区块链知识习题测试：公钥和私钥、公有链、元宇宙

8、关于Hash下列说法正确的是？
? A、哈希是一种数学计算机程序，它只能接受固定长度的输入信息，通过哈希算法变换成固定的长度的数据指纹输出形式
? B、哈希是一种数学计算机程序，它可以接受任意长度的输入信息，通过哈希算法变换成固定的长度的数据指纹输出形式
? C、哈希使存储和查找信息的速度变的更慢，因为哈希值通常是固定的长度的数据
? D、哈希使存储和查找信息的速度变的更快，因为哈希值通常是不固定的长度的数据


正确答案：C
答案解析：哈希使存储和查找信息的速度变的更慢，因为哈希值通常是固定的长度的数据

8, xff1f;
? A, Hashi is a mathematical computer program xff0c; it can only accept input information of fixed length xff0c; data fingerprint output form
converted to fixed length by the Hashi algorithm?B, Hashi is a mathematical computer program xff0c; it can accept input information of any length xff0c; data output of fixed length by Hashi algorithm is
? C, Hashi is slower for storing and searching information xff0c; data of fixed length
for storing and searching information; data of regular length
for Hashi are faster for storing and searching information
? D, Hashi is faster for storing and searching information xff0c; data of unfixed length

for storing and h ~ hp h hp hp; data of hpp x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

9、2018年2月2日 ，工信部指导发布了（）技术指导文件。这是中国在推进区块链技术进一步脱虚向实，助力实体经济发展的又一项重要文件
? A、《区块链 参考架构》、《区块链 数据格式规范》
? B、《区块链白皮书》
? C、《全球区块链现状报告》
? D、《比特币：一种点对点的电子现金系统》


正确答案：A
答案解析：2018年2月2日 ，工信部指导发布了《区块链 参考架构》、《区块链 数据格式规范》等技术指导文件。这是中国在推进区块链技术进一步脱虚向实，助力实体经济发展的又一项重要文件。

9 & #xff0c February 2nd, 2018: Guidance from the Ministry of Technology issued （ & #xff09; Technical Guidance Document. This is China's further dissipation of block chain technology to xff0c; another important document on economic development of enabling entities
?A, Block Chain Reference Frame, Block Chain Data Format Standard
?B, Part Chain White Paper
?C, Status of Global Block Chains Report
?D, Bitcoin #xff1a; a point-to-point electronic cash system


Correct answer #xff1a; A
Answer Solving #xff1a; 2 February 2018 & #xff0c; Guidance from the Department of Industry and Communications issued a technical guidance document on the development of the Block Chain Reference Architecture, Data Format, etc.

10、关于哈希值，下列说法中正确的是
? A、Hash是计算机科学中的一个术语，意思是输入任意长度的字符串，然后产生一个固定长度的输出
? B、改变明文中任意一个字母，得到的哈希值有可能相同
? C、哈希算法只有一种
? D、每次哈希计算得到的哈希值长度是不固定的


正确答案：A
答案解析：改变明文中任意一个字母，得到的哈希值不相同； 哈希算法包括MD5、SHA等多种算法； 相同的哈希算法的输出值的长度是固定的；

10, with regard to Hashi & #xff0c; the correct expression is
? A, Hash is a term in computer science & #xff0c; meaning to enter a string of any length & #xff0c; then to produce an output of a fixed length
?B, to change any of the specified letters xff0c; to change any of the letters
?C, Hash has only one
?D, the length of Hashi calculated each time is variable




> > the correct answer #xff1a; A
the answer to interpret xff1a; to change any of the letters xff0c; to have different Hashi values ; Hashi's calculation includes MD5, the multiple algorithms of SH #xff1b; the length of the same Hashi #x1;

