.First,think about
the problem you have to solve or the job you need to do.Then find an image,word,idea or object,for exam-
pie,a candle.Write down all the ideas/words associated with candles:light,fire,matches,wax,night,silence,
etc.Think of as many as you can?The next stage is to relate the ideas to the job you have to do?So imagine
you want to buy a friend an original present,you could buy him tickets to a match or take him out for the
night.
Imagine that normal limitations don't exist. You have as much time/space/money,etc.as you want.
Think about your goal and the new possibilities.If,for example,your goal is to learn to ski,you can now prac-
tice skiing every day of your life(because you have the time and the money).Now adapt this to reality.May-
be you can practice skiing every day in December,or every Monday in January.
Look at the situation from a different point of view. Good negotiators(谈判者)use this technique in business;
and so do writers.Fiction writers often imagine they are the characters in their books.They ask questions:
what does this character want?Why can't she get it?What changes must she make to get what she wants?
What does she dream about?If your goal involves other people,put yourself" in their shoes".The best fisher-
men think like fish! The second technique suggests that you just imagine _______________.
A.setting a goal is as simple as skiing
B.you have every resource to achieve your goal
C.new possibilities will soon appear
D.December and January are the best months for skiing
[多选题]照明工程中,常用的光度量有( )。
A.A.光通量;
B.发光强度;
C.照度;
D.亮度
[单选题]陀螺经纬仪的工作范围为地理南北纬度()内,在此范围内,一般不受时间和环境等条件限制,可实现快速定向。
A.30°
B.45°
C.60°
D.75°
[单项选择]厨房安全用电管理按要求选用的保险是指______。
A. 铁丝
B. 熔丝
C. 铜线
D. 铝线
[单选题]不属于防治霉变方法的是
A.高温快速烘干法
B.石灰干燥法
C.太阳晾晒法
D.冷藏法
E.低温烘干法
[判断题]在4级及以上的大风以及暴雨、雷电、冰雹、大雾、沙尘暴等恶劣天气下,应停止露天高处作业。
A.正确
B.错误
[单选题]在WORD中输入三个( ),回车就是一条双直线。
A.~
B.*
C.!
D.=
[多选题]消除燃气阀门填料泄漏的方法是( )。
A.正确选用填料
B.按正确方法装填
C.采取保护措施,防止锈蚀,已经锈蚀的除蚀后可不更换
D.填料使用一定时间后,要更换
[单选题]贯彻总体国家安全观,必须坚持党对国家安全工作的绝对领导,坚持()对国家安全工作的集中统一领导
A.中央国安委
B.中央国安办
C.党中央
D.各级党委(党组)
[判断题]动车组一般情况下不得通过半径小于250 m的曲线,通过曲线半径为250 m曲线时,限速15 km/h;不得侧向通过小于9号的单开道岔和小于6号的对称双开道岔。
A.正确
B.错误
[多选题](多选题)新民主主义革命时期,中共实行两次工作重心转移的根本着眼点有( )。
A.敌我力量对比
B.革命对象变化
C.灵活运用马列主义理论
D.革命性质变化
[单项选择]

Unmarried Women Becoming Homeowners
An increasing number of single women are buying their own homes, according to industry experts. By contrast, the figures for unmarried men buying houses or apartments show no increase. What is behind this trend I put the question to analysts at the Real Estate Institute, who came u p with the following observations:
· Women no longer seek marriage and a homemaking role as their first priority, but want a stable job or career instead, and this puts them in a position where they can own a home independently.
· Single men are no longer pressured to "settle down," which traditionally means getting a stable job with a career path and then getting married and buying a house. They tend, therefore, to be less likely to have stable jobs.
· Women are increasingly better qualified and in many areas have surpassed men. This enables them to obtain better and more highly paid jo
A. Men are beginning to show an interest in the real estate market.
B. Men will reclaim the positions they lost to women.
C. Women will continue to invest in homes.
D. Women will resort to marriage for emotional security.

