4电磁炮是利用运动电荷或载流导体在磁场中切割磁力线,产生的电磁力(洛仑兹力)来加速弹丸,是完全依赖电能和电磁力加速弹丸的一种超高速发射装置。
相关试题
【单选题】
I appreciate ___ to your home.
A. to be invited
B. to have invited
C. having invited
D. being invited
【单选题】
The socks were too small and it was only by ___ them that he managed to get them on.
A. spreading
B. extending
C. lengthening
D. stretching
【单选题】
The trade imbalance is likely to rise again in 2020. ___ a new set of policy actions will be required soon.
A.
B. ecause B. For
C. Hence
D. Therefore
【单选题】
A healthy life is frequently thought to be ___ with the open countryside and homegrown food.
A. associated
B. bound
C. involved
D. tied
【单选题】
My hands and feet were ___ with cold as I waited for the bus.
A. cliff
B. still
C. stiff
D. stick
【单选题】
The Foreign Minister made an excellent ___ on the current international situation.
A. committee
B. command
C. comment
D. commission
【单选题】
Over a third of the population was estimated to have no ___ to the health service.
A. assessment
B. assignment
C. exception
D. access
【单选题】
My father seemed to be in no ___ to look at my school report.
A. mood
B. emotion
C. attitude
D. feeling
【单选题】
He saw the publication of this book as an embarrassing invasion of his ___.
A. secret
B. privacy
C. private
D. piracy
【单选题】
I think I would have died of ___.
A. embarrass
B. embarrassing
C. embarrassed
D. embarrassment
【单选题】
He had an ___ at a restaurant in Greek Street at eight.
A. engagement
B. engage
C. contract
D. promise
【单选题】
These companies often encounter many ___ impediments to investment.
A. invisible
B. edible
C. feasible
D. capable
【单选题】
30 percent of reptiles, birds, and fish are currently ___ with extinction.
A. treated
B. threatened
C. endangered
D. threatening
【单选题】
They have a stronger ___ of the importance of economic incentives.
A. appreciation
B. learning
C. concept
D. idea
【单选题】
I believe I am capable of ___ the political consequences accurately.
A. guessing
B. evaluating
C. calculating
D. computing
【单选题】
When he opened the door, he used too much force and ___ the key.
A. trailed
B. varied
C. wicked
D. twisted
【单选题】
I’m very sorry to have ___ you with so many questions on such an occasion.
A. offended
B. impressive
C. bothered
D. interfered
【单选题】
It is sometimes difficult for young people from the countryside to ___ well to life in the big city.
A. suit
B. adapt
C. regulate
D. coordination
【单选题】
Our guide gave us a detailed ___of this painting but we still do not understand.
A. authority
B. interpretation
C. instruction
D. institution
【单选题】
If you want to ___ the wood, cut it with the grain, not against it.
A. break
B. burn
C. split
D. divide
【单选题】
They have a stronger ___ of the importance of economic incentives.
A. appreciation
B. learning
C. conception
D. idea
【单选题】
I believe I am capable of ___ the political consequences accurately.
A. guessing
B. betting
C. calculating
D. computing
【单选题】
30 percent of reptiles, birds, and fish are currently ___ with extinction.
A. treated
B. threatened
C. danger
D. threatening
【单选题】
Workers should occasionally walk around, ___ and avoid prolonged periods at the desk.
A. pull
B. lengthen
C. strain
D. stretch
【单选题】
These companies often encounter many ___ impediments to investment.
A. invisible
B. edible
C. feasible
D. capable
【单选题】
Running a kitchen ___a great deal of discipline and speed.
A. including
B. involving
C. involves
D. composes
【单选题】
He had an ___ at a restaurant in Greek Street at eight.
A. engagement
B. engage
C. contract
D. promise
【单选题】
I think I would have died of ___.
A. embarrass
B. embarrassing
C. embarrassed
D. embarrassment
【单选题】
He saw the publication of this book as an embarrassing invasion of his ___.
A. secret
B. privacy
C. private
D. piracy
【单选题】
The trade imbalance is likely to rise again in 2020. ___ a new set of policy actions will be required soon.
A.
B. ecause B. Nevertheless
C. Hence
D. Therefore
【单选题】
Stratford police refuse to comment ___ whether anyone has been arrested.
