启明考试系统怎么搜题-2024欧洲杯竞猜官方平台
教师资格习题 9048
( )是依法治国的实践基础。
共产第一次专题研究依法治国问题的全会是( )。
第十二届全国人大常委会第二次会议通过的《旅游法》,于( )生效。
我国的《旅游法》采取( )立法模式。
景区内的核心游览项目因故暂停向旅游者开放或者停止服务的,应当( )。
对于利用公共资源建设的景区门票以及景区内的游览场所、交通工具等另行收费项目,实行( )。
公益性的城市公园、博物馆、纪念馆等,除了重点文物保护单位和珍贵文物收藏单位外,应当( )。
景区、住宿经营者将其部分经营项目或者场地交给由他人从事住宿、餐饮购物、游览、娱乐、旅游交通等经营的,应当对实际经营者的经营行为给旅游者造成的损害承担连带责任。
在旅游者数量可能达到最大承载量时,景区只要自己做好客流管控即可,无须公告和向当地报告。
我国《旅游法》赋予旅游者自主选择权,据此,旅游者有权拒绝旅游经营者的( )。
我国《旅游法》规定,旅游者在人身、财产安全遇到危险时,有请求( )的权利。
旅游者购买、接受旅游产品和服务时,应当向旅游经营者如实告知与旅游活动相关的个人信息,遵守旅游活动中的安全警示规定。
旅游者从事严重影响其他旅游者权益的活动,且不听劝阻、不能制止的,旅行社也不能解除合同。
旅游者虽享有法定的权利,但在实践中,常常有旅游者权益受到侵害的情况?你有这样的经历么?你又是如何进行的呢?
结构力学的主要内容是( )
作为结构的体系应是:
图示体系虽有3个多余约束,但为保证其几何不变,哪两根链杆是不能同时去掉的。
图示体系为:
图示体系为:
有多余约束的体系一定是几何不变体系。
几何不变体系一定是静定结构。
静定结构在荷载作用下,其全部反力和内力:
静定结构在支座移动、变温及荷载分别作用下,均产生位移和内力。
多跨静定梁仅当基本部分承受荷载时,其它部分的内力和反力均为零。
图示为一杆段的m、q图,若q图是正确的,则m图一定是错误的。
图示梁上的荷载p将使cd杆产生内力。
图示桁架内力为零的杆有 ( )
图示三铰拱左支座的竖向反力为零。
图示结构ab杆的内力为零。
图示结构中:
简支梁跨中截面弯矩的影响线与跨中有集中力p时的m图相同。
用静力法作影响线,影响线方程中的变量x代表截面位置的横坐标。
机动法作静定结构内力影响线的理论基础是:
应用虚力原理求体系的位移时,虚设力状态可在需求位移处添加相应的非单位力,亦可求得该位移。
用图乘法求刚架和梁结构位移,常不考虑轴力和剪力对变形的影响。
图示结构中,d,e两点的相对线位移与各链杆的轴向变形无关。
结构发生图示支座移动,b结点产生水平位移0.0525px。
刚体系与变形体系虚位移原理的虚功方程两者的区别在于:
欲直接计算桁架杆bc的转角,则虚设力系应为:
图b示图a结构的力法基本体系,则力法方程中的系数和自由项为:
在温度变化或支座移动因素作用下,静定与超静定结构都有变形。
超静定结构中杆端弯矩只取决于杆端位移。
位移法典型方程的右端项一定为零。
位移法的理论基础是:
图示结构用位移法求解可得:
位移法的适用范围:
what class of ticket would you like,______ class or business class? 那你需要定什么舱位的机票(经济舱还是商务舱)?
以下中英文翻译正确的是
i am afraid that your baggage is ______.
the sign above means__________?
which item belongs to the contraband on the plane for the carry-on baggage?
what information should we offer when we reserve an air ticket?
the sign above means ____________.
the passengers are not allowed to carry metallic things.
we should not make any jokes regarding aircraft hijacking or bombing at the airport.
what is the _____ of the ticket? (请问机票折扣是多少?)
could you give some examples of "don't" list at security check? you can write the answer on a piece of paper, then take a photo and uplode it. or you could directly answer it online.
