刷刷题-logo
logo - 刷刷题
大学职业技能学习工具
下载APP
【单选题】
如果$\lim_{x\rightarrow a^+} f(x)=\lim_{x\rightarrow a^-} f(x)=L$,那么$f(a)=L$.
A.
正确
B.
错误
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三
增压泵进口的水一般来自于{D}。
A.
内循环水进水
B.
内循环水回水
C.
外循环水进水
D.
外循环水回水
车辆伤害事故发生的原因不包括( )。
A.
刹车失灵等
B.
驾驶员无证驾驶
C.
.路人吸烟
D.
违章载人、管理人员违章指挥
事故预警级别分为四级,即一级、二级、三级和四级,分别是下列何种颜色标示( )。
A.
红、橙、黄、蓝
B.
红、黄、橙、绿
C.
红、黄、绿、蓝
D.
黄、红、橙、蓝
发现人员触电时,应采取()之脱离电源。
A.
立即用手拉开触电人员
B.
用绝缘物体拨开电源或触电者
C.
用铁棍拨开电源线
D.
大声呼救
预防高处坠落的控制措施不包括( )。
A.
挂安全带
B.
设置防护栏
C.
佩戴安全帽
D.
设置监护人
下列做法不是有毒有害气体中毒窒息事故防范措施的是( )。
A.
设置连锁报警装置
B.
拉设警戒线
C.
强制通风
D.
配备呼吸防护用品
下列液压阀,哪些是压力控制阀( )。
A.
单向阀
B.
换向阀
C.
溢流阀
D.
节流阀
以下属于液压系统辅助元件的是( )。
A.
液压缸
B.
液压泵
C.
液压阀
D.
压力表
EP2的主要作用是( )。
A.
密封作用
B.
润滑作用
C.
冷却作用
D.
清洗作用
液压油主要包括( )
A.
矿物油型
B.
水化型
C.
合成型
D.
乳化型
常用的液压泵有( BCD ) 三大类。
A.
截止泵
B.
叶片泵
C.
柱塞泵
D.
齿轮泵
方向控制阀包括( )两类
A.
溢流阀
B.
换向阀
C.
截止阀
D.
单向阀
分拣机器人发生故障时如何进入其工作区域?()
A.
打开安全门直接进入
B.
拍急停打开安全门进入
C.
暴力开门进入
D.
翻越安全护栏进入
上料机器人发生故障时如何进入其工作区域?()
A.
拍急停打开安全门进入
B.
由上料口进入
C.
翻越安全护栏进入
D.
打开安全门直接进入
叠板机器人取板掉板报警如何处理?()
A.
直接复位报警
B.
打开安全门扶正板件再复位启动
C.
拿走板件复位启动
分拣机器人夹具夹爪硅胶垫破损如何处理?()
A.
继续使用
B.
胶带固定
C.
更换新的
D.
去除不用
当机器人海绵吸盘破损如何处理?()
A.
继续使用
B.
胶带固定
C.
去除不用
D.
更换新的
安全门预约停止选钮旋至停止档,分拣机器人如何动作?()
A.
无动作
B.
机器人立马停止
C.
机器人执行完程序再停止
相关题目:
【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.
打开"刷刷题APP",使用更方便
打开APP