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[单项选择]在输送功率相同或可靠性指标相当的条件下,直流输电与交流输电相比,虽然换流站的投资比变电站的投资要高,但直流输电线路的投资比交流输电线路的投资要低。如果当输电距离增加到一个定值时,采用直流输电线路所节省的费用,刚好可以抵偿换流站所增加的费用,这个距离叫什么?()
A. 技术等价距离
B. 相等距离
C. 投标距离
D. 经济等价距离

热门试题:

[判断题]浮顶、内浮顶常温储罐所储存的货物允许温度范围为-20~90℃。( )
A.正确
B.错误
[单选题]浮点加减中的对阶的方法是( )。
A.将较大的一个阶码调整到与较小的一个阶码相同
B.将较小的一个阶码调整到与较大的一个阶码相同
C.将被加数的阶码调整到与加数的阶码相同
D.将加数的阶码调整到与被加数的阶码相同
[单选题]采用电话闭塞法组织行车时,车站发车凭证为车站人员显示的()。
A.A.路票
B.B.“好了”手信号
C.C.发车手信号
D.D.通过手信号
[单项选择]随着技术和认识水平的提高,下列哪项检查被临床更普遍地用于对支气管扩张症的诊断
A. 数字化高清晰胸部X线平片检查
B. 高分辨胸部CT检查
C. 胸部MRI检查
D. 胸部PET检查
E. 胸部核素扫描检查
[不定项选择题]患儿,女,10个月。因面色苍白2个月来医院就诊。患儿生后单纯母乳喂养,未添加辅食。查体:精神萎靡,营养发育较差,反应迟钝,皮肤黏膜和甲床苍白,头发枯黄,前囟2cm×3cm,心肺无异常,肝肋下2cm,脾肋下1.5cm。血红蛋白70g/L,血涂片见红细胞体积小,含色素低。 用药后的表现为
A.3~4天网织红细胞上升
B.3~4周后网织红细胞上升
C.3~4天血红蛋白逐渐上升
D.2~3周血红蛋白逐渐上升
E.血红蛋白与网织红细胞同时增加
[判断题]砌筑砂浆的技术性质主要包括新拌砂浆的密度、和易性、硬化砂浆强度和对基面的粘力、抗冻性、收缩值等指标。
A.正确
B.错误
[单项选择]Watch a baby between six and nine months old, and you will observe the basic concept of geometry being learned. Once the baby has mastered the idea that space is three dimensional, itreaches out and begins grasping various kinds of objects. It is then, from perhaps nine to fifteen months, that the concepts of sets and numbers are formed. So far, so good. But now an ominous development takes place. The nerve fibers in the brain insulate themselves in such a way that the baby begins to hear sounds very precisely. Soon it picks up language, and it is then brought into direct communication with adults. From this point on, it is usually downhill all the way for mathematics, because the child now becomes exposed to all the nonsense words and beliefs of the community into which it has been so unfortunate as to have been born. Nature, having done very well by the child to this point, having permitted it the luxury of thinking for itself for eighteen months, now abandons it to the arbitrary con
A. The impact of language on mathematics
B. Children’s ability to learn languages
C. How basic concepts of physics are learned
D. Math-learning strategies for babies
[简答题]双伸缩立柱的组成不包括()。
[单项选择]
{{B}}TEXT A{{/B}}

Thomas Jefferson, who died in 1826, looms ever larger as a figure of special significance. Americans, of course, are familiar with Jefferson as an early statesman, author of the Declaration of Independence, and a high-ranking presidential Founding Father. But there is another Jefferson less well known. This is the Jefferson who, as the outstanding American philosopher of democracy, has an increasing appeal to the world’ s newly emerging peoples.
There is no other man in history who formulated the ideas of democracy with such fullness, persuasive ness, and logic. Those interested in democracy as a poetical philosophy and system--even those who do not accept his postulates or are critical of his solutions--must reckon with his thought.
What, then, is his thought, and how much of it is still relevant under modem conditions
Of all the ideas and beliefs that make up the political philosophy know
A. Suffrage and election.
B. Checks and balances.
C. The two politics to limit power and to control power.
D. The dividing of functions among many entities.
[单项选择]血栓前状态的基础疾病除外
A. 肾病
B. 严重贫血
C. 糖尿病
D. 长期服用避孕药
E. 甲状腺功能低下
[多选题]擅自在公安信息网上开设与工作无关的(),给予警告处分;造成严重后果的,给予记过以上处分
A.游戏服务器
B.聊天室
C.BBS网站
D.个人网站
[单项选择]甲公司2016年销售收入为2200万元,当年发生的与生产经营活动有关的业务招待费支出为60万元,且能够提供有效凭证。甲公司在计算当年企业所得税应纳税所得额时,准予扣除的业务招待费为()万元。
A. 11
B. 60
C. 36
D. 50
[单项选择]

Itzhak Perlman was born in Israel. But his music has made him a citizen of the world. He has played in (16) every large city. He has won fifteen Grammy Awards and four Emmys.
Perlman suffered a terrible disease which hurt his (17) at four. Today he uses a wheelchair or walks with crutches(拐杖). But none of these (18) him from playing the violin. As a young child, he took his first lessons at the Music Academy of Tel Aviv. Very quickly, his (16) talent was recognized. At the age of thirteen he went to the United States to (20) on television. His playing led him to the Juilliard School in New York.
His music is full of power and strength. It can be (21) or joyful, loud or soft. But people say it is not the music (22) that makes his playing so particular. They say he is able to show the joy he (23) in playing, and the feelings that great music can express.