请问可以换素食吗?以下翻译中最佳的句子是:
图片中的物品是____________.
以下单词能够将对话填补完整恰当的是: ——you have in-flight entertainment equipment of micro-tv and music system. you can adjust the volume and select a _________ as you like. ——yes, it's convenient.
选择正确恰当的词语将以下句子补充完整。 please put your carry-on luggage ___________ the seat in front of you if there is no room in the overhead bin.
以下翻译正确的是: please fasten your _______(安全带)?
如果你在飞机上晕机了,需要空服人员的帮助,以下表述恰当的是:
if you are flying internationally, you will need to show your passport again when boarding.
cbp is short for u.s. customs and border protection.
根据中文,在下面的横线上填上正确的单词或者句子,将意思补充完整。 ladies and gentelmen! _______________,please! 女士们,先生们,请注意!
--what would like to drink? --___________(红茶).thanks. 填入正确的词语,将对话补充完整。
please put your _____ in upright position.
if your uncle is a chinese and he goes to paris for travelling, then for french people, his behavior is _____.
how long will it take_____ the museum ______ the train station?
turn right ____ the first crossing.
please fasten your _______.
which of the following currency is not available now?
what are the possible reasons of baggage lost?
if you are flying internationally, you will need to show your passport again when boarding.
you can place your aller bag under your seat when you are on the plane.
what would you like for your inflight meal? ____________________.(意大利面)
i was just _____ by the airlines that my flight has been rescheduled.
i am planning to _______ my talk with him till tuesday.
i'm afraid that i have to __________ my appointment.
something _______ has come up. he has to attend a very urgent meeting.
what preparation work should we do before we go to the airport to meet the guest(s)?
you should introduce the old to the young when you are introducing someone.
you should call the person you are scheduled earlier whenever possible.
it is not necessary to make your first appointment as early as possible.
making the call to rearrange the appointment is a good way.
lies or bogus excuses are worst reasons for rescheng.
if you want to experience local customs and more practices, the best choice for lodging is _______.
in america, "december 20th,2018" should be written as ______.
----good morning, welcome to hilton hotel. what can i do for you? ----good morning, i'd like to check in now. ----ok, do you have a ____________?
---hello, what is the ________ between chinese rmb and us dollars? ---it's about 6.4 yuan for 1 us dollar.
what items should be covered while booking a room?
do you have a _______twin room ?
there are several ways of booking a hotel, such as online booking, telephone booking, etc..
providing the registration number can save our time for pulling up the information.
when the receptionist upgrades the room for us, we don't need to pay the extra charge all the time.
in the american hotel, if there are something wrong in the room, the guest should call the maintenance department first.
make an english introduction about chateau hotel savigny in france. the relevant hotel information has been attached below.
1.which does not belong to the eight cuisine in china?_____
please record the following dishes as a standard western dinner. 1. main course 2. soup 3. coffee 4. starter
which is not the traditional chinese food?____
which one should we order first at the western restaurant?
which of the following statements are not correct?
in china, it is polite to open gifts before the guests.
if you are the guest attending the dinner party, you’d better not do anything until the host does it first.
we should persuade the foreign guests to eat more in order to show our hospitality even if they are very full.
making speeches is necessary especially in a large welcome party.
根据中文意思完成以下英语表述。 you can reserve the table on the ____.(您可以在网上预定餐位。)
请根据中文意思完成以下英语表述。 would you like a table in the hall or in the ____room?(您想在大厅还是包厢用餐?)
what are essential in a company visit?
as about the branch names of a company, which expression is not correct?
what items should be included in the presentation?
i am going to ____ this subject from the following perspective.
what should we do for a company presentation?
my name is lucy smith. and i’m____ sales department of rainbow company.
what background information could we prepare for presentation?
asking and answering questions are indispensable parts for a company's presentation.
what would you say if you want to express your purposes belowing in a presentation. a. you greet your audience.
what would you say if you want to express your purposes belowing in a presentation. b. you introduce your talk.