11、下面关于Token的说法错误的是
? A、在计算机中，“令牌”一词有两个意思：对用户进行授权的小工具，或是认证用户身份的固定字符串
? B、在加密货币中令牌是数字价值的一个单位，是内置可编程潜力的代币
? C、加密货币中，令牌出了具备经济属性外，同时也可用以构建软件，并可能通过技术实现集代币、身份识别、荣誉标识、确权工具、资产量化指标、系统通行证和系统保护于一身的工具
? D、令牌主要分为：支付令牌、功能令牌、数字令牌


正确答案：D
答案解析：密保令牌、会话令牌、令牌化技术

11, the following statement about Token is incorrect:
?A, xff0c in the computer; the word xff1a; a small user-authorized tool xff0c; or a fixed string that certifies user identification
?B, a unit in an encrypted currency where the command card is a digital value xff0c;
?C, ff0c in an encrypted currency; xff0c; xff0c; ff0c; can also be used to build software xff0c; and may use technology to achieve central currency, identification, honour marking, authentication tools, asset quantification indicators, system passes and systems to protect one body
?D, the command plate is divided mainly into xff1a; payment, function, numerical order


> ; Dbr/x1 & ff ;

12、下面关于以太坊叔块率的说法错误的是？
? A、叔块不能进入主链，所以是完全无效的。
? B、更小的块的传播速度更快，叔块产生概率更低。
? C、如果网络产生的叔块概率提高，那么矿工将需要降低燃料限制。
? D、叔块目前是以太坊特有的概念


正确答案：A
答案解析：Ethereum的GHOST协议，不认为孤块没有价值，而是会给与发现孤块的矿工以回报。在以太坊中，孤块被称为“叔块”(uncle block)，它们可以为主链的安全作出贡献。

12, xff1f;
? A, uncle cannot enter the main chain & #xff0c; so it is null and void.
? B, smaller pieces spread faster xff0c; uncles generate lower probability.
?C, if the probability of an uncle from the network increases xff0c; the miners will need to lower the fuel limit.
? D, uncle is currently the concept unique to the family

> the correct answer xff1a; A
the answer explains #xff1a; Etheum's GHOST #xff0c; not think that an orphan has no value xff0c; it will give return to miners who find a miner.

13、截止到2019年1月份，在比特币区块链中，中国拥有的全节点数是多少？
? A、约占全球的10%
? B、约占全球的15%
? C、约占全球的4%
? D、约占全球的6%


正确答案：C
答案解析：2019年1月26日，当前全球共有比特币全节点10246个，位于美国的全节点数量最多，占比为24.55%，而中国的全节点数量排在第五，占比为4%

13 xff0c until January 2019; xff0c in the Bitcoin block chain; xff0c; how many full nodes are owned by China xff1f;
?A, about 10%
globally?B, about 15%
globally?C, about 4% globally
?D, about 6% globally



> rxff1a; C
answer resolution xff1a; 26 January 2019 xff0c; currently there are 10246 xff0c in Bitcoins worldwide; the highest number of full nodes in the United States xff0c; the ratio is 24.55% xff0c; and the total number of days in China is 5xff0c;

14、拜占庭将军问题解决了那些问题？
? A、分布式通讯
? B、共识机制
? C、内容加密
? D、领土纠纷


正确答案：A
答案解析：分布式账本可以说是区块链的框架，每一个人都可以自由地参与进来，共同处理区块链中的数据。 基于这一点，区块链实际上就是一个大的分布式计算网络，它并没有一个类似中央指挥式的东西来发号施令，整个网络是完全分散的要依靠不同的节点间彼此交换信息达成共识，才能统一行动，整个过程就像无领导小组讨论一样，对此，有人就提出了疑问，万一有节点发送了错误的信息，干扰网络正常运行，或者大家产生了分歧怎么办？于是，学者们便建立了一个模型统一将这类问题称为拜占庭将军问题。

14 The question of General Byzantine resolved those questions xff1f; br/>; A, distributed newsletter
?B, consensus mechanism
?C, content encryption
?D, territorial dispute
xff1a; A
answers to xff1a; Distribution books can be said to be the framework of the block chain xff0c; everyone can freely participate xff0c; data in the block chain are processed together. Based on this xff0c; the block chain is actually a large distribution network xff0c; it does not have a central command #xff0xxxx0xxxxxxxxxxxxxxxxxxxxxxxffxxxxxxxxxxxxfxfxxxxxxxxxxxxxfxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ff.xxx.x.ff.xx.x.x.x.x.ff.xx.x.x.x.x.x.x.x.x.x.