[判断题]在测卡点和进行穿芯打捞时,天滑轮要安装在正对井口的井架上。( )
A.正确
B.错误
[判断题]加仑表示质量的单位。( )
A.正确
B.错误
[多项选择]无领导小组讨论法包括()等多种类型。
A. 无情境性讨论
B. 不定角色的讨论
C. 情境性的讨论
D. 指定角色的讨论
E. 无主题讨论
[单选题]双馈异步发电机定子采用并网。(1.0分)
A.直接
B.软启动
C.变频装置
D.全功率变频装置
[单选题](76643)常用的标准钻头只刃磨二个()和修磨横刃,但在刃磨以后要保证顶角、横刃斜角以及两主切削长短相等,左右等高。(1.0分)
A.主刀面
B.后刀面
C.主后刀面
D.刀背面
[判断题]近代中国是多个帝国主义直接统治的经济落后的半殖民地国家。 ( )
A.正确
B.错误
[判断题]如涉及段场停送电作业的施工,原则上须在计划发车点前30分钟完成销点,且不得延点。
A.正确
B.错误
[填空题]从1999年1月1日起,在比赛中使用的球拍框的总长度,包括拍柄不能超过()。
[单项选择]在工程网络计划中,工作M的最早开始时间为第17天,其持续时间为5天,该工作有三项紧后工作,它们的最迟开始时间分别为第40天、第27天和第30天,则该工作M的总时差为( )天。
A. 13
B. 8
C. 5
D. 3
[单选题]可燃物质在空气中没有外部火花、火焰等火源的作用,靠自身发热或外来热源引发的自行燃烧现象叫()。(易)
A.自燃
B.着火
C.闪燃
D.爆燃
[单选题]装有二级七○七货物的货物的车辆与牵引的电力机车最少隔离( )。
A.1辆
B.2辆
C.3辆
D.4辆
[多项选择]根据下表给定逻辑关系绘制而成的某分部工程双代号网络计划如下图所示,其作图错误包括( )。
A. 工作名称
B. A
C. B
D. C
E. D
F. E
G. G
H. H
I. I
J. 紧后工作
K. C、D
L. E
M. G
N. —
[单选题]顶杆及叉杆只能用于竖立( )m以下的拔梢杆,不得用铁锹、木桩等代用。
A.6
B.8
C.10
D.12
[多选题]()情况下,有载调压开关禁止调压操作。
A.真空型有载开关轻瓦斯保护动作发信时;
B.有载开关油箱内绝缘油劣化不符合标准;
C.有载开关储油柜的油位异常;
D.变压器过负荷运行时,不宜进行调压操作;过负荷1.1倍时,禁止调压操作。
[单项选择]为保证药品质量,对药品经营企业经营的药品进行强制性检验,属
A. 委托检验
B. 抽查性检验
C. 复核性检验
D. 技术仲裁检验
E. 进出口药品检验
[多选题](20多10)根据《水法》,关于水工程保护与建设许可的说法,正确的有( )。(2021版教材330-331页)
A. 对生产建设活动有禁止性规定
B. 生产建设项目有限制性规定
C. 水工程系指水利部门管理建设的工程
D. 水工程的保护范围为水工程设施的组成部分
E. 流域范围内的区域规划应当服从流域规划
[判断题]人民警察对聚众械斗、暴乱等严重破坏社会治安秩序,用其他方法不能制止的犯罪分子,经警告无效,可以使用武器。
A.正确
B.错误
[单项选择]水尺按用途不同分为()、参证水尺、辅助水尺、临时水尺等。
A. 直立式水尺
B. 基本水尺
C. 倾斜式水尺
D. 金属水尺
[填空题]组织实施__,对于激发各级党组织和广大党员的生机活力,具有十分重要的意义。
[填空题]根据等温转变绘制的等温转变曲线有称为()。
[多项选择]文献综述的目的为()。
A. 现状和趋势
B. 了解问题的历史
C. 学习别人的方法
D. 提供背景资料
E. 寻找差距
[判断题] 消防队接警出动必须在规定的时间内赶到事故现场。对飞机火灾的施救时间应能满足应答时间要求。消防车应在能够满足施救时间的位置执勤。
A.正确
B.错误
[单项选择]男性,52岁。有多年吸烟史,出现刺激性干咳伴咯血痰。应首先考虑()
A. 支气管肺癌
B. 肺脓肿
C. 支气管扩张
D. 肺气肿
E. 慢性支气管炎
[单项选择]在施工现场,不得使用未成年工、童工,所有从事施工作业人员年龄不得在()周岁以上。
A. 45
B. 50
C. 55
D. 60

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