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 钻石切工等级写着proprtions是什么意思

2023-08-10 10:27:25
TAG: ro ti rt ion io pro ons
共1条回复
大鱼炖火锅

proportions不是钻石的切工等级,是这颗钻石切工的各个面的数值相对于平均直径的百分比,任何一颗钻石鉴定证书都会出现这个术语,这个单词下面的数据是对这颗钻石切工的专业评判

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Lesson 8 - 抽样分布与中心极限定理

请注意我们本来要找的是什么,我们要找的是 特定样本在样本均值分布的什么位置 ,不仅仅针对是这个简单的总体更是针对庞大的总体。 现在可以找到了因为现在我们知道对于均值分布,其中 每个均值都是样本量为 n 的均值 ,该分布的标准偏差就等于总体标准偏差除以平方根 n,这就叫做 中心极限定理 。 它不仅适用于这些简单的总体,更是适用于任何总体。 正是因为中心极限定理,我们的总体可以是任何形状 。 假设我们从中抽取一个样本并计算出均值,然后再抽取出一个样本并计算出均值,持续这么操作。 如果 画出均值分布图的话,形状会是相对正态的 ,其中标准偏差等于总体标准偏差除以样本量的平方根我们一直都叫它 SE In this section, we learned about how Inferential Statistics differs from Descriptive Statistics . Descriptive statistics is about describing our collected data . Inferential Statistics is about using our collected data to draw conclusions to a larger population . We looked at specific examples that allowed us to identify the In this section, we learned about how Inferential Statistics differs from Descriptive Statistics. Descriptive statistics is about describing our collected data using the measures discussed throughout this lesson: measures of center, measures of spread, shape of our distribution, and outliers. We can also use plots of our data to gain a better understanding. Inferential Statistics is about using our collected data to draw conclusions to a larger population . Performing inferential statistics well requires that we take a sample that accurately represents our population of interest. A common way to collect data is via a survey. However, surveys may be extremely biased depending on the types of questions that are asked, and the way the questions are asked. This is a topic you should think about when tackling the the first project. We looked at specific examples that allowed us to identify the We have already learned some really valuable ideas about sampling distributions: First, we have defined sampling distributions as the distribution of a statistic. This is fundamental - I cannot stress the importance of this idea. We simulated the creation of sampling distributions in the previous ipython notebook for samples of size 5 and size 20, which is something you will do more than once in the upcoming concepts and lessons. 选择不同的组合统计量会不相同 如果选择所有的组合将会出现下面的结果 如果将不同的组合产生的统计量进行绘图可得 以上的分布就为抽样分布 Second, we found out some interesting ideas about sampling distributions that will be iterated later in this lesson as well. We found that for proportions (and also means, as proportions are just the mean of 1 and 0 values), the following characteristics hold. 练习 The rest of this lesson will reinforce some of these ideas that you saw at work in this notebook, but you are already being introduced to some big ideas that will continue to show up again and again. As you saw in this video, we commonly use Greek symbols as parameters and lowercase letters as the corresponding statistics. Sometimes in the literature, you might also see the same Greek symbols with a "hat" to represent that this is an estimate of the corresponding parameter. Below is a table that provides some of the most common parameters and corresponding statistics, as shown in the video. Remember that all parameters pertain to a population, while all statistics pertain to a sample. 总体参数不会因样本的不同发生变化, 只有统计量会因样本的不同而不同. Two important mathematical theorems for working with sampling distributions include: The Law of Large Numbers says that as our sample size increases, the sample mean gets closer to the population mean , but how did we determine that the sample mean would estimate a population mean in the first place? How would we identify another relationship between parameter and statistic like this in the future? Three of the most common ways are with the following estimation techniques: Though these are beyond the scope of what is covered in this course, these are techniques that should be well understood for Data Scientist"s that may need to understand how to estimate some value that isn"t as common as a mean or variance. Using one of these methods to determine a "best estimate", would be a necessity. The Central Limit Theorem states that with a large enough sample size the sampling distribution of the mean will be normally distributed. The Central Limit Theorem actually applies for these well known statistics: And it applies for additional statistics, but it doesn"t apply for all statistics! . You will see more on this towards the end of this lesson. In the previous example, you saw how the Central Limit Theorem applies to the sample mean of 100 draws from a right-skewed distribution. However, it did not apply to a sample size of 3 draws from this same distribution.( 并不适用所有的抽样分布) 适用于: 不适用于: In the next concepts, you will see that the with large sample sizes the sampling distribution of certain statistics will never become normally distributed. So how do we know which statistics will follow normal distributions, and which will not? So, you might be wondering already why is the Central Limit Theorem such a big deal? In our new age of computers, it probably isn"t as big of a deal, but more on this coming up soon! Bootstrapping is sampling with replacement.(已放回方式进行抽样, 也就是说被抽取的个体有可能在下一次接着被抽到, 也有可能被一直抽到, 但是这个可能性非常小)Using random.choice in python actually samples in this way. Where the probability of any number in our set stays the same regardless of how many times it has been chosen. Flipping a coin and rolling a die are kind of like bootstrap sampling as well, as rolling a 6 in one scenario doesn"t mean that 6 is less likely later. 在推论统计学中, 使用统计量去推断总体参数, 假设我们让样本当作一个总体, 上图中的21个杯子, 虽然只有总体的一个样本, 但是假设它们是总体, 可以从中对其进行自助抽样, 在一个样本和另一个样本之间, 喝咖啡的人之间比例有什么变化. 从上图中可以看出, 两次的均值不同, 因为第二次虽然还是21个样本数, 但是每一个个体都是从新从原始的21个个体中抽取. You actually have been bootstrapping to create sampling distributions in earlier parts of this lesson, but this can be extended to a bigger idea. It turns out, we can do a pretty good job of finding out where a parameter is by using a sampling distribution created from bootstrapping from only a sample. This will be covered in depth in the next lessons. Three of the most common ways are with the following estimation techniques for finding "good statistics" are as shown previously: Though these are beyond the scope of what is covered in this course, these are techniques that should be well understood for data scientists who may need to understand how to estimate some value that isn"t as common as a mean or variance. Using one of these methods to determine a "best estimate" would be a necessity. Two helpful links: In this lesson, you have learned a ton! You learned: Sampling Distributions In this lesson you gained the fundamental ideas that will help you with the next two lessons by learning about sampling distributions and bootstrapping. These are going provide the basis for confidence intervals and hypothesis testing in the next two lessons.
2023-08-07 07:20:471