Anyone who has attended (出席) h
A. practise 
B. watch 
C. appear 
D. train

[判断题]钝化是酸洗作业的一个主环节。
A.正确
B.错误
[判断题]各级防洪地点属于系统专业应急预案。
A.正确
B.错误
[单项选择]心室肌有效不应期的长短主要取决于
A. 动作电位0期去极的速度
B. 动作电位1期的长短
C. 动作电位2期的长短
D. 动作电位3期的长短
E. 阈电位水平的高低
[多选题]工作间断,若接地线拆除,恢复工作前应( )( )。间断后继续工作,若无工作负责人或专责监护人带领,作业人员不得进入工作地点。
A.重新验电
B.架设围栏
C.装设接地线
D.悬挂标识牌
[简答题]综合课程
[多选题]一枚完整的导弹由哪些要素组成( )
A.战斗部
B.动力装置
C.制导系统
D.本身是一个飞行器
[单项选择]() in 1636, Harvard is one of the most famous universities in the United States.
A. Being rounded
B. it was founded
C. Founded
D. Founding
[单选题]某企业现发现安全事件主要是由于内部管理不善导致,那么该企业解决该问题最切实的办法是:( 2 分)
A.基于网络安全的整体性要求建立统一的安全策略和基于工作流程的管理
B.加强对网络环境的管理,做好各种故障及安全问题及时告警
C.提高安全的整体防御能力,使用专门的配置管理平台进行管理
D.加强安全管理,加大对违规员工的处罚
[单选题]65、相邻两幅卷材短边搭缝应错开,且不得小于()
A.A.300mm
B.B.500mm
C.C.600mm
D.D.400mm
[单项选择]货币之间的收付业务应编制( )。
A. 收款凭证
B. 付款凭证
C. 转账凭证
D. 原始凭证
[填空题]四显示自动闭塞区段的进站色灯信号机显示一个绿色灯光,准许列车按规定速度经道岔直向位置进入或通过车站,表示运行前方至少有()闭塞分区空闲。J415
[单选题]3.93.第93题
变压器温度上升,绕组直流电阻变小。( )
A.正确
B.错误
[单项选择]《传染病防治法》规定,传染病暴发、流行时,县以上地方人民政府应当()
A. 立即组织力量进行防治,切断传染病的传播途径
B. 公告限制或者停止集市、集会等人群聚集活动
C. 公告停业、停工、停课
D. 封闭可能造成传染病扩散的场所
E. 宣布为疫区
[多选题]安自装置验收结束后,未经验收人员许可,不能改动( )
A. 装置硬件设置;
B. 定值区号;
C. 装置定值;
D. 二次回路接线。
E.略
F.略
G.略
H.略
[判断题]( )位移观测桩必须预先埋设牢固,桥上位移观测桩应设置在固定端(调节器设置位移观测桩除外),内侧应距线路中心不小于3.1m。
A.正确
B.错误
[单选题]根据总行规定,以下关于根据第三方快捷支付的说法,错误的是:()。
A.农行掌银开立的电子账户可在绑定第三方平台快捷支付。
B.我行对公账户支持绑定支付宝等快捷支付。
C.我行账户(含借记卡、贷记卡)绑定快捷支付时,农行无数量限制,具体规则详询对应支付平台。
D.快捷支付签约的短信验证码,签约完成的通知,解约完成的通知,这些都是农行发送短信和验证码,短信发送端口为95599。
[单选题]放起落架后,机组观察到起落架面板上的前起落架指示绿灯不亮,后顶板上的左主起落架
指示绿灯也不亮,其它指示正常,此时起落架的放下状态是什么?
A.只有起落架轮前没有放下锁定
B.只有左主起落架没有放下锁定
C.前起落架和左主起落架都没有放下锁定
D.所有起落架都已经放下锁定
[单选题]单位借记卡允许办理( )。
A.现金开卡
B.现金开卡或转账开卡
C.转账开卡
D.以上均正确
[多选题]高价值专线用户如果要拆机,客户经理需进行“三必”动作,即必( )、必( )、必( )。
A.说明
B.挽留
C.回访
D.融合
[单项选择]0.15³2.48得数保留两位小数是()。
A. 0.38
B. 0.37
C. 0.372
[多选题]()的二次回路变动时,应及时更改图纸,并按经审批后的图纸进行。
A.继电保护装置
B.配电自动化装置
C.安全自动装置和仪表
D.自动化监控系统
[单项选择]This time next week I'll be on vacation. Probably I ( ) on a beautiful beach.
A. am lying
B. have lain
C. will have lain
D. will be lying
[单项选择]

患儿9岁,自幼发现心脏杂音,近2年来有明显活动后气促,体查发现胸骨左缘第2肋间有Ⅳ级收缩期吹风样杂音,心电图示右心室肥大,导管检查右心室与肺动脉收缩期压力阶差为为10kPa(75mmHg)。

该病人术前准备不包括下列哪项( )
A. 检查肝功能、肾功能
B. 检查电解质
C. 准备血源
D. 应用强心甙
E. 检查有否感染灶存在

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