we have already_____ a leading market position.
what kind of staff do we need at exhibition?
the __________of the internet has ushered in an era of sales promotion by electronic means.
what is not the way for promotion before the show ?
which of the following factors should be taken into consideration when choosing the location of exhibition center?
which of the following factors may influence the development of the exhibition industry ?
nothing should be crossed when you serve the customer at an exhibition
we should not keep direct eye contact with the customer at an exhibition
asking _____questions is a good choice for reception at the booth.
before closing the conversation with your visitors at the booth, do not forget to _______________
some employees are___________ to take time out to attend a meeting because they feel it will be a waste of time.
both the___________ and the participants must actively work to keep meetings focused on the agenda.
7what are not the major responsibilities of conference host?
what information should be covered in business meeting minutes?
what facilities are used for conference?
what should we clarify clearly in the process of conference preparation?
what should be contained in meeting packet?
some information should not be given when we contact the guests to a conference.
conference is a formal meeting held so that opinions and ideas on a subject, or a number of subjects, can be exchanged.
which one is the correct procedure of price negotiation?
since we _____ the goods, we hope you will supply the goods for prompt shipment.
what is the mode of payment you wish to ____?
this contract will _________ as soon as it is signed by two parties.
what will be discussed in a business negotiation?
shipment is to be ______ during october.
the contract is _____ for two years.
the buyer and the seller in a negotiation are called the parties.
an offer is something given during the negotiation.
the aim of price negotiation is only to make the greatest profits.
the flavor of guangdong cuisine is
which of the following choices are not included in the eight great cuisine in china ?
what class of ticket would you like, ___class or business class ?
how much do you ____ for a double room per night ?
50 dollars per night , plus 15%_____.
we have already____ a leading market position.
what is the correct order of the following dishes as a standard western dinner. main course dessert side order appetizer soup
if there is no further developments, i would like to _______to today's agenda.
which of the following choices has the same meaning as the word "bedrock price"
let's ______the transaction at the price of 20 yuan each.
which of the following does not belong to the ways of opening the business conference ?
which one is not the appropriate wearing for the business banquet ?
_____ is really necessary before business negotiation
we would like to ______some us dollars into austrialin dollars
if we travel abroad, which one is the first counter we have to go through after landing ?
which of the following choices does not belong to the procedure of booking the flight online ?
what is the baggage _______ for business class ?
which of the following choices is not neccessary when we check-into the hotel abroad ?
what are the ways of promoting exhibition ?
what are the good ways of promoting before the trade show ?
my name is james johnson, and i am in charge of sales department.
what background information could we prepare for the company presentation ?
"如果您现在预订,可以享受八折优惠。” 以下英语表达正确的是?
we have to _____before going through the security inspection.
i'd like to reserve a family______.
what cannot be allowed to take for security inspection ?
what should we prepare for the business conference ?
is there any double room available on nov. 20th ? the possible polite answers could be ________.
---madam, how would you like your money ? ---___________________.
what should we prepare for a product presentation ?
which statement about pricing strategy is true ?
how many types of booth do we usually have ?
shipment is to be _________during october.
i'd like to ___some us dollars _____yen.
sorry, there is no ___to seoul at that time. you have to transfer in hong kong.
translation: 请问能给我一张海关申报单么?
which of the following choices could be covered when describing a company ?
we don't need to ask for the client's business card after the booth reception and promotion.
we should inform the attendees of the business conference at least two or three days before.
things those are not eaten like bones should be put on the table when you are having dinner on some formal occasions.
in the west, it is a practice to send a gift to guests, but the gift is neither too big nor too expensive.
you should make a business appointment face to face.
if you are invited to a dinner party, you'd better not do anything until the host does it first.
we don't need to give tips to the bellboy at the hotel in the united states.
