《开放英语四》在线作业二

《开放英语四》在线作业二

1. -What day is it today? -_____________.

A. Today is March 25th

B. Today is Saturday

C. Today is fine

D. Today is cold

正确答案：B 满分：5 分得分：5

2. The advertisement can __________ seen in all the top newspapers.

A. 不填

B. being

C. to

D. be

正确答案：D 满分：5 分得分：5

3. The completed report was sent out by __________?

A. whom

B. who

C. which

D. what

正确答案：A 满分：5 分得分：5

4. Can you help me ______________ the bag please?

A. at

B. with

C. for

D. to

正确答案：B 满分：5 分得分：5

5. __________ average women live longer than men.

A. By

B. In

C. On

D. From

正确答案：C 满分：5 分得分：5

6. -I haven't seen Billy for 10 years. -____________

A. Either have I.

B. So have I.

C. Haven't I.

D. Neither have I.

正确答案：D 满分：5 分得分：5

7. Toxic chemical must __________ safely.

A. transported

B. be transported

C. be transport

D. to be transported

正确答案：B 满分：5 分得分：5

大学英语二第二次作业

题号:1 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 __________ each question, the teacher writes the correct answer and three other statements that look like correct ones. ?A、As to ?B、Except fo ?C、Along with ?D、In addition 标准答案：c 说明： 题号:9 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 The army has _____________ a successful attack on the anti-government organization. ?A、computerized ?B、achieved ?C、scheduled ?D、completed 标准答案：d 说明： 题号:2 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 __________ brought up and educated in Chicago, the author is most famous for his stories about New York City. ?A、Since ?B、As

?C、Although ?D、When 标准答案：c 说明： 题号:3 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 ____________ all the electronic devices, computers have the greatest significance in modern technology. ?A、On ?B、In ?C、with ?D、Of 标准答案：d 说明： 题号:4 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 If we compare the weather in Nanjing ___________ in London, we find there are many differences. ?A、with it ?B、with that ?C、and ?D、with 标准答案：b 说明： 题号:5 题型:单选题（请在以下几个选项中选择唯一正确答案）本题分数:2 It will not take more than five hours ____________ to Beijing by train by the end of the year.

2012年下半年大学英语三第二次作业

大学英语（三）(19000003) > 课程作业> 复查测验：2012年下半年大学英语三第二次作业 复查测验：2012年下半年大学英语三第二次作业 用户2012秋入学专升本 已提交12-10-17 下午11:22 名称2012年下半年大学英语三第二次作业 状态已完成 分数得94 分，满分100 分 说明 问题1得3 分，满分3 分 一、交际英语（每题3分，共30分） 1、- Good-bye for now. - _________ 所选答案： C. See you. 问题2得3 分，满分3 分 2、- How do I get to the cinema? - _________ 所选答案： D. Go down this street and turn left. 问题3得3 分，满分3 分 3、— Hi, Tom, how's everything with you? — , and how are you? 所选答案： B. Hm, not too bad. 问题4得3 分，满分3 分 4、- Wow! This is a marvelous room! I've never known you're so artistic.

- ______ 所选答案： C. Thanks for your compliments. 问题5得3 分，满分3 分 5、–How was your trip to London, Jane? – _____________________ 所选答案： A. Oh, wonderful indeed. 问题6得3 分，满分3 分 6、–Oh, sorry to bother you. –__________________. 所选答案： A. That’s Okay. 问题7得3 分，满分3 分 7、--Excuse me, could you tell me how to get to the post office? -- _____________. 所选答案： D. Sorry, but I am a stranger here myself 问题8得3 分，满分3 分 8、- Could you help me with my physics, please？ - ________ 所选答案： D. Sorry I can't. I have to go to a meeting right now. 问题9得3 分，满分3 分 9、-- Congratulations! You won the first prize in today's speech contest. -- ________ 所选答案： C. Thank you. 问题10得3 分，满分3 分 10、- Do you mind my smoking here? - _______