15、全球发行首个国有“电子货币系统”的国家是_______。
? A、厄瓜多尔
? B、毛里求斯
? C、墨西哥
? D、智利


正确答案：A
答案解析：厄瓜多尔2014年12月就推出了“电子货币系统”,并于次年2月开始正式运营,厄瓜多尔也成为全球第一个拥有国有电子货币系统的国家。

15 The first country to be issued globally as an “e-money system” is ___.
? A, Ecuador
? B, Mauritius
? C, Mexico
? D, Chile

< > xff1a; A
solution xff1a; Ecuador launched the “e-money system” in December 2014 and became the first country in the world to have a State-owned e-money system.

16、2014年哪个国家发布了比特币税收准则？
? A、美国
? B、澳大利亚
? C、德国
? D、日本


正确答案：B
答案解析：2014年澳大利亚税务局（ATO）发布了比特币税收准则。

16, Which country issued the Bitcoin Tax Guidelines & #xff1f;
?A, United States
?B, Australia
?C, Germany
?D, Japan


xff1a; B
parsing & #xff1a; 2014 Australian Revenue Authority & #xff08; ATO #xff09; issued Bitcoin Tax Guidelines.

17、信用证的当事人不包括
? A、申请人
? B、开证银行
? C、受益人
? D、服务人


正确答案：D
答案解析：信用证的当bai事人主要有开证申请人、开证银du行、受益人等。 1、开证zhi银行，是指应开证申请人的要求开立dao信用证的银行，一般为进口商所在地银行。开证银行应根据开证申请人的要木及时、正确地开立信用证 2、开证申请人，指向银行申请开立信用证的人，即进口商 3、受益人，指信用证上明确指定并由其接受信用证，凭发票、提单等收取货款的人，即出口商。

The parties to the letter of credit do not include
?A, the claimant
?B, the issuing bank
?C, the beneficiary
?D, the service provider


the answer to the letter of credit xff1a; the person applying to the bank for the opening of the letter of credit xff0c; i.e. the importer 3, the beneficiary xff0c; i.e., the bank that opened the letter of credit at the request of the author of the certificate of credit xff0c; i.e., the bank that specified and accepted the letter of credit xffc; i.e., the person requesting the opening of the letter of credit; i.e., the holder of the letter of credit #xfffffff; i.e.f.f., the exporter; i.e. x.f.f.f.f.

18、51％攻击能做什么？
? A、修改自己的交易记录，这可以使他进行双重支付
? B、修改变每个区块产生的比特币数量
? C、凭空产生比特币
? D、把不属于他的比特币发送给自己


正确答案：A
答案解析：51%攻击能够做什么？ 1. 修改自己的交易记录，这可以使他进行双重支付； 2. 阻止区块确认部分或者全部交易； 3. 阻止部分或全部矿工开采到任何有效区块。

18, 51 xff05; what can an attack do xff1f;
?A, modifying his own transaction log xff0c; this allows him to double-pay
?B, modifying the amount of bitcoin generated by each block
?C, producing bitcoin
by air?D, sending his own


, correct answers xff1a; A
answers explaining xff1a; 51% of attacks can do xff1f; 1. Modifying his own transaction log xff0c; this allows him to double-pay xff1b; 2. Blocking a section from confirming part or all of his transaction xff1b; 3. Preventing part or all of the miner from extracting any effective block xff1b; 3.