the goal of business negotiation is to make profit for your own company
various conventions and exhibitions could help the __________growth of our national economy. (丰富的会议会展活动对于经济的稳步发展起到了促进作用。)
i'd like to take this opportunity to _____our warm welcome to the distinguished guests.(我愿借此机会向各位贵宾表示热烈的欢迎。)
i‘d like to show my sincere thanks to our host for their gracious _____.(我谨向东道主的盛情款待致以最诚挚的谢意。)
if you want to get the order, i am afraid you will have to ______the price. (如果贵方想达成交易,恐怕需要降价。
would you show me the ______________area for ca 1002 ?(请问ca1002航班的行李提取区在哪儿?)
would you mind helping me place my carry-on luggage in the __________.(可以麻烦你帮我把行李放到上方储物柜么?)
i am going to ____ this subject from the following perspective.
what class of ticket would you like,______ class or business class? 那你需要定什么舱位的机票(经济舱还是商务舱)?
the sign above means__________.
how much do you _____ per night?
turn right ____ the first crossing.
we have already_____ a leading market position.
____ the road you can see the hospital.
please reorder the following dishes as a standard western dinner. main course soup coffee starter
if there is no further developments, i’d like to____________ to today’s topic.
various conventions and exhibitions could help the ________ growth of our national economy.(多种多样的会议会展活动对于经济的稳步发展能够起到促进作用。
my name is lucy smith. and i’m____ sales department of rainbow company.
what background information could we prepare for company presentation?
“如果您现在预订,可以享受八折优惠。”以下英语表达正确的是?
what should we take account of for the business convention?
how many types of booth do you know?
shipment is to be ______ during october.
which one has the same meaning as the word "bedrock price"?
what do you think are the ways of promoting exhibitions?
what should we do before clearing the security at the airport?
how many different kind of room do you know generally in the hotel?
place your napkin on the lap as soon as you are seated for a western dinner.
we don't need to give tips to bellboy when reaching the hotel in the u.s.a..
it doesn’t matter to make jokes regarding aircraft bombing at the airport.
things those are not eaten like bones should be put on the table when you are having dinner on some formal occasions.
in the west, it is a general practice to send a gift to guests, but the gift is neither too big nor too expensive.