没关系英语怎么读谐音

没关系英语谐音单词读noproblem。 没关系的英文有Itdoesn"tmatter。It"snothing。That"sallright。Nevermind。 Itdoesn"tmatter。是没关系无所谓随便的意思。 “DidIwakeyou?”“Yes,butitdoesn"tmatter。”“我把你吵醒了?”“是的,不过没关系。” nevermind用于安慰,没关系,不用担心的意思。Nevermind,Iwon"ttellonyou。别担心,我不会告发你。
2023-08-07 07:12:141

快递ups 和usps 的区别?

UPS是美国联合包裹服务公司,是国际快递,类似的还有DHL/FEDEX/TNT,这四家是全球最大的四个国际快递公司。而且基本上都是空运,速度非常快,价格也很昂贵。USPS是 United States Postal Service 美国国家邮政,这是邮政公司,类似中国的China Post 中国邮政。而且一般USPS和中国邮政都是万国邮联UPU的成员国,包裹从中国寄到美国,一般都是中国段由中国邮政送,美国段由美国邮政送。相对UPS等快递而言,速度慢很多,经常要一个月才能送到,但价格相对便宜。本问题由国际包裹查询trackingmore管理人员为你解答。
2023-08-07 07:12:181

电焊机的原理

答:我邮箱heyong37@163.com 注明 电焊机原理 我给你电子版。
2023-08-07 07:12:208

没关系用英文怎么说

补充一个:it doesn"t matter
2023-08-07 07:12:247

英语短语

1、fail exams 考试不及格2、play the instruments 弹奏乐器3、make a deal/treaty with sb. 与某人达成协议(个人觉得make an agreement with sb.更好,可是它的冠词是a,不是an )4、get into the habit of 养成……的习惯5、be able to do 能做某事6、instead of 而不是7、last word 最终决定,最后一句话8、come by 拜访(某人的家)9、try out 试用10、cut sth. out 把某物删除11、no longer/more 不再12、be angry with sb.生某人的气/对某人发火13、at least 至少;起码14、pay the bill 付款;买单15、pocket/pin money 零花钱16、next time 下次17、on one"s way home 在某人回家的路上
2023-08-07 07:12:281

山东在地图哪里

东部沿海地区。根据地图网资料显示,山东省位于中国地图的东部沿海地区,在“大公鸡”的脖颈偏下位置,山东半岛在地图上突出较为明显。 山东省(Shandong),简称“鲁”,别称“齐鲁”,中华人民共和国省级行政区,省会济南。
2023-08-07 07:12:301

PLC控制系统是什么?