A. about
B. on
C. at
D. with
【单选题】
The world will be different, and we will have to be prepared to ___ to the change.
A. adopt
B. adapt
C. accustom
D. adept
【单选题】
The company has launched a campaign of television ___ and leaflets.
A. commercials
B. commences
C. commerce
D. commercialization
【单选题】
The general secretary may ___ the president at official ceremonies.
A. present
B. represent
C. representative
D. stand
【单选题】
He ___ her arms behind her back and clipped a pair of handcuffs on her wrists.
A. dragged
B. pulled
C. stretched
D. twisted
【单选题】
Suppose that when I come back in ten years’ time all these old houses ___ down.
A. will have been pulled
B. will have pulled
C. will be pulling
D. will be pulled
【单选题】
The picture exhibition bored me to death. I wish I ___ to it.
A. have not gone
B. did not go
C. had not gone
D. should not have gone
【单选题】
An investigation was made into the accident ___ fifty people were killed.
A. for that
B. where
C. when
D. in which
【单选题】
___ with the picture, Mary tore it to pieces.
A. Dissatisfying thoroughly
B. Being thoroughly dissatisfied
C. To dissatisfy thoroughly
D. To be thoroughly dissatisfied
推荐试题
【单选题】
型动车组牵引电机的悬挂方式为体悬式。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
CRH5型动车组牵引电机的悬挂方式为 。
A. 架悬式
B. 抱轴式
C. 体悬式
D. 感应式
【单选题】
型动车组基础制动采用的都是轴盘制动。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5A
【单选题】
CRH5型动车组基础制动采用的是 。
A. 轮盘制动
B. 轮盘+轴盘制动
C. 轴盘制动
D. 踏面制动
【单选题】
型动车组没有轮盘制动。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
踏面清扫装置是 型动车组转向架特有的设置。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
是CRH380A统型动车组转向架特有的设置。
A. 牵引装置
B. 制动装置
C. 踏面清扫装置
D. 驱动机构
【单选题】
型动车组转向架踏面清扫装置的目的是改善轮轨接触面黏着条件,清除车轮踏面附着的油污及污垢,保持稳定的黏着性能。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
CRH380A统型动车组转向架踏面清扫装置的目的是改善轮轨接触面黏着条件,清除车轮踏面附着的油污及污垢, 。
A. 减少轮轨磨损
B. 减少空气阻力
C. 增加牵引功率
D. 保持稳定的黏着性能
【单选题】
型动车组构架横梁作为两个空气弹簧的附加空气室。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
CRH380A统型动车组 作为两个空气弹簧的附加空气室。
A. 上枕梁
B. 构架侧梁
C. 构架横梁
D. 纵向辅助梁
【单选题】
CRH380B型动车组空气弹簧附加空气室是转向架 。
A. 构架侧梁
B. 构架横梁
C. 上枕梁
D. 纵向辅助梁
【单选题】
CRH5型动车组空气弹簧附加空气室是转向架 。