let's ______the transaction at the price of 20 yuan each.(让我们以20元每件成交。)
i'd like to ______my warm welcome to all of you.(我向在座各位致以我热烈的欢迎。)
肌力低下是某些疾病或损伤的常见症状和体征,常见的肌力低下的原因不包括( )
膝关节伸展时,拮抗肌为( )
立定跳远前常常会先下蹲的原因是( )
人在极度激动或危险紧急情况下,能发挥超大力量,原因是( )
徒手肌力评定的结果记录中,患者所测部位存在痉挛时应记录( )
屈髋动作的副动肌包括( )
重复检查同一块肌肉的最大收缩力量时,前后检查以间隔2分钟为宜。
人体肌肉中,红肌纤维比例越高,肌肉耐力越好。
军训端腿时,髂腰肌的收缩形式为等张收缩。
膝关节伸展时,拮抗肌为()
肩胛骨内收及下旋主要动作肌4-5级评定阻力施加的方式是( )
支配三角肌的神经是
前臂旋前的拮抗肌是( )
俯卧撑起时( )
以下不属于完成肩关节内旋动作的主要动作肌是( )
肩胛骨内收主要动作肌的肌力评定时,俯卧位下可以评定( )
肩胛骨“向上旋转”的力是由哪几块肌肉共同作用产生的?( )
背阔肌和胸大肌在近固定时,其收缩可使上臂内收内旋,同时带动肩胛骨间接其下掣及内收。
对肩关节水平外展主要动作肌进行徒手肌力评定,行3级肌力评定时,被检者的应选取仰卧位。
肩关节屈曲1级和0级肌力检查的选择在较舒适的仰卧位。
拇指指间关节屈曲主要动作肌是( )
拇短伸肌的肌力评价中阻力施加部位在( )
拇收肌3级的肌力检查时,前臂应处于什么位置( )
拇指对掌动作的全范围是( )
一般情况下,近节指间关节屈曲正常的活动范围为
手指掌指关节伸展主要动作肌肌力评定时,检查者发现患者仅能完成第2~5指掌指关节伸展部分关节活动范围,肌力为几级?( )
下列属于手指掌指关节屈曲主要动作肌的是( )
关于手指内收的主要动作肌肌力检查动作表述正确的有( )
拇指外展时,如果被检者拇指运动的方向是往前臂的背侧而非垂直于掌面将“虎口”打开,这便是拇短伸肌在起代偿作用。
手指外展的主要动作肌都无法对抗强阻力,区分5级和是基于对侧手的比较与临床经验来判断。
当膝关节处于屈曲位时,髋关节伸展的主要动作肌是( )
以下肌肉不可产生髋关节外展动作的是( )
髋关节外旋主要动作肌肌力评定的2级是( )
进行髋关节内旋主要动作肌肌力评定5级评定时,以下操作描述错误的是( )
膝关节屈曲主要动作肌的肌力评定中,如需重点检查半腱肌半膜肌时应( )小腿
踝关节跖屈主要动作肌的肌力评定时,患者完成足尖着地,然后全脚掌着地,如此连续完成18次,中间动作不休息,未表现出疲劳感者,肌力为( )
完成踝关节背屈与内翻动作的主要肌肉是
进行足外翻主要动作肌肌力评定5级评定时,检查者检查腓骨长肌时,阻力点为( )
髋关节屈曲位外展动作为关节屈曲与外展的复合运动,其屈与展均不充分。
进行髋关节外旋主要动作肌肌力评定1级时,应于大转子后皮下深部触诊外旋肌群。
颈旋转5级肌力评定的为( )
躯干旋转的主要动作肌为( )
在躯干后伸肌力1级与0级评定中,触诊位置一般为 ( )
躯干前屈的正常活动范围是( )
颈旋转主要动作肌的神经支配为( )
下列属于颈后伸的主要动作肌的是( )
在躯干后伸肌力评定中,下列说确的是( )
女性颈椎前凸较男性大,因此其活动角度也比较大。
躯干前屈的3、4、5级肌力评定在仰卧位进行,0、1、2级肌力评定在侧卧位下进行。
骨盆上提的正常活动范围以站立位时一侧骨盆上提,至该侧足可完全离开地面为标准。
对于时间信号,请选择以下说法中正确的。
数字系统的可靠性源于数字信号采用0、1两种状态来表示。0和1由电平的高低、脉冲的有无表示,即使受到一定的噪声干扰,只要在一定范围内,都能很好地识别和恢复0、1。
如果想要实现语音信号的数字化,以便后续处理,须经过:
数字信号在时间和振幅上都是离散的。
左边序列就是反因果序列
因果有限长序列经圆周左移,生成的新序列及所在时间区间有何特点?
两个长度分别为m和n的信号进行卷积得到的新序列的长度为
关于单位阶跃序列,正确的描述是:
关于功率信号和能量信号说确的是
不同频率的连续时间正弦信号经过采样后可能会得到相同的离散时间序列
采样后信号频谱与原信号频谱之间的关系为
对一段4.0秒长的连续时间信号进行无混叠的均匀抽样,产生一段包含8500个样本点的有限长序列,连续时间信号中可能存在的最高频率成分是什么?
由离散时间信号恢复模拟信号的重建滤波器是以下哪种滤波器
只有对无限带宽模拟信号进行采样前才需要抗混叠滤波。
一组(2k 1)个数的中值就是指位于中间的那个数。例如 med{2,-3,10,5,-1}=10。
中值滤波器能有效地滤除随机白噪声。
上抽样器和下抽样器都是时变系统。
当输入不同序列时,线性时不变系统的单位脉冲响应也不同。
任何离散系统的输出序列都等于输入序列和系统单位脉冲响应的线性卷积。
下面用输入输出关系或单位脉冲响应描述的系统中哪个是iir(infinite impulse response, 无限长单位脉冲响应)系统?
在下列线性时不变系统中,具有因果稳定性的是
dtft是单位圆上的z变换。
序列的z变换收敛域的可能形状有:
不同的时域序列可能有相同的z变换表达式及收敛域
双边序列z变换的收敛域形状为环状域或空集。
用部分分式展开法时,假分式可以先化为整式和真分式的和。
序列的z变换收敛域一定不能包含:
传递函数在复平面的什么区域取值后为频率响应?