PLC就相当于机器的大脑,我们编的程序就相当于人所撑握的知识与规则。机器就相当于人的躯体,用来执行PLC的各种动作。电,气,液等就相当于人的肌肉与神经,PLC发出指令,通过电,气,液等将能量传给机器,机器就执行。传感器将外界情况反馈给PLC,就相当于人的眼,鼻等,将外界事物反馈给大脑。也就是说拿一个人或者动物来打比方,PLC就是大脑,PLC跟机器的结合就相当于人的大脑跟躯体的结合,,只是人的大脑里面的程序比PLC要复杂得多,但是人的大脑的灵敏度及准确性不及PLC。
2023-08-07 07:12:333

常用英语短语

常用英语短语如下:1、be accustomed to… 习惯于…2、be composed of… 由…组成3、on the basis of… 根据…,在…的基础上4、in any case 无论如何,总之5、in case of… 假使…,万一…6、in no case 决不7、make sense 讲得通,有意义8、a great/good deal of… 大量…9、influence on… 影响…10、reply to… 回答…,答复…11、once upon a time 从前12、once in a while 偶尔,有时13、refer to… 参考…,查阅…,涉及…,提到…14、depend on… 取决于…15、devote to… 奉献…,致力于…16、insist on… 坚持…17、look forward to… 盼望…,期待…18、have something to do with… 和…有点关系
2023-08-07 07:12:381

山东省地图的内容简介

山东东临海洋,西靠大陆。水平地形分为半岛和大陆两部分。东部的山东半岛突出于黄海、渤海之间,隔渤海海峡与辽东半岛遥遥相对。庙岛群岛屹立在渤海海峡,是渤海与黄海的分界处,扼海峡咽喉,成为拱卫首都北京的重要海防门户。西部大陆部分自北向南依次与河北、河南、安徽、江苏4省接壤。山东省城市地图十七地市、
2023-08-07 07:12:381

与我无关英文怎么说

It "s non of my businesse
2023-08-07 07:12:484

山东有哪些靠海的城市?

山东省那些靠海的城市:滨州、烟台、青岛、威海、日照、东营等。也有城市部分县区靠海近。县区不说了。山东省那部分地区靠海:一、鲁东地区、鲁北地区、鲁东北地区、鲁东南地区。四个方向都靠海。二、内陆地区:鲁西地区、鲁西南地区、鲁西北地区、鲁西南地区是内陆城市。
2023-08-07 07:12:545

口腔助理医师报名流程

口腔助理医一个业的医学职称,报名参口腔助理医师考试需要按照骤进行:1. 确定资格要求:首先,确认是否符合口腔助理医师考试的格要求,这可能包相关学历及专背景的求口腔学相关专业的学士学位或以上学历。.申材料:根据口腔助理医师考试要求,备所需请料常括内容:个人身份证明文件(如份证或护等)- 学历证明文件(如学证书历学位认证报告等)-专业背景证明文件(如执业医师证书或相关业格证等)- 照片(一般要求近期免冠彩色照片)3.写报名表:填写口腔医师试的报名表,提供个人基本信息相关资料,确保准确无误。4. 缴纳名费:根据相关规定纳口腔助理医师考试的报名费,一般在报名截止完成缴费。5 提交申:将填完并附有必需请材料的申请表,连同缴纳的报名费并提交给相关的考试管理机构委员会,一般可以在线申请、邮递或亲自递交进行。6. 确认报名信息:确认提交申请后,保留相关的报名、收或确认函,以备日后查询使用。注意的是,具的报名流程和要求会有所差异,具体的信息应当考考试机构或医学教育部门发布的方通指南。
2023-08-07 07:12:582