19、在区块链溯源应用5层架构中，下面对核心层描述不正确的是
? A、核心层是区块链系统的最重要的组成部分
? B、会影响整个系统的安全性和可靠性
? C、核心层是溯源应用落地过程中必不可少的重要组件
? D、共识机制与P2P 网络传输是区块链的核心技术


正确答案：C
答案解析：核心层是区块链系统的最重要的组成部分，将会影响整个系统的安全性和可靠性。如共识机制、P2P网络传输、隐私保护；

The core layer is the most important component of the block chain system
?B, which affects the safety and reliability of the entire system
?C, the core layer is the essential component of the retrospective application
?D, the consensus mechanism and P2P network transfer are the core technology of the block chain

> ; C
the correct answer #xff1a; the core layer is the most important component of the block chain system #xff0c; it will affect the security and reliability of the system as a whole. e.g. consensus mechanisms, P2P network transmission, privacy protection #xff1b;

20、关于区块链以下说法正确的是？
? A、单一的新技术
? B、新型加密货币
? C、绝对安全的存储模式
? D、智能合约非合同


正确答案：D
答案解析：什么是区块链？从科技层面来看，区块链涉及数学、密码学、互联网和计算机编程等很多科学技术问题。从应用视角来看，简单来说，区块链是一个分布式的共享账本和数据库，具有去中心化、不可篡改、全程留痕、可以追溯、集体维护、公开透明等特点。

20, The correct description of the block chain is xff1f;
?A, a single new technology
?B, new encryption currency
?C, absolute secure storage mode
?D, smart contract non-contract

br/> correct answer xff1a; D
answer resolution xff1a; what is a block chain xff1f; xff0c at the scientific and technical level; the block chain involves many scientific and technical questions such as mathematics, cryptology, Internet and computer programming.

21、零知识证明是20世纪80年代初由计算机科学家Goldwasser和Micali等人共同提出的一项技术，下面对零知识证明的性质正确的是？
? A、合理性；封闭性；完备性；
? B、完备性；零知识性；封闭性；
? C、零知识性；合理性；完备性；
? D、封闭性；零知识性；合理性。


正确答案：C
答案解析：零知识证明主要是指证明者能够在不向验证者提供任何有用信息的情况下，使验证者相信某个论断是正确的。零知识证明具有以下三个性质： 1.完备性 completeness：如果证明方和验证方都是诚实的，并遵循证明过程的每一步，进行正确的计算，那么这个证明一定是成功的，验证方一定能够接受证明方。 2.合理性 soundness：没有人能够假冒证明方，使这个证明成功。 3.零知识性 zero-knowledge：证明过程执行完之后，验证方只获得了「证明方拥有这个知识」的信息，而没有获得关于这个知识本身的任何信息。

The following is a technical xff0c, which was proposed by computer scientists Goldwasser and Micali, among others, in the early 1980s; xff1f; br/>?A, reasonableness xff1b; closed xff1b; completeness xff1b;
?B, completeness xff1b; zero knowledge xff1b; closed xff1b; true xff1; true xff1b; sound xff ff ff

22、加密货币如果设置过短的确认时间会更容易导致什么出现？
? A、高效率
? B、低效率
? C、孤块
? D、双花


正确答案：C
答案解析：如果节点收到了一个有效的区块，而在现有的区块链中却未找到它的父区块，那么这个区块被认为是“孤块”。孤块会被保存在孤块池中，直到它们的父区块被节点收到。一旦收到了父区块并且将其连接到现有区块链上，节点就会将孤块从孤块池中取出，并且连接到它的父区块，让它作为区块链的一部分。当两个区块在很短的时间间隔内被挖出来，节点有可能会以相反的顺序接收到它们，这个时候孤块现象就会出现。

22 An encrypted currency with a short confirmation time is more likely to lead to xff1f;
;
; A, efficiency
? B, inefficiency
? C, solitary
? D, double flower

xff1a; C
answer to ff1a; ff1a; If an effective block xff0c is received at the node; if a parent xff0c is not found in the existing block chain xff0c; then this block is considered to be “separated” in the pool xff0c; until their parent block is received at the node. Once the parent block is received and it is connected to the existing block xf0; it is likely that the node will be removed from the cell x0c; it will be removed as part of the node; it will be removed from the node ~ 0xxx ~ ~ ~0x4x to the node; it will be removed as part of the node ~ 0x to the no.ff.

