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【单选题】
双层伸展策略优于逐层伸展策略的关键在于()
A.
zig-zig/zag-zag
B.
zig-zag/zag-zig
C.
zig-zig/zig-zag
D.
以上均是
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参考答案:
举一反三
.1 最常见的道岔是( )
A.
普通单开道岔
B.
对称双开道岔
C.
菱形道岔
D.
交叉渡线
.2 电力机车与其它类型机车相比其主要优点:
A.
综合利用能源资源
B.
不污染空气
C.
运营费用低
D.
运输能力大
.2 以下( )是专用货车
A.
罐车
B.
集装箱平车
C.
矿石车
D.
粮食车
.1 从基本结构来看,车辆一般由车体及( )部分组成。
A.
转向架
B.
车钩缓冲装置
C.
制动装置
D.
车内设备
.1 铁路机车机车按牵引动力来划分有( )类型
A.
蒸汽机车
B.
内燃机车
C.
电力机车
D.
调车机车
.1 以下( )属于通用货车
A.
棚车
B.
罐车
C.
落下孔车
D.
平车
列车尾部安全防护装置主要由列车机车部分、列车尾部部分和( )三部分组成。
A.
主机电池
B.
无线确认仪
C.
列车尾部安全防护装置数据处理系统
D.
黑匣子
.10.2 各型动车组的技术序列代码1表示( )
A.
BST研制生产的动车组
B.
四方研制生产的动车组
C.
唐客研制生产的动车组
D.
长客研制生产的动车组
.1 调车作业由( )单一指挥。
A.
调车长
B.
连结员
C.
制动员
D.
信号员
.2 双线区间正方向越出站界调车,区间为自动闭塞时,从监督器上确认( )空闲。
A.
第一闭塞分区空闲
B.
第二闭塞分区空闲
C.
第三闭塞分区空闲
D.
闭塞区间
.2 下列情况不属于违反列车编组计划的是( )
A.
将直通列车的车流编入区段列车
B.
将中间站车流编入摘挂列车
C.
违反车流径路,将车辆编入异方向列车
D.
未按规定选分车组
.1 下列不属于列车中车辆的编挂方法的是( )
A.
单组混编
B.
分组选编
C.
到站成组
D.
按站顺编组
.2 车号员检查核对现车,要保证( )“三相符”。
A.
现车、车号、货运单据
B.
现车、车号、列车编组顺序表
C.
车号、货运单据、列车编组顺序表
D.
现车、货运单据、列车编组顺序表
.2 下列作业不属于到发技术作业的是( )。
A.
技术检查
B.
摘机车
C.
开放或关闭信号
D.
票据交接
.2 客运站工作组织包括( )工作。
A.
售票
B.
行包运送
C.
行车组织
D.
客运服务
.1 车辆的货运检查及整理由车站的( )负责。
A.
货运检查员
B.
货运员
C.
货运值班员
D.
车号员
.2 货物的途中作业内容包括( )。
A.
货运交接检查
B.
特殊作业
C.
异常情况
D.
装卸车作业
.1 军事运输范围主要是( )。
A.
执行作战、战备、训练、演习、调防、国防科研、抢险救灾、国防施工和生产等任务的部(分)队
B.
队院校毕业分配、实习的学员
C.
参加军事行动的民兵、民工
D.
作战、战备、训练、演习、调防、抢险救灾的装备物资
相关题目:
【单选题】“Nevertheless” is a useful word, which means _______.
A.
never
B.
hardly ever
C.
despite what has just been said or referred to
D.
seldom
【单选题】下面的说法正确的是
A.
abstract可以修饰字段、方法和类
B.
抽象方法的body部分必须用大括号包住,但是需要为空
C.
声明抽象方法,大括号可有可以没有
D.
抽象方法没有方法体
【单选题】若所有print方法均为static,则其结果输出为
A.
Manager Employee
B.
Person Person
C.
Manager Person
D.
Person Manager
【单选题】A, B独立
A.
0.5
B.
0.6667
C.
0.8333
D.
0.9
【单选题】$\lim_{x\to \frac{\pi }{3}} \, \frac{\sin (x)}{\cos (x)+1}$
A.
$\frac{1}{\sqrt{3}}$
B.
$-\frac{1}{\sqrt{3}}$
C.
$\frac{1}{2}$
D.
$-\frac{1}{2}$
【单选题】Why does the memory becomes smaller and smaller?内存“越来越小”的原因是:
A.
With more and more processes running on one computer, the average memroy size for each process is getting smaller 机器上运行的程序越来越多,平均每个程序使用的内存变小
B.
The real-world applications call for rocketing memory storage 实际应用对存储的需求急剧增长
C.
The silicon used for producing chips is soon running out 用于制造内存芯片的硅资源消耗殆尽
D.
The physical size of memory chips is getting smaller thanks to the advances in technology 随着工艺的进步,内存的体积变小,集成度变高
【单选题】How to engage in other people’s discussion in a seminar when you are not fully prepared?
A.