英语短语

   英语短语   1. a bit有一点儿;一会儿   2. a bit of有一点儿   3. a bottle of 一瓶   4. a cup of 一(茶)杯   5. a glass of 一(玻璃)杯   6. a few 一些,少数几个   7. again and again再三地,反复地   8. after all 毕竟,终究   9. after a while 过了一会儿   10. after school 放学后   11. agree on 同意,赞成   12. agree to do sth 同意做某事   13. agree with (sb) 与某人意见一致   14. a group of 一群   15. a kind of 一种   16. a little 一点,少量   17. a lot of 许多,大量   18. a lot 许多,大量   19. a moment ago 刚才   20. a moment later 片刻之后   21. a place of interest 名胜   22. and so on 等等   23. across from 在u2026u2026对面   24. a list of u2026...的清单   25. a pair of 一双   26. a quarter past/tou2026 u2026..点过一刻/差一刻到u2026..点   27. a roll of film 一卷胶卷   28. a shop assistant 售货员;店员   29. a top speed of 50 kilometres per hour 每小时50千米的高   30. a number of若干的;许多的   31. a set number of固定数量的;一定数量   32. all by oneself独自地,全靠自己   33. all day整天;一天到晚   34. all kinds of 各种各样的   35. all oneu2019s life一生;终生   36. all over遍及,到处,结束   37. all over the world全世界   38. all right行了;好吧;(病)好了   39. all the same都一样,仍然   40. all the time一直,始终;老是   41. all year round一年到头   42. an hour or two一两个小时   43. answer the telephone接电话   44. answer tou2026u2026的答案   45. anything else 别的东西(事情)   46. arrive at/in+地方名词 到达某地   47. asu2026as像。。。。。。一样   48. asu2026as one can尽量   49. as if 好像   50. as long as 只要   51. as soon as一。。。。。。就。。。。。。   52. as soon as possible尽快,尽可能早地   53. as usual像往常一样   54. as well as也,又   55. ask for要求(做)某事   56. ask sb. to do sth. 要求某人做某事   57. at breakfast早餐时   58. at firt起先,开始的时候   59. at home在家   60. at last最后,终于   61. at least至少;起码   62. at midnight 在半夜   63. at night在夜里   64. at noon在正午   65. at once马上   66. at school在学校(上课)   67. at sea 在海上   68. at the beginning of在。。。。。。开始时   69. at the cinema看电影   70. at the age of在。。。。。。岁的时候   71. at the door在门口   72. at the edge of在u2026u2026边缘   73. at the end of在u2026u2026的结尾   74. at front of在u2026u2026(外部的)前面   75. at the front of在u2026u2026(内部的)前面   76. at the foot of在u2026u2026脚下   77. at the head of在u2026u2026的前面;在u2026u2026的排头/前面   78. at the top of在u2026u2026顶上/部   79. at the very top 在最顶层   80. at the moment此刻;正在那时   81. at that moment正在那时   82. at the same time同时   83. at the starting line在起跑线处/上   84. at this time of the year在一年中这时候   85. at times偶尔;有时,时常   86. at work在工作   87. around the world世界各地   88. bad luck.不幸,倒霉   89. bad manners 没礼貌;坏习惯   90. be abroad 出国,在国外   91. be back home回到家   92. be able to do sth.能够做某事   93. be unable to do sth不能做某事   94. be after追求,想得到   95. be alone独自,单独   96. be amazed at 对u2026u2026感到惊讶   97. be angry with sb.生某人的气   98. be anxious about担心,焦虑   99. be asleep睡着   100. be awake 醒着的   101. be away离开   102. be away from远离u2026u2026   103. be away from home离家在外   104. be bad for对u2026u2026有害   105. be badly hurt伤得很重   106. be born in/on 出生于u2026u2026   107. be busy doing sth忙于做某事   108. be busy with sth. 忙于某事   109. be careful小心   110. be covered with被u2026u2026覆盖着   111. because of由于   112. be confident of对u2026u2026有信心   113. be excited 兴奋;激动   114. be different from与u2026u2026不同   115. be easy to do sth做某事容易.   116. be famous as作为u2026u2026而出名   117. be famous for因u2026u2026而出名   118. be fed up with 厌倦   119. be filled with充满   120. be free免费,自由,空闲   121. be friendly to sb对某人友好.   122. be friends with 与u2026u2026交朋友   123. be from来自于   124. be full of充满着   125. beg oneu2019s pardon 请原谅;对不起   126. be going to do sth 打算(计划)做某事   127. be good at善于,擅长u2026u2026   128. be good for 对u2026u2026有益   129. be happy to do sth乐于做某事.   130. be hard to do sth.做某事难   131. be helpful有帮助   132. (be)in bed 在床上,在睡觉   133. be in hospital(生病)住院   134. be/become interested in对u2026u2026感兴趣   135. be in trouble处于困难之中   136. be joined to 接近;连接   137. Beijing Opera 京剧   138. before long 不久以后   139. be kind to sb对u2026u2026友好.   140. belong to属于   141. be late for 迟到   142. be less/more trouble 麻烦少/多   143. be like像u2026u2026   144. be located in/on座落于;位于   145. be lost迷路;丢失   146. be mad at 生u2026u2026的气   147. be made of/from用u2026u2026制成的   148. be made in由u2026u2026制造   149. be nice of sb 某人真好   150. be nice to 对u2026u2026好   151. be off 离开   152. be out 不在,外出   153. be over结束;在u2026u2026上方;超过   154. be pleased满意   155. be proud of 为u2026u2026而自豪/骄傲   156. be quiet安静   157. (be)related to和u2026u2026有关系,涉及   158. be/get ready for sth 为u2026u2026准备   159. be/get ready to do sth 准备好做某事   160. be saved获救   161. be sick 生病   162. be scared of 害怕   163. be sorry遗憾;后悔,难过   164. be strict with对u2026u2026要求严格   165. be sure (of)肯定u2026u2026   166. be talented at 在u2026u2026有特长   167. be the opposite 恰恰相反   168. be weak in 在u2026u2026(方面)弱   169. be welcome 受欢迎,不用谢   170. be worn out 筋疲力尽   171. be worried about 为u2026u2026担心   172. be well-known for 因u2026u2026而著名   173. begin school 开学   174. begin to do sth.. 开始(着手)做某事   175. begin with 以u2026u2026开始   176. believe in(sb.) 相信(某人)   177. betweenu2026andu2026 在u2026u2026和u2026u2026之间   178. blow away (风)刮走,吹走   179. blow out 吹灭   180. body language 手势语   181. borrowu2026fromu2026 从u2026u2026借来u2026u2026   182. bothu2026andu2026 既u2026u2026又u2026u2026 , u2026u2026和u2026u2026   183. break down (机械)损坏;拆散(某物)   184. break a world record 打破一项世界纪录   185. break into 潜入;闯入   186. break into pieces (使)成为碎片   187. bring back 归还;使u2026u2026想起   188. bringu2026tou2026 把u2026u2026带给u2026u2026 ;给u2026u2026带来u2026u2026   189. bring up 养育   190. brush oneu2019s teeth 刷牙   191. by air/bike/bus/car乘飞机/骑自行车/ 乘公共汽车/坐汽车   192. by plane/boat/train/ship乘飞机/坐船/ 乘火车/乘轮船   193. by land/sea 由陆路/由水路   194. by hand 手工   195. by oneself 独自   196. by the end of 到u2026u2026时为止   197. by the side of 在u2026u2026旁边   198. by the time 到u2026u2026时候   199. by the way 顺便说   200. by then 到那时
2023-08-07 07:13:051