大学英语( 2 )第二次网络作业答卷纸

大学英语 （2）第二次网络作业（新教材） 一、阅读： ( 1 ) One important cause of the generation gap is the opportunity that young people have to choose their own ways of life. In a more traditional society, when children grow up,they are expected to live in the same area as their parents,to marry people that their parents know and like, and often to continue the family jobs.In our society,young people often travel great distances for their education, move out of the family at an early age,marry or live with people whom their parents have never met,and choose jobs different from those of their parents. 1. The first paragraph tells us that __A__. a.the problem of the generation gap draws much attention from people 2. In a more traditional society, old people___A__. a. have their children respect and listen to them b. do not care for their children at all c. expect their children to rebel against them d. do not live together with their children 3. In American society young people___B___. a. do not need to find jobs b. leave home at an early age

大学英语(3)第二次作业题及答案.doc

第2次作业 一、阅读理解（本大题共100分，共5小题，每小题20分） 1. Prehistoric men and women enjoyed a more varied diet than people do now, since they ate species of plant and several hundreds thousands types of living things. But only a tiny percentage of these were ever domesticated. Modern shops have hastened a trend towards specialization which began in the earliest days of agriculture. The food of the rich countries has become cheaper relative to wages. It is speedily distributed in supermarkets. But the choice annually becomes less and less great. Even individual foods themselves become more standardized. We live in the world of carrot specially blunted in order to avoid making a hole in the bag, and the tomato grown to meet a demand for a standard weight of weighting tomatoes to a kilo. Siri von Reis asks: "Only the three major cereals (谷物类食物)and perhaps ten other widely cultivated species stand between famine and survival for the world" s human population and a handful of drug plants has served Western civilization for several thousand years. A rather obvious question arises: Are we missing something?” After all, there are 800 000 species of plant on earth. (1). Tn prehistoric times people. A.ate much more than we do today B.lived mainly on plant food C.had a wide-ranging diet D.were more fussy about what they ate (2). Most of us have come to expect A. no variation in our diet B. a reduction in food supplies C. a specialist diet D. food conforming to a set standard (3). The specialization of food was started by

硅胶作业指导书

硅胶制作指导书 制作流程及各流程操作方法： （1）硅胶模具的处理 模具在合模压胶之前必须用清水或酒精除去表面的毛刺、硅胶碎屑及油污等杂质，确保模具干净才能合模压胶。将清理干净的公母模合模后锁紧，锁紧模具按对称原则依次锁紧螺栓，这样可以避免模具配合偏移降低胶粒的不合格率，把模具锁紧后就可以进行注塑压胶。新模具压胶必须清理干净后用二次元检测新模具各尺寸合格后才可进行下一步操作。 （2）硅胶与固化剂的配比 成型的硅胶是由硅胶和固化剂经过一定的配比固化后的产物。目前我公司用的硅胶一般都是白色，固化剂是绿色或蓝色，配比按６：１来配。即硅胶６克，固化剂１克（６６４型号的硅胶按１０：１配）。硅胶和固化剂一定要在电子称上称准确，测量无误。如果是用量杯，每次称量要检查量杯是否干净。 注意：在制作特殊要求的硅胶产品时可对固化剂的添加量进行调整，硅胶的硬度随着固化剂的增加而提高，同时也增加的硅胶的脆性，降低硅胶的韧性、使用寿命和密封性等！ （3）硅胶与固化剂的搅拌 硅胶外观是流动的液体，制作时按以上所讲的配比将硅胶与固化剂倒入拌胶罐内用勺子搅拌均匀。如果没有搅拌均匀，硅胶会出现干燥固化不均匀和硅胶产品硬度不一致的状况，从而影响硅胶的质量，甚至造成硅胶产品报废的状况。 （4）抽真空排气泡处理 硅胶与固化剂搅拌均匀后，放冰箱冻１０分钟左右进行抽真空排气泡环节，抽真空的时间不宜太久，正常情况下，不要超过三十分钟，每隔7～10分钟晃动一次，抽真空时间太久，硅胶会逐渐固化，产生交联反应，使硅胶变成一块块的，无法进行涂刷或灌注，造成硅胶浪费。 （5）硅胶的注塑加工 将抽完真空的硅胶倒入压胶罐内后，需放在冰箱内冷冻处理十分钟，再用千斤顶将其压入模具内。压胶时需要注意压胶速度的控制，压胶速度要均匀且要缓慢，确保模具内空气完全被排出，成型胶粒内无气泡，若有气泡需要对模具进行补压，直至无气泡为止。！ （6）硅胶的烘烤成型 硅胶成功注入模具内后，要想快速得到硅胶产品，应将硅胶模具放入60°烤箱，加快硅胶的成型速度！在此温度下将硅胶模具烘烤90分钟。因