为了滤除信号中的工频干扰,可将扰的信号通过陷波频率为50hz的陷波器。
欲设计一阶的低通滤波器,可以在单位圆内按哪些方式安排零点和(或)极点?
输出信号的频谱等于输入信号的频谱乘以频率响应,这个关系只适用于iir滤波器。
传递函数完全由零、极点和增益因子(比例常数)确定,其中零、极点确定了频率响应的形状,增益因子不影响频响的形状。
对于系统传递函数下列说确的是
一线性时不变离散时间系统如果是因果稳定的,那么它的零极点位置为
传递函数表达式能唯一地描述一个系统。
设计好的理论上因果稳定的iir滤波器在数字信号处理系统上实现时一定也是稳定的。
借助傅里叶变换并不能使得记录信号的数据量减小
傅里叶变换可以帮助把信号处理的任务变换到可以解决的域中
序列x[n]绝对可和指的是
对周期为n的时域序列做dfs,得到周期为( )的频域周期序列。
对2点时间序列求2点dft,dft变换矩阵为:
序列的dft是同一序列的dtft在 内的均匀采样。
离散傅立叶变换是z变换在 上的等间隔采样。
长度为m的序列,其频谱一个周期内的n点采样造成时域序列以n为周期的延拓,频域不失真采样的条件是m大于等于n。
设复序列x[n]的dft为x[k],x[n]的实部的dft即为x[k]的共轭奇对称分量。
将dft用作频谱分析时,要想提高频率分辨率,可以将时间序列补零,从而增加dft的点数,达到分辨相近频率分量的目的。
将dfs的时域、频域各取主值序列,可构成dft变换对。
8点dft的复数乘法次数和复数加法次数分别是( )。
某输入序列长度是9,可以对其做( )点的基2dit fft?
4点dif fft中,一个4点的dft分解成两个2点dft时,出现几种蝶形图?
利用fft计算idft时,最后要求的是时域序列,而不是频域序列。()
点数分别是11和18的两个序列,实现它们的快速卷积,可用( )点的基2fft实现。
一个蝶形运算包含的复乘数和复加数分别是( )。
8点dif fft流图含有()个蝶形运算。
两个时域序列长度都是50,如果想用基2快速卷积计算两个序列的线性卷积,快速卷积的点数应该选择( )点?
基2dif fft标准流图中,输入序列和输出序列分别是( )。
两个时域序列长度都为100个采样,如果想用基2快速卷积计算两个序列的线性卷积,快速卷积的点数应该选择( )点?
长度为478的时域序列做512点的dft,直接用dft定义式计算和用fft计算所需要的复数乘法次数分别为( )。
下面用dft计算idft的公式正确的是( )。
如果时域序列x[n]的n点dft为{x[0],x[1],……x[n-1]},那么它的n点fft的值也是同样的结果。
fft原位运算是指输入序列按顺序输入( )。
不同的滤波器网络结构,有不同的效果,体现在( )
同一个传递函数可以由不同的等效结构来实现。
一个长度为9的fir滤波器,用级联型结构实现时,需要( )个二阶节:
利用线性相位fir滤波器的对称(或反对称)性质,可以减少近一半数量的乘法器。
iir滤波器的实现结构中,( )结构的运算效率最高。
iir滤波器的实现结构中,( )结构方便控制系统的零点和极点。
iir滤波器的直接i型与直接ii型实现相比,直接i型使用乘法器更少。
考虑有限字长运算,对iir滤波器的直接型、级联型和并联型结构的输出噪声误差大小进行对比,三种结构中输出误差最小的是( )。
正准(canonic)和非正准(noncanonic)实现形式的区别是什么?