A. 构架侧梁
B. 构架横梁
C. 上枕梁
D. 纵向辅助梁
【单选题】
CRH1A型动车组空气弹簧附加空气室设置在 。
A. 车顶
B. 上枕梁
C. 构架横梁
D. 车底设备舱
【单选题】
型动车组齿轮箱安装在动力轴上通过万向轴和安全装置与电机相连。
A. CRH1A
B. CRH380A统
C. CRH380B
D. CRH5
【单选题】
动车组转向架的动力学性能包括以下几个方面内容: 、走行安全性、舒适性、曲线通过性能。
A. 高速运行稳定性
B. 电机受流运行稳定性
C. 空簧充气稳定性
D. 电机变压稳定性
【单选题】
动车组转向架的动力学性能包括以下几个方面内容:高速运行稳定性、走行安全性、舒适性、 。
A. 直线侧摆性能
B. 曲线通过性能
C. 曲线侧摆性能
D. 直线滑行性能
【单选题】
影响动车组转向架动力学性能的因素: ;垂向振动平稳性。
A. 直线滑行性能
B. 直线运行稳定性
C. 曲线倾斜性能
D. 曲线侧摆性能
【单选题】
影响动车组转向架动力学性能的因素:直线运行稳定性; 。
A. 电机变压稳定性
B. 空簧充气稳定性
C. 垂向振动平稳性
D. 电机受流运行稳定性
【单选题】
拖车转向架由配置在2.8轴端的速度传感器AG37和4.6轴端的速度传感器AG43来获得检测滑行用的速度信号。
A. CRH1A型动车组
B. CRH380A统型动车组
C. CRH380B型动车组
D. CRH5型动车组
【单选题】
CRH380A统型动车组轴箱端盖处共安装 种速度传感器。
【单选题】
CRH380A统型动车组轴箱端盖处共安装4种速度传感器: 、AG43型、GEL247V型、 HS22G1A型。
A. AG37型
B. AG47型
C. AG57型
D. AG67型
【单选题】
CRH380A统型动车组轴箱端盖处共安装4种速度传感器:AG37型、 、GEL247V型、 HS22G1A型。
A. AG33型
B. AG43型
C. AG53型
D. AG63型
【单选题】
CRH380A统型动车组轴箱端盖处共安装4种速度传感器:AG37型、AG43型、 、HS22G1A型。
A. LKJ1000型
B. ATP2000型
C. GEL247V型
D. GElV型
【单选题】
CRH380A统型动车组转向架 装置主要包括轴箱弹簧及防雪罩、垂向减振器:弹性定位节点、轮 对提吊等零部件。
A. 一系悬挂
B. 二系悬挂
C. 接触悬挂
D. 部件悬挂
【单选题】
CRH380A统型动车组转向架一系悬挂装置主要包括轴箱弹簧及 、垂向减振器:弹性定位节点、轮 对提吊等零部件。
A. 气动罩
B. 防雪罩
C. 导电罩
D. 导流罩
【单选题】
CRH380A统型动车组轴箱弹簧安装在 和转向架构架之间。
【单选题】
CRH380A统型动车组轴箱弹簧安装在轴箱和 之间。
A. 车体
B. 转向架构架
C. 上枕梁
D. 电机
【单选题】
CRH380A统型动车组轴箱弹簧安装在轴箱和转向架构架之间。圆簧组传递 方向的力。
【单选题】
CRH380A统型动车组轴箱弹簧包括一个圆簧组(由内、外圈弹簧组成)、弹簧座(上、下)、 橡胶座、 。
A. 导电座
B. 绝缘座
C. 空气座
D. 隔离座
【单选题】
CRH380A统型动车组轴箱弹簧有上,下夹板。上夹板内侧还套上了防止 腐蚀的绝缘罩、上部镶嵌了防尘帽。
【单选题】
CRH1A型动车组转向架轴箱上还装有用于不同功能的轴箱辅助装置,主要包含以下部件:①碳刷装置(保护接地或牵引回流) ; ②速度传感器(WSP, ); ③ATP速度传感器; ④轴温报警装置
A. LKJ1和LKJ2
B. LKJ10和LKJ20
C. LKJ100和LKJ200
D. LKJ1000和LKJ2000
【单选题】
CRH1A型动车组安全吊索(简称吊索)可防止转向架与车体 。
A. 横向分离
B. 纵向分离
C. 垂向分离
D. 斜向分离
【单选题】
CRH1A型动车组每个转向架有 吊索。
【单选题】
CRH1A型动车组吊索装在转向架 和车体枕梁之间。
A. 侧梁
B. 纵向辅助梁
C. 横梁
D. 弯梁
【单选题】
CRH5型动车组制动盘和车轮安装:在进行装配前,应将制动盘、车轮和车轴保持在相同温度情况下至少 h,以保证所要求的过盈量。
【单选题】
CRH5型动车组一系轴箱弹簧分为外侧弹簧和内侧弹簧,两者之间的高度差由调整垫调节,调整垫厚度为 mm。
【单选题】
CRH380B型动车组转向架接地装置为动车组 和钢轨之间提供连续的低电阻连接。
【单选题】
CRH380B型动车组转向架接地装置为动车组车身和钢轨之间提供连续的 连接。
A. 低电阻
B. 高电阻
C. 低电压
D. 高电压
【多选题】
高速转向架按其作用原理一般可分为 。 ___
A. 摆式转向架
B. 高速转向架
C. 低速转向架
D. 非摆式转向架