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【简答题】
$\lim_{x\rightarrow \infty} \frac{[x+1]}{x}$__
参考答案：
参考解析：
刷刷题刷刷变学霸
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x-arccotx+c
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x-arccosx+c
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x-arcsinx+c
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x-arctanx+c
【多选题】Gardening is ______.
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a great daily exercise
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a great way to keep your lawn beautiful
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a great way to keep you healthy
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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?
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The quality of the film is comparable with the novel itself.
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The movie is unbelievable, for the plot is not true to the novel.
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The stories producers and directors tell are unbelievable.
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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
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【单选题】The underflow of a B-tree happens whenB树的下溢发生于：
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the height of the tree decreases B树高度减少
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the property of the B-tree is violated due to inserting a key 插入关键码后违反了B树的性质
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the property of the B-tree is violated due to deleting a key 删除关键码后违反了B树的性质
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正确
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错误
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正确
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there are multiple keys in the root 根节点有多个关键码
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consideration
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depression
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imagination
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inspiration
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50
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礼
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乐
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射
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御
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书
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数
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固定翼反潜机
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反潜直升机
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人生观是对人生目的、意义的根本看法
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世界观是人生观重要组成部分
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哲学只是关于世界观的学问
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be more likely to do something
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be happy to do something
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be taught to do something
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1/x+C
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lnx-1+C
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xlnx+C
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red 红
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black 黑
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yellow 黄
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blue 蓝
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green 绿
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网络购物
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支付宝
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高铁
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抖音
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拼多多
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共享单车
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正确
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错误
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evident
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clear
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not obvious
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apparent
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The reason for doing something.
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Something happens in that way or has the result the consequence of something.
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The potential risk of doing something.
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The original plan of doing something.
【单选题】What's unique about red-black trees compared to AVL trees? 红黑树相比于AVL树的特点是：
A.
The balance factor of each node falls within [-1, 1] 每个节点的平衡因子的绝对值不超过1
B.
It is a balanced binary search tree 是平衡二叉搜索树
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The search time is O(lgn) 支持O(lgn)时间的查找
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He quarreled with his classmates.
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He was stressed about the college entrance examination.
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He missed several classes due to illness
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He was often stressed when he faced an academic problem.
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好的选题非一日之功
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$(1,2)$
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$[1,2)$
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$(1,2]$
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$[1,2]$
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2.1
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4.2
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$(-\infty ,0]$
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$M_1 < M_2, N_1 > N_2 $
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$M_1 = M_2, N_1 > N_2 $
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$M_1 < M_2, N_1 = N_2 $
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fascinating
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dominating
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red 红
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black 黑
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O(1)
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O(lgn)
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O(n)
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O(nlgn)
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$0.0304$
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$0.0902$
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$0.0718$
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$0.0625$
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A.
$M_1 \geq M_2, N_1 \leq N_2 $
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$M_1 > M_2, N_1 < N_2 $
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$M_1 < M_2, N_1 > N_2 $
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$M_1 = M_2, N_1 = N_2 $
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O(1)
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O(lgn)
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O(n)
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O(nlgn)
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likely
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unlikely
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predictable
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unpredictable
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$\frac{{a + b + |a - b|}}{2},\frac{{a + b - |a - b|}}{2} $
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$\frac{{a - b + |a - b|}}{2},\frac{{a + b - |a - b|}}{2} $
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$\frac{{a + b - |a - b|}}{2},\frac{{a - b + |a - b|}}{2}$
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$\frac{{a + b + |a - b|}}{2},\frac{{a - b + |a - b|}}{2} $
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A.
the root is red 根节点为红色
B.
both the root and the external nodes are red 根节点和外部节点都为红色
C.
both a parent and its child are red 相邻的两个父子节点都为红色
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there are two red nodes in the tree 树中有两个红色节点
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A.
0.5543
B.
0.6362
C.
0.1905
D.
0.2364
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A.
irrelevant
B.
irritable
C.
inexhaustible
D.
irresistible
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A.
8
B.
9
C.
10
D.
11
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A.
finitely
B.
infinitely
C.
eternally
D.
long-lastingly
【单选题】What does “insomnia” mean?
A.
Lack of vitality.
B.
Lack of sleep.
C.
Loss of interest in food.
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A.
增大
B.
减小
C.
基本不变
【单选题】、用泊松分布作近似计算
A.
$1-1.8e^{-0.8}$
B.
$1-0.8e^{-0.8}$
C.
$1-e^{-0.8}$
D.
$1-2.12e^{-0.8}$
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A.
25/216
B.
1/6
C.
5/36
D.
25/36
【单选题】接4题，输入电阻Ri将_____，
A.
增大
B.
减小
C.
基本不变
【单选题】函数$y = \sqrt {x - \sqrt x } + \sqrt {{2^x} - 4} $的定义域为 ( ).
A.
$[0,1] $
B.
$[1,2] $
C.
$[2,+\infty) $
D.
$[1,+\infty) $
【单选题】How does the topology changes when fixing a double red and the uncle node u is red.当叔父节点u为红色时，修正双红缺陷导致的红黑树拓扑结构的变化为：
A.
no change 没有变化
B.
it changes no more than O(1) 有变化，但是不超过O(1)
C.
it changes no more than O(lgn) 有变化，但是不超过O(lgn)
D.
it changes no more than O(n) 有变化，但是不超过O(n)
【单选题】函数$y = \frac{1}{{[x + 1]}} $(其中 $[x+1] $是取整函数)的定义域为 ( ).
A.
$(-\infty,-1) $
B.
$[0,+\infty) $
C.
$( - \infty , - 1) \cup [0, + \infty ) $
D.
$( - \infty , - 1] \cup (0, + \infty ) $
【单选题】Clearly, the hypothesis does need some _______, in the light of these surprising results.
A.
refinement
B.
refreshment
C.
retirement
D.
recruitment
【单选题】谁能帮我读文献？
A.
Pubmed
B.
F1000
C.
Scifinder
【单选题】接4题，输出电阻Ro将_____；
A.
增大
B.
减小
C.
基本不变
【单选题】In her writing, she _______ for a balance between innovation and familiar prose forms.
A.
striven
B.
strove
C.
stove
D.
stolen
【单选题】函数$y = |x| + |x - 1| - |4 - 2x| $的最小值和最大值分别是 ( ).
A.
$-4,\quad 3 $
B.
$-3, \quad 3 $
C.
$-3, \quad 4 $
D.
$-4, \quad 4 $
【单选题】设随机变量t服从参数为2的指数分布，求方程$x^{2}+tx+4=0$有实根的概率。
A.
$1-e^{-8}$
B.
$1-e^{-4}$
C.
$e^{-8}$
D.
$e^{-4}$
【单选题】There are many joint _______ between American and Japanese companies.
A.
ventures
B.
risks
C.
chances
D.
hazards
【单选题】接4题，当Rc减小时，静态电流IBQ将_____，
A.
增大
B.
减小
C.
基本不变
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