Follow the lecture closely and look for opportunities to ask relevant questions.
B.
Pretend you’re fully prepared and listen carefully
C.
Ask people around for help
D.
Record all the lecture and learn it later by yourself
【单选题】The baby carrying the DNA of three parents is an experimental specimen, aiming at ______.
A.
having more babies
B.
having babies with genetic modification
C.
eliminating genetic diseases in newborns
D.
innovating in the field of life science
【单选题】B-trees are 树结构上的特点是:
A.
short and chubby, with each node having at most two children矮胖,每个节点至多两个孩子
B.
short and chubby, with each node having potentially many children矮胖,每个节点可有多于两个孩子
C.
tall and slim, with each node having at most two children瘦高,每个节点至多两个孩子
D.
tall and slim, with each node having potentially many children瘦高,每个节点可有多于两个孩子
【单选题】B-trees have small height so as to B树的层数少有助于:
A.
reduce the number of I/O operations 减少I/O次数
B.
reduce the time consumption for a single I/O 减少每次I/O的时间
C.
reduce the asymptotic time complexity for seaching 降低查找的渐进时间复杂度
D.
reduce the storage requirement 节省存储空间
【单选题】In the Academic Writing part, Alex discussed with Ruoqi on academic skills, such as ______.
A.
plagiarism, paraphrasing and summarizing
B.
plagiarism, paraphrasing and synthesizing
C.
how to avoid plagiarism, paraphrase and summarize
D.
how to avoid plagiarism, paraphrase and synthesize
【多选题】运动休闲可以( )。
A.
减轻医疗负担
B.
增强抵抗力
C.
减少疾病
D.
促进心理健康
E.
缓解精神压力
【单选题】Through the group discussion between ______ , we figured out the differences between adolescence and adulthood.
A.
Abbas, Zuowan and Jialin
B.
Billy, Xuanhui and Jialin
C.
Abbas, Xuanhui and Jialin
D.
Billy, Xuanhui and Zixiao
【单选题】下面说法正确的是
A.
FileWriter类是Writer类的子类
B.
FileWriter类是OutputStreamWriter类的子类
C.
FileWriter类是FileOutputStream类的子类
D.
Wirter类是OutputStreamWriter类的子类
【单选题】What's the return value for a failed search in a B-tree of order 4?B树查找算法若最终失败,返回值为:
A.
None
B.
NULL
C.
A pointer to the last examined node 指向最后一个所查找节点的指针
D.
A pointer to the root 指向根节点的指针
【单选题】Which of the following is NOT the reason why she does not like to take photos with the camera?
A.
It was easy to break
B.
It was too heavy
C.
it is easy to get stolen
D.
it is too expensive
【单选题】What “eat earth” means?
A.
Having to spend less after spending a lot during the shopping festival.
B.
Living a luxurious life after earning a lot of money.
C.
Having failed to live a modest life.
D.
Living a luxurious life.
【单选题】Popular novels can be adapted and made into ____; ____ and _____.
A.
films; television programs; video games
B.
cartoons; dramas; games
C.
websites; televisions; audio programs
D.
films; cartoons; games
【单选题】下面说法中错误的是
A.
FileReader类是Reader类的间接子类
B.
InputStreamReader类是Reader类的子类
C.
BufferedReader类可以读取一行
D.
BufferedReader的readLine()函数,如果没有数据时会返回0
【单选题】What's the 'overflow' for a B-tree?B树的上溢是指:
A.
The property of a B-tree is violated due to removing a key 删除关键码后违反了B树的性质
B.
The property of a B-tree is violated due to inserting a key 插入新的关键码后违反了B树的性质
C.
The property of a B-tree is violated due to a split 分裂后违反了B树的性质
D.
A B-tree becomes too high B树的高度过高
【单选题】设随机变量服从区间(0,2)上的均匀分布,则$Y=X^{2}$在(0,4)上的密度函数为()
A.
$\frac{1}{3\sqrt{y}}$
B.
$\frac{1}{\sqrt{y}}$
C.
$\frac{1}{2\sqrt{y}}$
D.
$\frac{1}{4\sqrt{y}}$
【单选题】Which consequence follows as a B-tree becomes higher?B树高度的增加一定伴随着:
A.
Each node has a larger number of keys 每个节点所存放的关键码数量增加
B.
Each node has a smaller number of keys 每个节点所存放的关键码数量减少
C.
Splitting to the root 分裂到根
D.
Splitting to the leaves 分裂到叶
【多选题】Gardening is ______.
A.
a great daily exercise
B.
a great way to keep your lawn beautiful
C.
a great way to keep you healthy
D.
landscape painting
【单选题】Choose the most appropriate answer by completing the sentences below or answering the questions.1. Why is Billy a bit disappointed about the film?
A.
The quality of the film is comparable with the novel itself.
B.
The movie is unbelievable, for the plot is not true to the novel.
C.
The stories producers and directors tell are unbelievable.
D.
While adapting the original novels into films, producer exaggerated too much.
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