关于fir滤波器线性相位实现结构的正确描述有( )
系统用框图实现时基本运算单元有哪些?
iir滤波器级联型结构的优点有哪些( )
滤波器的等效结构是指不同实现结构对应的是同样的传递函数。
iir滤波器的直接ii型实现结构,使用的延迟器个数等于滤波器阶数。
由于频率混叠效应,脉冲响应不变法只适用于设计带限的滤波器。
butterworth模拟低通滤波器的幅频特性随着频率的升高单调下降。
利用模拟滤波器设计iir数字滤波器,如果设计的模拟滤波器是因果稳定的,s平面到z平面变换的下面哪一特点保证数字滤波器也是因果稳定的。
利用模拟滤波器设计iir数字滤波器,s平面到z平面的变换必须满足哪两条基本要求?
用双线性变换法设计iir df时,预畸并不能消除变换中产生的所有频率点的非线性畸变。
采用双线性变换法设计iir df 时,如果设计出的模拟滤波器具有线性幅度响应特性,那么转换后的数字滤波器也具有线性幅度响应特性。
脉冲响应不变法和双线性变换法都能使s平面的左半平面映射到z平面的单位圆内。
双线性变换法使模拟角频率和数字角频率建立线性关系。
脉冲响应不变法使s平面与z平面建立一 一映射关系。
线性相位fir数字滤波器可能的零点个数为( )
fir滤波器与iir滤波器相比较,其优势是fir滤波器都是线性相位的。
线性相位fir df的h[n]=h[n-n],或h[n]=-h[n-n],n为滤波器阶数。
带阻滤波器可以用第( )类线性相位fir df来实现。
某线性相位fir df的h[n]前三个样值是2,-1,3 ,后面的样值为( )时,可以用来设计高通滤波器。
某线性相位fir df的零点含有z=6,z=j,z=1, 则以下说法中正确的是()。
阶数为n的线性相位fir系统的传递函数满足( )
具有线性相位的fir系统,它的单位脉冲响应h[n]满足以下什么条件,n是滤波器阶数。
第二种类型的线性相位fir系统不能做( )滤波器
第一类和第三类线性相位fir df的h[n]=h[n-1-n],n为滤波器长度( )。
第三类线性相位fir df的 h[n]共有7个样值,必有 h[3]=0( )。
频率采样法的截止频率可以控制( )
设计线性相位fir 低通滤波器时,如果要求最小阻带衰减为-60db,则可选用( )。
用矩形窗设计线性相位的fir低通滤波器,主瓣宽度越小,过渡带宽( )。
用矩形窗设计线性相位的fir低通滤波器,产生了肩峰和余振,这是由窗谱的( )决定的。
矩形窗设计线性相位的fir低通滤波器,当窗口大小n增加时,最大肩峰值( )。
窗口法设计线性相位的fir低通滤波器,要改善所设计出的滤波器的性能,以下描述中错误的是( )。
矩形窗口法设计长度为n的线性相位低通fir df,其h[n]满足什么对称性?
窗口法设计出的线性相位fir df是因果稳定的。( )
矩形窗口法设计线性相位的fir数字滤波器时,增加窗口宽度可以增加正肩峰的大小。( )
线性相位fir df窗口设计法的关键是窗口大小( )。
频率采样法的基本思想是使所设计的fir df与所需滤波器的频率特性在某些离散频率点上的值精确相等,在其它频率处有较好的逼近。
会计信息应当反映业务的经济实质,而不仅仅反映其法律形式。这反映的会计信息质量要求是( )。
下列各项中,属于会计核算最终成果的是( )。
下列各项中,属于原始凭证填制要求的有( )。
( )会计工作岗位可以一人一岗、一人多岗或者一岗多人。
( )为提高会计工作效率,经单位会计机构负责人批准,出纳人员可以兼管会计档案保管和债权债务账目的登记工作。
会计凭证包括原始凭证和( )。
当年形成的会计档案,在会计年度终了后,可由单位会计管理机构临时保管( )年,再移交单位档案管理机构保管。
下列会计档案保管期限为永久的有( )。
单位不应当定期对已到保管期限的会计档案进行鉴定,并形成会计档案鉴定意见书( )。
会计档案的保管期限,从会计年度终了后的第一天算起( )。