热门试题:
[单选题]处置高浓度、强渗透性气态危险化学品事故时,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
[单项选择]下述关于加热导致DNA变性的叙述,不正确的为
A. 黏度降低
B. 紫外光吸收值降低
C. 热变性的DNA经缓慢冷却后即可复性
D. 50%双链结构被解开时的温度称为DNA的Tm
[单项选择]建设单位应当向施工单位提供施工现场及毗邻区域内供水、排水、供电、供气、供热、通信、广播电视等地下管线资料,气象和水文观测资料并保证资料的()。
A. 真实、系统、合理
B. 准确、合理、适用
C. 真实、准确、完整
D. 完整、适用、可靠
[填空题]网络物理结构可归结为以下几类:()、()、()、()拓扑结构。
[判断题]【永久负载】微动开关位于司机室继电器柜。
A.正确
B.错误
[不定项选择题]共用题干
第一篇
Forecasting Methods
There are several different methods that can be used to create a forecast. The method a forecaster chooses
depends upon the experience of the forecaster,the amount of information available to the forecaster,the level of
difficulty that the forecast situation presents,and the degree of accuracy or confidence needed in the forecast.
The first of these methods is the persistence method,the simplest way of producing a forecast.The per-
sistence method assumes that the conditions at the time of the forecast will not change.For example,if it is
sunny and 87 degrees today,the persistence method predicts that it will be sunny and 87 degrees tomorrow.
If two inches of rain fell today,the persistence method would predict two inches of rain for tomorrow.
However,if weather conditions change significantly from day to day,the persistence method usually breaks
down and is not the best forecasting method to use.
The trends method involves determining the speed and direction of movement for fronts,high and low
pressure centers , and areas of clouds and precipitation(降水量).Using this information , the forecaster can
predict where he or she expects those features to be at some future time.For example,if a storm system is
1,000 miles west of your location and moving to the east at 250 miles per day,using the trends method you
would predict it arrive in your area in 4 days.The trends method works well when systems continue to move
at the same speed in the same direction for a long period of time.If they slow down,speed up,change intensi-
ty,or change directions,the trends forecast will probably not work as well.
The climatology(气候学)method is another simple way of producing a forecast. This method involves
averaging weather statistics accumulated over many years to make the forecast.For example,if you were using
the climatology method to predict the weather for New York City on July 4th,you would go through all the
weather data that has been recorded for every July 4th and take an average.The climatology method oniy
works well when the weather pattern is similar to that expected for the chosen time of year. If the pattern is
quite unusual for the given time of year,the climatology method will often fail.
The analog method is a slightly more complicated method of producing a forecast.It involves examining
today's forecast scenario(模式)and remembering a day in the past when the weather scenario looked very
similar(an analog).The forecaster would predict that the weather in this forecast will behave the same as ii
did in the past.The analog method is difficult to use because it is virtually impossible to find a predict ana-
log.Various weather features rarely align themselves in the same locations as they were in the previous time.
Even small differences between the current time and the analog can lead to very different results.
The analog method should not be used in making a weather forecast when________.
A.the current weather scenario is different from the analog
B.the analog looks complicated
C.the analog is more than 10 years old
D.the current weather scenario is exactly the same as the analog
[单项选择]根据《民法总则》的规定,民事主体因同一行为应当承担民事责任、行政责任和刑事责任的,承担行政责任或者刑事责任不影响承担民事责任,民事主体的财产不足以支付的,()。
A. 优先清偿诉讼费用
B. 适当减免相关责任
C. 申请行政救济
D. 优先用于承担民事责任
[单选题]工作票有效期不得超过( )个工作日(且是作业范围、内容、人员、安全措施均不变的情况下),工作间断超过24小时应重新填发工作票。
A.一
B.二
C.三
D.四
[填空题]在Word 2003中,要在页面上插入页眉、页脚,应使用______菜单中的“页眉和页脚”命令。
[单选题]下列哪项不属于急性中毒时提供毒物鉴定的标本( )
A.呕吐物
B.胃液
C.剩余食物
D.尿与粪
E.脑脊液
[填空题]原子磁矩来源于三个方面()、()和()。
[单选题]交流电源的电缆(线)在机房内必须与通信线缆分开布放。交流电源电缆在()以上时,与通信线缆分开布放的间隔应不小于600mm。
A.
5kVA
B.
8kVA
C.
10kVA
D.