23、比特币如何保证挖矿时间的恒定？
? A、系统强制要求，必须在规定的时间内挖到矿
? B、根据交易的笔数来确定挖矿的时间
? C、比特币系统靠调节难度系数保证
? D、矿工们一致约定的时间


正确答案：C
答案解析：比特币的区块平均每10分钟生成一个。这就是比特币的心跳，是货币发行速率和交易达成速度的基础。不仅是在短期 内，而是在几十年内它都必须要保持恒定。在此期间，计算机性能将飞速提升。此外，参与挖矿的人和计算机也会不断 变化。为了能让新区块的保持10分钟一个的产生速率，挖矿的难度必须根据这些变化进行调整。事实上，难度是一个动 态的参数，会定期调整以达到每10分钟一个新区块的目标。简单地说，难度被设定在，无论挖矿能力如何，新区块产生 速率都保持在10分钟一个。

23, how does Bitcoin guarantee xff1f;
; ; system enforcement requirements xff0c; must be dug
within a specified time frame?B, which determines the time of mining according to the number of pens traded
?C, Bitcoin is guaranteed
by an adjustment difficulty factor? D, miners agree on



> ; A, system enforcement requirement xff0c; B, which produces xff1a per ten minutes on average. This is the basis for the speed of distribution of money and the speed of trading. Not only in the short term #xff > ; it must be kept constant for decades x ff

24、区块链密封的关键？
? A、共识机制
? B、哈希函数
? C、分布式记账
? D、投票机制


正确答案：B
答案解析：哈希函数在区块链当中起着至关重要的作用，它的做法是将繁杂的交易信息加密压缩成固定字节的简单哈希值，并成为该区块的标识，保证区块链中交易信息不被篡改。

24, Key xff1f;
? A, Consensus mechanism
? B, Hashi function
? C, Distributed account
? D, Voting mechanism

xff1a; B
answer solution xff1a; the Hash function plays a vital role in the block chain xff0c; its approach is to encrypt complex transaction information into a simple Hashi value of fixed bytes xff0c; it becomes the identification of the block xff0c; and it ensures that transaction information in the block chain is not altered.

25、下列加密货币及其对应技术，匹配正确的是：
? A、Monero（门罗币）：环形签名技术；
? B、Zcash（零币）：混币技术；
? C、Dash（达世币）：零知识证明；
? D、Zcash（零币）：环形签名技术。


正确答案：A
答案解析：零币使用的是零币协议，达世币使用的是混币技术

25/ The following encrypted currency and its corresponding technology xff0c; the correct matches are xff1a;
?A, Monero（ Menro xff09; xff1a; circular signature technology xff1b;
?B, Zcash&Xff08; zero currency xff09; xff1a; xff1b;
; ; D, Zcashff08; xff09; xff1; xff1;

br/> ;

1、制约我国商业保险发展的因素有哪些？
A、保险市场发育不完善B、保险经营机制不完善C、员工队伍素质不齐D、经济发展水平相对落后，发展不平衡


正确答案：ABCD
答案解析：以上均是制约我国商业保险发展的因素。

1. xff1f;
A; underdevelopment of the insurance market B; underdevelopment of the insurance system C; poor quality of the workforce D; relatively poor level of economic development br/>

the correct answer xff1a; ABCD
the analysis of xff1a; these are the factors that constrain the development of commercial insurance in the country.