《大学英语》第二次作业(满分)

一、单项选择题。本大题共30个小题，每小题2.5 分，共75.0分。在每小题给出的选项中，只有一项是符合题目要求的。 1. —Would you like to go skating with me? —________________. ( C ) A.Yes, I think so B.No, thanks C.Yes, I'd love to D.I'm afraid not 2. —Would you like something to drink? What about a cup of tea? —________________( A ) A.No, thanks. B.No, I wouldn't. C.Yes, I want. D.Yes, I like. 3. —Hello, may I have an appointment with the headmaster? —________________.( C ) A.Sorry, I don't know you B.No, you can't C.Certainly. Wait a minute, please D.Let me see 4. —Why not join us in the game? —________________.( A ) A.OK! I'm coming B.No, you do the same C.Oh, that's all right D.Don't mention it 5. —Could I see your ticket please? —________________( D ) A.I am not sure yet. B.I'd love one. C.I might be. Why? D.Here you are. 6. —Do you think I could borrow your dictionary this weekend? —Sorry, but ________________ ( C ) A.you can not have it right away. B.I'm sure you'll like it. C.I'm going to need it myself. D.the dictionary is just there.

2019年春季学期课程作业大学英语lxh第二次作业

正在加载试题，请稍候... 2019年春季学期课程作业大学英语（3）第2次 大学英语（3） 题号一二三四五合计 已做/题量0 / 15 0 / 3 0 / 3 0 / 5 0 / 1 0 / 27 得分/分值0 / 30 0 / 15 0 / 15 0 / 25 0 / 15 0 / 100 一、单项选择题(共15 题、0 / 30 分) 1、 ( We have a high regard for Prof. Joseph because he always____ his principles. A、lives on B、lives up to C、 lives down D、lives with : 2、 After months of voyage, Columbus arrived in ____ later proved a new continent. A、where B、which C、what , D、that 3、 Even if his letter____ tomorrow, it____ too late to do anything. A、 will arrive...is B、 should arrive...were ；

arrives...will be D、 arrives...would be 4、The trouble （）the car is that it has to be repaired every few days. A、A to { B、B for C、C in D、D with 5、 If you want to gain people’s res pect, be sure to _____ your promises. | A、live through B、live up to C、live with D、live on 6、–Hello, I’m David Chen. Nice to meet you. -- ( ) 、 A、Are you B、Nice to meet you too. C、Yes. D、Very nice. 7、 As the saying goes, all work and no play makes Jack a dull boy. So we should ____ work and play.、

2015年大学英语(三)第二次作业

问题1 得2 分，满分2 分 1、--What does your father do? -- ___________. 答案 所选答案： C. C：He is a farmer 问题2 得2 分，满分2 分 2、-- How are you today? --___________, thank you. 答案 所选答案： A：Fine 问题3 得2 分，满分2 分 3、- _______ - You too! 答案 所选答案： A：Merry Christmas! 问题4 得2 分，满分2 分 4、- Good-bye for now. - _________ 答案 所选答案： C：See you. 问题5 得2 分，满分2 分 5、--Excuse me, could you tell me how to get to the post office? -- _____________. 答案 所选答案： D：Sorry, but I am a stranger here myself

问题6 得2 分，满分2 分 6、- How do I get to the cinema? - _________ 答案 所选答案： D：Go down this street and turn left. 问题7 得2 分，满分2 分 7、- Is it possible for you to work late tonight? - _______ 答案 所选答案： D：I think so. 问题8 得2 分，满分2 分 8、-- May I use your bike for a moment? -- ________ 答案 所选答案： C：By all means. 问题9 得2 分，满分2 分 9、-- Congratulations! You won the first prize in today's speech contest. -- ________ 答案 所选答案： C：Thank you. 问题10 得2 分，满分2 分 10、- How are you, Bob? - _______ 答案 所选答案： B：I'm fine. Thank you 问题11 得2 分，满分2 分 11、-- Would you like to go to the concert with us this evening? -- ________ 答案 所选答案： B：I'd love to, but I'm busy tonight. 问题12 得2 分，满分2 分