15kVA
[单项选择]环境问题是指 ( )
A. 生态破坏
B. 环境污染
C. 温室效应
D. 生态破坏和环境污染
[单选题]斜井(巷)施工期间兼作人行道时,必须每隔( )m设置躲避硐并设红灯。
A.20
B.40
C.50
[单项选择]以下对物业管理从业人员应具备的条件的表述,错误的是()。
A. 具有本专业中专毕业以上学历,见习一年期满,经单位考核合格者
B. 按国家有关规定已担任本专业初级专业技术职务或通过专业技术资格考试取得初级资格,经单位考核合格者
C. 在本专业岗位工作,经过国家或国家授权部门组织的从业资格考试合格者
D. 具有个人开办物业服务企业的经验
[判断题]11、公民、法人或者其他组织对行政机关实施行政许可,享有陈述权、申辩权。
A.正确
B.错误
[单选题]非检修人员( )进入“不上人屋面”。
A.允许
B.可以
C.禁止
[判断题]“两学一做”学习教育是学党纪党规、学系列讲话,做合格党员。
A.正确
B.错误
[单项选择]有一完全井,半径r0=0.3m,含水层厚度H=15m,土壤渗透系数k=0.0005m/s,抽水稳定后,井水深h=10m,影响半径R=375m,则由达西定律得出的井的抽水量Q为()。(其中计算系数为1.366)
A. 0.0276m3/s
B. 0.0138m3/s
C. 0.0414m3/s
D. 0.0207m3/s
[多选题]带电灭火时应注意哪些安全事项()
A.必须带电灭火时,与带电体保持必要的安全距离,严禁接触裸露电线、电气开关或在电线下方站立,防止电线熔断伤人
B.带电灭火时,要靠近灭火,抢占阵地优势,防止火势扩大
C.带电灭火可以使用直流水枪,利用水枪冲击力直击火点
D.合理选择灭火剂,采用点射、扫射等方式灭火,必要时采取水枪接地保护
[判断题]并非所有新从业人员均应进行上岗前职业健康检查。
[多选题]根据《立法法》的规定,下列哪些机关有权制定规章?()
A.广州市政府
B.教育部
C.国家工商行政管理总局
D.国家信访局
[多选题]智慧高速六个体系建设为()绿色节能体系、智慧高速标准体系。
A. 快速通行体系
B. 智能监测体系
C. 智慧管服体系
D. 车路协同系统
[单选题] 交流设备外壳必须接地属于( )。
A.工作接地
B.防雷接地
C.保护接地
D.大接地
[单选题]在高压设备上工作,应至少由()人进行,并完成保证安全的组织措施和技术措施。
A.单
B.两
C.三
D.四
[判断题]视频信号传输距离最短的接口是HDMI。( )
A.正确
B.错误
[单选题]当挖掘深度超过( )m且有人员进行沟下作业时,必须按照规定落实放坡及设置保护系统的有关要求。
A.1
B.1.2
C.1.5
D.2
[判断题]程控交换机中的系统程序随交换局外部条件而变。
[不定项选择]法自身存在一定的局限性,下列正确表述的选项是哪些?( )
A. 法不是规律
B. 法的变化往往是落后于现实生活
C. 无法做到处处实现个别正义
D. 对社会事件缺乏及时应对和处理
[单选题]某女性患者,17岁,上前牙刷牙时牙龈易出血,经检查上前牙牙面有较多菌斑堆积,唇侧牙龈肿胀,色暗红,质地松软,诊断为慢性龈炎。关于此患者,以下说法不正确的是
A.治疗后可消除牙龈炎症,但会遗留附着丧失
B.患者自行控制菌斑对疾病的治疗意义重大
C.治疗后牙龈形态仍不恢复者可行手术治疗
D.定期复查和维护才能保持疗效
E.此疾病可以预防,也容易复发
[单选题]沈阳地铁整流变压器( )温度报超温跳闸。
A.100
B.110
C.150
D.130
[判断题]施工操作人员在作业活动后可以穿拖鞋、赤背(女职工禁穿高跟鞋)进入现场。( )
A.正确
B.错误
[判断题] ( )通过两种相同方式的输出指定主轴(可变速电动机并配置相应的强电电路)转速叫主轴变速。
A.正确
B.错误
[单项选择]航空运输国际公约是()
A. 《海牙规则》
B. 《维斯比规则》
C. 《汉堡规则》
D. 《华沙公约》
[单项选择]同步电动机通常应工作在()。
A. 欠励状态
B. 正励状态
C. 过励状态
D. 空载过励状态