2、目前在信贷风控的哪些方面应用了大数据技术？
A、反欺诈审查B、风控模型C、风险预警D、贷后催收


正确答案：ABCD
答案解析：反欺诈审查中网贷黑名单、联系人及通话详单反欺诈用到了大数据技术；风控模型就是大数据风控的核心，是采集大量的数据构建评分卡，进行智能化的风险评分；贷中风险预警是通过对还款数据进行实时监测，进行预警提醒；贷后催收是对逾期客户进行催收，通过催收评分卡对逾期客户进行客户分层，以实施不同的催收方式。

2 & #xff1f;
A, anti-fraud review B, wind control model C, risk early warning D, post-prior reminders


Correct answer & #xff1a; ABCD
answer parsing #xff1a; anti-fraud review Internet-based blacklists, contact persons and call details counter-fraud technology xff1b; wind control model is the core of big data control xff0c; collection of a large number of data construction scorecards xff0c; smart risk rating xff1b; loan risk warning is implemented through real-time monitoring of returned data xff0c; early warning alerts xff1b; post-credit recovery is a catalyst for late customers xff0c; client classification #xff0c is implemented in different ways.

3、大数据的4V特征包括
A、大量B、多样C、价值D、高速


正确答案：ABCD
答案解析：大量（Volume）：数据的大小决定所考虑的数据的价值和潜在的信息；多样（Variety）：数据的来源包括数字、文本、图片、语音等结构化和非结构数据，数据类型多样；价值（Value）：以低成本创造高价值；高速（Velocity）：数据增长快，数据处理速度快

3 The 4V features of big data include
A, large number of B, diversity C, value D, high speed



< > xff1a; ABCD
answer solution xff1a; mass xff08; Volume #xff09; xff1a; value and potential information for data size determination xff1b; xff08; xff08; xff09; xff1a; sources of data include figures, text, photographs, voice, etc., structured and non-structured data #xff0c; data types #xff1b; value xff08; Value xff09; xffffff1a; high value creation at low cost #xff1b; high speed xff08; high speed xff08; Velocity #xff1a; #xxx0

4、国际三大企业信用评级机构是
A、标准普尔B、穆迪C、惠誉国际D、中诚信


正确答案：ABC
答案解析：大数据征信的数据来源广泛，不仅仅是信贷交易数据，还包括社交、购物、浏览网页等，数据多样，并能够在线实时更新数据，相较于传统征信，更有效更及时。

4. The three major international corporate credit rating agencies are
A, Standard & Poor's, MoodyC, Fitch International D, Good Will


Correct Answers & #xff1a; ABC
Answer Solving & #xff1a; Data from a wide range of data sources xff0c; not only credit transaction data xff0c; Socialization, shopping, browsing web pages, etc. xff0c; Data Diversity xff0c; and the ability to update data online and in real time xff0c; More efficient and timely than traditional letters #xff0c.

5、大数据风控技术在信贷领域的作用是
A、好坏客户识别B、降低企业损失C、用户资质分层D、利润最大化


正确答案：ABCD
答案解析：运用大数据风控技术对借款人进行风险识别、风险控制和风险提示，可以识别好坏客户，实现用户的信用资质分层，通过拒绝坏客户，通过好客户，降低企业损失，实现企业利润最大化。

The role of big data wind control technologies in the area of credit is
A, good and bad customer identification B, reduced business loss C, user qualification stratification D, profit maximization


< < > br/> Correct answer & #xff1a; ABCD
answer solution & #xff1a; use of big data wind control technology to identify risks to borrowers xff0c; to identify good and bad customers xff0c; to achieve credit quality stratification by users xff0c; to reject bad customers xff0c; to reduce business losses xff0c; and to maximize business profits.

6、区块链在金融业的应用场景包括（）
A、数字货币B、票据与供应链C、支付清算D、信贷融资


正确答案：ABCD
答案解析：在金融领域，区块链技术已在数字货币、支付清算、票据与供应链、信贷融资、金融交易、证券、保险、租赁等细分领域从理论探索走向实践应用；在企业级市场，区块链技术当前主要应用于企业间的关联交易、对账等活动；在物联网领域，区块链技术可以被用于追踪设备的历史数据，从而协调处理设备与设备之间的交易，未来的应用场景包括对分布式光伏、水电表、电子病历等领域大数据的记录、保存及管理。

