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【单选题】
The node accessed is a right-child, and so is its parent. What should we do for a single splay operation?所访问的节点及其父亲都是右孩子，则双层伸展要执行的操作是：A.
zig-zag
B.
zag-zig
C.
zig-zig
D.
zag-zag
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
锅炉负荷增加时,辅射过热器和对流过热器的吸热量变化将出现( )的情况。
A.
辐射过热器吸热量相对增大，对流过热器吸热量相对减少；
B.
辐射过热器吸热量相对减少，对流过热器吸热量相对增大；
C.
两种过热器的吸热量都相对增大；
D.
两种过热器的吸热量都相对减小。
锅炉水压试验范围：锅炉的受热面系统，本体范围内的管道及附件都应参加水压试验。_______不参加超水压试验,采取防止起座措施。
A.
水位计
B.
安全门
C.
过热器
D.
再热器
将运行中的唯一一台_______停运，其余风机不受影响；MFT保护动作触发减温水电动门联锁关闭，石灰石、沥青质输送一级给料机跳闸，掺烧气快切阀关闭。
A.
一次风机
B.
高压流化风机
C.
上二次风机
D.
下二次风机
锅炉蒸汽吹灰顺序为_______。
A.
空预器-低过、中再区域-低再区域-高温省煤器区域-低温省煤器区域-脱硝区域-空预器；
B.
空预器-低再区域-高温省煤器区域-低过、中再区域-低再区域-低温省煤器区域-脱硝区域-空预器；
C.
空预器-高温省煤器区域-低温省煤器区域-脱硝区域-低过、中再区域-低再区域-空预器；
D.
空预器-低过、中再区域-低再区域-低温省煤器区域-高温省煤器区域-脱硝区域-空预器；
炉膛负压和烟道负压剧烈变化，排烟温度不正常升高，烟气中含氧量下降，热风温度，省煤器出口温等介质温度不正常升高，此现象表明发生（ ）。
A.
烟道再燃烧
B.
送风机挡板摆动
C.
锅炉灭火
D.
吸风机挡板摆动
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abstract可以修饰字段、方法和类
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tall and slim, with each node having potentially many children瘦高，每个节点可有多于两个孩子
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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
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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】随机变量的分布函数是右连续函数。
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错误
B.
正确
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plagiarism, paraphrasing and summarizing
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plagiarism, paraphrasing and synthesizing
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how to avoid plagiarism, paraphrase and summarize
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how to avoid plagiarism, paraphrase and synthesize
【单选题】$\lim_{n\to \infty } \, e^{-n}$
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【单选题】If it would take us a second for a single memory access, how long would it cost for a single access to the external storage?如果说访问一次内存需要1秒，则一次外存访问大概需要：
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a month 1月
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a year 1年
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$\frac{1}{3}$
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$1$
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0
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$+\infty$
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减轻医疗负担
B.
增强抵抗力
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减少疾病
D.
促进心理健康
E.
缓解精神压力
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Abbas, Zuowan and Jialin
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Billy, Xuanhui and Jialin
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Abbas, Xuanhui and Jialin
D.
Billy, Xuanhui and Zixiao
【单选题】In the main part of Text A, ______ showed us some opinions on the relationship between musical experiences and intelligence.
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Kamlesh
B.
Jason
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John
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Abbas
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O(1)
B.
O(lgn)
C.
O(n)
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O(nlgn)
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A.
正确
B.
错误
【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】How many children are there for each node in a B-tree of order 4?4阶B树中每个节点的分支数为：
A.
1~4
B.
2~5
C.
2~4
D.
3~5
【单选题】During the conversation between Billy, Yuege and Yunpeng, we took a brief look at ______ .
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brain development
B.
brain degradation
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human evolution
D.
human degeneration
【判断题】舰载机飞行活动组织流程分三个区域：飞行甲板部分、机库部分、空中部分。
A.
正确
B.
错误
【单选题】口袋中有5个球，编号为1,2,3,4,5。从中任取3个，以X表示取出的3个球的最大号码。则P(X=4)=()
A.
1/10
B.
3/10
C.
5/10
D.
7/10
【判断题】时尚总是从较低阶层向较高阶层传递。
A.
正确
B.
错误
【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】What's the height of a B-tree of order 128 relative to a corresponding BBST?若B树的阶m=128，则它的高度大致是对应的BBST的：
A.
1/5
B.
1/6
C.
1/7
D.
1/8
【单选题】口袋中有7个白球、3个黑球，每次从中任取一个不放回，则首次取出白球的取球次数为3的概率为（）
A.
7/120
B.
7/10
C.
7/30
D.
1/120
【判断题】校园体育运动是中国体育发展的沃土。
A.
正确
B.
错误
【单选题】设随机变量\( X \)服从区间（0,2）上的均匀分布，则\(P(X^2>2) \)=（）
A.
$\sqrt2/2$
B.
$\sqrt2$
C.
$1-\sqrt2/2$
D.
$1-\sqrt2$
【单选题】当$k$为何值时$\lim_{x\to 4} \, \frac{k+x^2-x}{x-4}$极限存在
A.
$4$
B.
$0$
C.
$-4$
D.
$-12$
【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】设圆的直径服从区间（0,1）上的均匀分布，则圆的面积在（0,\(\pi\)）上的密度函数为（）
A.
1/2
B.
1
C.
3/2
D.
2
【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
【单选题】令$f(x)=\frac{x^{2}}{1+x^{2}}$,则它的不定积分为（）
A.
x-arccotx+c
B.
x-arccosx+c
C.
x-arcsinx+c
D.
x-arctanx+c
【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.
【单选题】根据本题题干回答以下（1）（2）题设连续型随机变量X的概率密度函数为(1)、则常数k的值为
A.
1/2
B.
1/4
C.
1/6
D.
1/8
【单选题】The differences between the original novel and their adapted film depend on _______, _______ and _______.
A.
writers; actors; audience
B.
writers; actors; producers
C.
directors; actors; audience
D.
directors; producers; audience
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