川大2017秋冬季《大学英语(三)》第二次作业答案的

川大2017秋冬季《大学英语（三）》第二次作业答案 一、单项选择题。本大题共35个小题，每小题2.5 分，共87.5分。在每小题给出的选项中，只有一项是符合题目要求的。 1. —Can you go to the concert with us this evening? —________________ A.No, I already have plans. B.I’d love to, but I’m busy tonight.√ C.No, I really don’t like being with you. D.I’m ill, so I shouldn’t go out. 2. —Would you like to go skating with me? —________________. A.Yes, I think so B.No, thanks C.Yes, I'd love to√ D.I'm afraid not 3. —What about going for a walk? —________________. A.It’s good for you B.That’s all right C.So, do I D.Why not? A good idea√ 4. —Hello, may I have an appointment with the headmaster? —________________. A.Sorry, I don't know you B.No, you can't C.Certainly. Wait a minute, please√ D.Let me see 5. —May I use your bike for a moment? —________________. A.It’s well. B.It doesn’t matter. C.By all means.√ D.I have no idea. 6. —It’s rather cold in here. Do you mind if I close the window?

大学英语( 2 )第二次网络作业答卷纸

大学英语（2）第二次网络作业（新教材） 一、阅读： ( 1 ) A few years ago it was common to speak of a generation gap between young people and their elders. Parents said that children did not respect and listen to them, while children said that their parents did not understand them at all. What had gone wrong? Why had the generation gap suddenly appeared? Actually, the generation gap has been around for a long time. Many people argue that it is built into every part of our society. One important cause of the generation gap is the opportunity that young people have to choose their own ways of life. In a more traditional society, when children grow up, they are expected to live in the same area as their parents, to marry people that their parents know and like, and often to continue the family jobs. In our society, young people often travel great distances for their education, move out of the family at an early age, marry or live with people whom their parents have never met, and choose jobs different from those of their parents. In our society, parents often expect their children to do better than they did, to find better jobs, to make more money and to do all the things that they were unable to do. Often, that is another cause of the gap between them. Often, they discover that they have very little in common with each other. Finally, the speed at which changes take place in our society is the third cause of the gap between the generations. In a traditional culture, senior people are valued for their knowledge, but in our society the knowledge of a lifetime may

2019春大学英语三第二次在线作业

2019春大学英语三第二次在线作业单选题 (共40道题) 1.（ 2.5分）– Is it going to rain? -- _________. ?A、Thank you. ?B、I like the rain. ?C、I love sunshine. ?D、I think so. 我的答案：D 此题得分：2.5分 2.（2.5分）– what does the weather forecast say? －－___________. ?A、It says I’m fine. ?B、It says it is going to snow. ?C、It says the traffic will turn better. ?D、It says OK. 我的答案：B 此题得分：2.5分 3.（2.5分）– Excuse me, are you free tomorrow evening? --___________. ?A、You’re welcome. ?B、I’m glad to see you. ?C、It doesn’t m atter. ?D、I think so. 我的答案：D 此题得分：2.5分 4.（2.5分）– Do you enjoy your food? --___________. ?A、Thank you. ?B、I’d like a cup of tea. ?C、Yes, they’re delicious.

?D、OK. 我的答案：C 此题得分：2.5分 5.（2.5分）– What can I do for you? --__________. ?A、Hello. ?B、I want to buy this book. ?C、Thank you. ?D、Nice to meet you. 我的答案：B 此题得分：2.5分 6.（2.5分） Iron expands when____ . ?A、heat ?B、hot ?C、heated ?D、is hot 我的答案：C 此题得分：2.5分 7.（2.5分）— What did you think of Bellow’s new book? — I enjoyed ________ it. ?A、to read ?B、reading ?C、to have read ?D、the reading of 我的答案：B 此题得分：2.5分 8.（2.5分）—May I help you with some shoes, sir? — Yes. I’ d lik e to try on those brown __________. ?A、one ?B、ones ?C、two ?D、pair