6. The site of the block chain in the financial sector includes xff08; xff09;
A, digital currency B, instrument and supply chain C, payment clearing D, credit finance


correct answers xff1a; ABCD
answers xff1a; in the financial field xff0c; in the areas of payment, paper and supply chain, credit finance, financial transactions, securities, insurance, leasing, etc., sector chain technology has been used to track the historical data of the equipment xff0c; in order to coordinate the processing of transactions between equipment and equipment xff0b; in the business-level market xff0c; in the future, block chain technology is being used mainly for inter-firm linkages transactions, account reconciliation xff1b; in the area of physical networking xff0c; and in the areas of record keeping and management of data xff0c; and in the future applications, including distributional, hydro, hydro, electronic and disease.

7、供应链金融产品主要分为哪几类业务？（）
A、存货类B、预付类C、应收类D、订单类


正确答案：ABC
答案解析：供应链金融产品主要分为哪几类业务

7 The main lines of operations for supply chain financial products are xff1f; xff08; xff09;
A, inventory category B, prepaid category C, receivable category D, purchase order category

Correct answer xff1a; ABC
answer resolution xff1a; supply chain financial products are mainly classified into operations

8、开展订单融资业务，我行应优先选择符合以下条件的买方？
A、为行业内优质的全国性或区域性龙头企业，细分市场的领先企业B、总行级重点客户名单内的企业C、积极配合我行对订单融资在卖方准入、订单真实性确认、回款账户唯一性确认等方面开展合作的客户D、愿意向我行推荐其优质供应商开展订单融资业务的客户


正确答案：ABD
答案解析：积极配合我行对订单融资在买卖双方准入、订单真实性确认、回款账户唯一性确认等方面开展合作的客户

8. Carrying out order financing business & #xff0c; I shall give priority to the selection of buyers & #xff1f;
A, a national or regional leader of high quality industry & #xff0c; leading firm B, a company C in a list of priority clients at the head office level in the market; client D, who actively collaborates with me in order financing cooperation in terms of seller access, order authenticity confirmation, unique confirmation of return account; customer

willing to recommend to me that its high-quality supplier conduct order finance business > #xff1a; ABD
answer solution & #xff1a; client who actively cooperates with me on purchase order finance cooperation in terms of access, order authenticity confirmation, sole confirmation of return account

9、基于区块链的农业保险优势在于？（ ）
A、提高保险企业利润B、“时间戳”功能，使数据真实可用C、扩大农业保险覆盖范围D、智能合约，系统自动赔付


正确答案：BCD
答案解析：“时间戳”功能，使数据真实可用；扩大农业保险覆盖范围；智能合约，系统自动赔付

9. The advantages of block-based agricultural insurance are in xff1f; xff08; & #xff09;
A, improving the profits of the insurance enterprise B, the "time stamp" function xff0c; making the data genuinely available C, expanding agricultural insurance coverage D, smart contracts xff0c; system automatic payment


correct answer xff1a; BCD
answer solution xff1a; time stamp function xff0c; real availability xff1b; expanded agricultural insurance coverage xff1b; smart contract xff0c; system automatic payment

10、国际贸易金融中，区块链的解决方案的优势在于（）
A、节省中间人的费用B、减少对手方风险C、订单细则实时查询D、实现监管的透明化


。 正确答案：ABCD
答案解析：节省中间人的费用 减少对手方风险 订单细则实时查询 实现监管的透明化

10 xff0c in international trade finance; solutions to block chains have the advantage of xff08; xff09;
A, savings for intermediaries B, reduction of counterparty risk C, real-time search for order rules D, transparency of regulation


. Correct answer xff1a; ABCD
answer solution xff1a; savings for intermediaries; reduction of counterpart risk; real-time search for orders

1、梅克尔树（又叫哈希树）是一种二叉树
? 对
? 错


正确答案：对
答案解析：梅克尔树的基本概念

1; Merkel Tree #xff08; Hashi Tree #xff09; it's a two-fork tree
to



to correct answer #xff1a;
to interpret the answer xff1a; the basic concept of the Merkel tree