电焊机的原理是什么?

电焊机就是一个特殊的变压器。所不同的是变压器接负载时电压下降小,电焊机接负载时电压下降大.这主要是通过调解磁通和串联电感的电感量来实现的,普通电焊机的工作原理和变压器相似,是一个降压变压器。在次级线圈的两端是被焊接工件和焊条,引燃电弧,在电弧的高温中将工件的缝隙和焊条熔接。电焊变压器有自身的特点,就是具有电压急剧下降的特性。在焊条引燃后电压下降;在焊条被粘连短路时,电压也是急剧下降。这种现象产生的原因,是电焊变压器的铁芯特性产生的。电焊机的工作电压的调节,除了一次的220/380电压变换,二次线圈也有抽头变换电压,同时还有用铁芯来调节的,可调铁芯的进入多少,就分流磁路,进入越多,焊接电压越低。虽然电路是闭合的,可正是因为电路是闭合的才使得在整个闭合电路和电流处处相等;但各处的电阻可是不一样的,特别是在不固定接触处的电阻最大,这个电阻在物理中叫接触电阻。根据电流的热效应定律(也叫焦尔定律),q=i2rt可知,电流相等,则电阻越大的部位发热越高,电焊在焊接时焊条的触头也被接的金属体的接触处的接触电阻最大,则在这个部位产生的电热自然也就最多,焊条又是熔点较低的合金,自然的容易熔化了,熔化后的合金焊条芯沾合在被焊物体上后经过冷却,就把焊接对象粘合在一块了。此时,由于焊条提起的瞬间上述间隙极小,焊条和焊件之间的电压又较高(60--70v),再加上述预热使焊条端点和焊件被焊处容易发射电子,结果间隙处的空气被击穿而导电,同时产生耀眼的火花,这就是弧光放电。弧光放电处的温度能达到2000k以上,焊条和焊件被溶化,从而实现了焊接。弧光放电开始后,焊条端点和焊件的电压降(简称电弧电压)为约为30v,电弧形成的负载是电阻性负载。
2023-08-07 07:12:092

什么是plc控制系统?