《大学英语(三)》第二次作业答案2017

你的得分：90.0 完成日期：2017年02月5日 17点34分 说明：每道小题选项旁的标识是标准答案。 一、单项选择题。本大题共35个小题，每小题 2.5 分，共87.5分。在每小题给出的选项中，只有一项是符合题目要求的。 1. o—Can you go to the concert with us this evening? o—________________ C.No, I already have plans. D.I’d love to, but I’m busy tonight. E.No, I really don’t like being with you. F.I’m ill, so I shouldn’t go out. o—Would you like to go skating with me? o—________________. B.Yes, I think so C.No, thanks D.Yes, I'd love to E.I'm afraid not o—What about going for a walk? o—________________. B.It’s good for you C.That’s all right D.So, do I E.Why not? A good idea o—Hello, may I have an appointment with the headmaster? o—________________. B.Sorry, I don't know you C.No, you can't D.Certainly. Wait a minute, please E.Let me see o—May I use your bike for a moment? o—________________. B.It’s well. C.It doesn’t matter. D.By all means.

四川大学2015《大学英语二》第二次作业

你的得分： 100.0 完成日期：2016年08月13日 11点47分 说明：每道小题选项旁的标识是标准答案。 一、单项选择题。本大题共40个小题，每小题 2.5 分，共100.0分。在每小题给出的选项中，只有一项是符合题目要求的。 1.—What a poor job I’ve done! —__D __ A.Do it again. B.You can do it. C.Do your best! D.Don’t be upset. No one can do it better than you. 2.—Are you doing anything special on Friday, Bill? —____B___ —Oh, what a pity! A.No, nothing special B.Yes, I have promised to call on some friends C.Yes, of course D.No, I’m not sure. Why? 3.—I’d like to make an appointment with Mr. White. —___C____ A.Sorry, he is busy at the moment. B.Why didn’t you call earlier? C.Certainly. May I know your name? D.Sorry. He doesn’t want to see you. 4.—This is the worst film ever produced. Do you think so? —____B___ A.You’re wrong B.I don’t think so, I’m afraid C.Not at all D.No, that’s not real 5.—My dear! I made a mistake again. —____B___ A.Be careful. B.Don’t worry. We can do something to make up for it. C.What a pity! D.You should worry about it.

大学英语4第二次作业

作业二 一、单选题 1、- Would you please show me your bankbook - _________ A：Sorry, I have no idea. B：Here you are. C：Come with me. D：Yes, I'd like to. 2、-- Did you win the 100 metre race -- Yes, I did. -- Really -- _________. A：Congratulations B：Best wishes C：Good luck D：Right-I'm sorry. Bob is not in his office. -_________ A：Can you take a message for me B：Are you sure for that C：Would you like to leave a message D：Can you phone me-I haven't seen Belly for 10 years. 3、 4、- I'm sorry. I lost the key. - ________

A：Well, it's OK. B：No, it's all right. C：You are welcome. D：You are wrong. 5、- Wow! This is a marvelous room! I've never known you're so artistic. - ______ A：Great, I am very art-conscious. B：Don't mention it. C：Thanks for your compliments. D：It's fine. 6、______is the temperature today A：What B：How C：How many D：How much 7、I ______ my home work this time yesterday evening. A：were doing B：was to do C：am doing D：was doing 8、Had you come five minutes earlier, you ______ the train to Birmingham. But now you missed it. A：would catch B：would have caught C：could catch

《大学英语(一)》第二次作业答案

一、单项选择题。本大题共40个小题，每小题2.5 分，共100.0分。在每小题给出的选项中，只有一项是符合题目要求的。 1.— _______ — I failed my driving test again. A.What shall I do? B.I’m down in spirits C.What are you doing? D.What’s up? 2.— Which is your preference, tea or coffee? — _______ A.OK, thanks. B. I like both. C.Can I choose? D. I choose tea any time. 3.—You’d better have more physical exercise. — _______ A.I’d like that, but I can’t afford the time. B.That’s good. C.Really. D.Yes, I would. 4.— I'm sure Class One will win the game. —________. Let's wait and see. A.Yes, I think so B.It's hard to say C.Impossible D.That’s unlikely. 5.—Let’s go and have sports together. — _______ A.Yes, please. B.You’re welcome. C.Good idea. D.Thank you. 6.I think we should _______ these interesting old customs. A.prevent B.preserve C.reserve D.serve 7.Because there is so much unemployment, the _______ for jobs is fierce. A.chance B.contest C.pressure https://www.wendangku.net/doc/0e4771340.html,petition 8.Some words are hard to _______ because they have many different uses.