2、区块链中的第一个区块被称为“创世”区块
? 对
? 错


正确答案：对
答案解析：创世区块的概念

2. The first block in the block chain is called
? For



the correct answer xff1a; for
the answer to xff1a; for the concept of br/> the creation block

3、公私钥是非对称加密技术，公钥和私钥不同，但是可以基于私钥生成公钥
? 对
? 错


正确答案：对

Public and private keys are asymmetric cryptography & #xff0c; public and private keys are different xff0c; but public keys
can be generated on the basis of private keys?




correct answer #xff1a; right

4、区块链分为两类，即公有链、私有链（）
? 对
? 错


正确答案：错
答案解析：区块链分为三类，即公有链、私有链、联盟链

4. Block chains are divided into two categories xff0c; i.e. public chains, private chains xff08; xff09;
? for


correct answers xff1a; br/ > answers to xff1a; sector chains are divided into three categories xff0c; i.e. public, private, union chains

5、DCEP中所谓的双离线支付，指的是像纸钞一样实现满足飞机、邮轮、地下停车场等网络信号不佳场所的电子支付需求
? 对
? 错


正确答案：对
答案解析： DCEP中所谓的双离线支付，指的是像纸钞一样实现满足飞机、邮轮、地下停车场等网络信号不佳场所的电子支付需求

5. The so-called two-way payments in DCEP & #xff0c; e-payment needs for low signal locations such as aircraft, cruises, underground garages
? for




xff1a ; e-payment needs for poor network signals such as
; e-payment needs for xff1a > for
answers; e-link payments xff0c in DCEP; e-payment needs for poor network signals such as paper banknotes

6、区块链等于分布式账本（）
? 对
? 错


正确答案：错
答案解析：区块链是一种分布式账本，但是它又不完全等同超级账本，分布式账本是分布在多个节点或计算设备上的数据库，分布式网络中的每个节点复制并存储一份相同的账本副本。区块链只是分布式账本技术的一种形式，区块链分布在点对点的网络上并由其管理。

The block chain is a distributed account book xff08; xff09;
for



the correct answer xff1a; the wrong
answer to xff1a; the block chain is a distributed account book xff0c; but it is not fully identical to the superbook xff0c; the distributed account book is a database distributed on multiple nodes or computing devices xff0c; a copy of the same account book is copied and stored for each node in the distributed network. The block chain is only a form of distributed book technology xff0c; the block chain is distributed over a network of point-to-points and managed by it.

7、区块链是一种去中心化的分布式共享记账技术，它要做的事情就是让参与的各方能够在技术层面建立信任关系
? 对
? 错


正确答案：对

7. Block chains are a decentralised distributed shared bookkeeping technique xff0c; what it does is it allows the parties involved to build a relationship of trust at the technical level
to
? Wrong


correct answer xff1a; right

8、比特币一共有2100万枚
? 对
? 错


正确答案：对
答案解析：比特币初始2100万枚，初始奖励50比特币

8. Bitcoin has 21 million
for


>br/
for the correct answer #xff1a; parsing
for the answer xff1a; Bitcoin has 21 million initial xff0c; initial reward 50 bitcoin

9、区块链的数据具有不可篡改的特性
? 对
? 错


正确答案：对

?
? Wrong

; right answer #xff1a; right

10、在区块链中，通过解决一个数学难题来证明自己的工作量。这个数据难题就是，对一个数字串进行两次SHA256运算，如果得到的数，小于一个指定的值，就算是成功。否则，要通过不断的尝试试错，来求解这个数
? 对
? 错


正确答案：对

10, in the block chain & #xff0c; attesting to its workload by solving a mathematical problem. The data problem is & #xff0c; double SHA256 calculations for a numerical string & #xff0c; if the number xff0c; is less than a given value xff0c; even if it is successful. xff0c; solves this number by constantly trying error br/ >?


> correct answer #xff1a;

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