大学英语(1)第二次网络作业和答案

大学英语（1）第二次网络作业 (三次网络作业的平均成绩占期末考试成绩30%，请大家在认真复习好《大学英语》课本第一册第3-4单元的课文、词汇与短语后完成如下作业；作业一经批 改评分，将不能修改；此次作业完成后应交到“在线作业”一栏本次作业界面 中；作业必须按最后一页答卷表格格式作答，不要以附件形式缴交) 一. 阅读： （ 1 ） The angry woman stood by the station. “ The railway owes me ￡12,”she said to Harry Jenks, the booking clerk (订票员). “My ticket was for May 22nd, and there was no ship from Jersey that night. My daughter and I had to stay in a hotel. It cost me ￡12.” Harry was worried. He remembered selling the woman a return ticket. “Come into the office, madam,”he said, “ I’ll just check the Jersey timetable for May 22nd .” The woman and her little girl followed him inside. She was quite right, as Harry soon discovered. There was no sailing on May 22nd. How ever had he made such a big mistake? Wondering what to do, he smiled at the child. “You look healthy,” he said to her. “ Did you have a nice holiday in Jersey?” “Yes,”she answered. “The beach was beautiful. And I can swim too!” “ That’s fine,” said Harry. “ My little girl can’t swim a bit yet. Of course, she’s only three-----” “ I’m four,” the child said proudly. “ I’ll soon be four and a half.” Harry turned to the mother. “ I remember your ticket, madam,”he said. “But you didn’t get one for your daughter, did you?” “Er, well-----”The woman looked at the child. “I mean-----she hasn’t started school yet. She’s only four.” “A four year old child must have a ticket, madam. A child’s

二次元影像测量仪作业指导书

文件名称二次元影像仪测量仪作业指导书页次第1 页共 7页发行日期2018.01.20 编制审核批准 1、目的 1.1为规范操作员能熟练掌握仪器的使用，使操作有依可循，特制定此标准。 2、范围 2.1此标准适用于我司二次元影像仪测量仪的操作。 3、职责 3.1工程部：负责提供测试样品及样品标准； 3.2品质部：负责仪器的使用与日常保养，仪器的测试与管理。 4、设备说明

文件名称二次元影像仪测量仪作业指导书页次第2 页共 7页发行日期2018.01.20 编制审核批准 5、软件操作界面说明 6、像素校正 6.1第一次使用软件或机器进行测量时，或镜头的倍率变化后，一定要进行像素校正。像素校 正的目的是为了让测量结果更准确。 6.2像素校正必须符合以下条件： 6.2.1镜头的倍率不变; 6.2.2必须使用圆测量工具 6.2.3校正的顺序必须是：沿影像区的四个角落，顺时针或逆时针校正。 6.2.4圆不能太大，也不太小，占屏幕的 1/8 最好。 6.3像素校正的步骤如下：(校正顺序以右下－右上－左上－左下为例) 6.3.1将校正片放在工作台上，对焦清晰后，移动X,Y轴找到校正片上的某一圆，先将圆移到 画面的右下方，在影像窗口弹右键，在弹出的菜单中，选择＂像素校正＂(状态提示栏将显示：像素校正，第1次)后，然后用鼠标左键在圆的中间单击一下（如图一）。 6.3.2状态栏上会显示,”像素校正，第2步”，移动Y轴，将此圆移到影像区的右上方（如图 二），然后用鼠标右键在圆的中间单击一下，完成测量.

文件名称二次元影像仪测量仪作业指导书页次第3 页共 7页发行日期2018.01.20 编制审核批准 6.3.3状态栏上会显示,”像素校正，第3步”，移动X轴，将此圆移到影像区的左上方（如图 三），然后用鼠标右键在圆的中间单击一下,完成测量。 6.3.3状态栏上会显示,”像素校正，第4步”，移动Y轴，将此圆移到影像区的左下方（如图 四），然后用鼠标右键在圆的中间单击一下，完成测量。 图一图二 图三图四 6.3.4此时，会弹出如下对话框，保存像素校正的数据。