1.PLC是电力线通信,使用模块化信号在已经用于电力传输的导体上提供宽带数据通信。2.PLC技术的使用包括发送无线电节目,公用事业公司控制切换机制,传输线路保护和自动抄表。3.还有一些汽车用途,其中数据,语音和音乐通过直流(DC)电池电源线发送,带有特殊滤波器以滤除线路噪声。4.可编程逻辑控制器,它采用一类可编程的存储器,用于其内部存储程序,执行逻辑运算、顺序控制、定时、计数和算术操作等面向用户的指令,并通过数字或模拟式输入/输出控制各种类型的机械或生产过程。
2023-08-07 07:12:032

没关系英语怎么写

  没关系:1礼貌用语,事物的非关联性。不要紧,不值得顾虑;回应别人的道歉时所说的礼貌用语表示不介意。2、关系的否定形式。 没有人脉关系,没有联系。那么,你知道没关系的英文怎么写吗?   没关系的英文释义:   It doesn"t matter.   Never mind.   That"s OK.   it"s all right   没关系的英文例句:   这鞋刚穿时要是有点紧没关系,这种皮子很有延展性。   Don"t worry if the shoes seem a bit tight at first; the leather has plenty of give in it.   没关系。有什么事?   It doesn"t matter. What"s up?   价格没关系。   It doesn"t matter about the price.   是的,每个人都喜欢丑闻,就算你不喜欢最新的也没关系。   What could be more amusing than the publicexposure of hypocritical sinners? 没关系英语怎么写   金属锅柄的也没关系,一样可以放在炉子上炖。   One with a metal handle can also be set in the oven.   只要你高兴做点让步没关系。   What are the odds so long as you are happy.   你穿得怎样并没关系。   It does not matter how you are dressed.   义演中我们没有流行明星也没关系。   It does not matter that we do not have pop stars in our show.   他说没关系,他说我会把你拉住   He comforted me not to worry and he would drag me back from the death.   管他想什么, 都没关系。   Whatever he thinks doesn"t matter.   我们现在是这样的,没关系,但是不要增加武器的数量。   What we have now, thatu2019s all right, but letu2019s not increase the number of arms.   不过这些都没关系,因为她走起路来趾高气扬,好像我们所有人加在一起都不如她似的。   Not that mattered though, because she walked around like she was better than allof us put together.   即使你犯了错也没关系,只要你可以将其归责于一个权威的信息源,指出它也错了就行。   Itu2019s okay to be wrong, as long as you can blame it on an authoritative source that is also wrong.   不要担心如果自己忘记了单词或看不懂外文或是不能脱口而出该怎么办,这没关系,你正在学习和进步之中。   Do not worry about what you cannot remember, or cannot yet understand, orcannot yet say. It does not matter. You are learning and improving.   如果你的孩子开始阅读一本书而不想继续看完它--没关系。   If your child starts a book and doesn"t want to finish it -- ok.   如果你不能弄清楚如何提高性能的同时向外扩展,没关系。   If you canu2019t figure out how to improve performance while scaling out, its okay.   如果你的孩子开始阅读一本书而不想继续看完它--没关系。你以前不也这样做过吗?   If your child starts a book and doesn"t want to finish it -- ok. Hasn"t that happenedto you?   没关系的意思是,她需要做长时间的深入思考,然后决定怎样及何时让你为你的错误付出代价。   Thatu2019s okay means she wants to think long and hard before deciding how andwhen you will pay for your mistake.   但是没关系,因为生活就是在成长。   But thatu2019s okay, because life is about growth.   这一切暗示我们:睡眠受到干忧没关系,而做梦受到干忧是有问题的。   The implications of all this were that it was not the disturbance of sleep thatmattered,but the disturbance of dreaming.   就在我因为失败的压力消沉的时候,一个个头矮小的人把手放在我的肩头上,直视着我的眼睛,用他沙哑但奇妙的声音说道:“没关系。   As I slumped under the weight of my defeat, a small man put his hand on myshoulder, looked me in the eye, and said in that wonderful raspy voice, Thatu2019s all right.   没关系-像你这样有见识的女孩子不会反对这次旅行的。   No matter-a girl of your sense will not object to the voyages.   他的妻子安慰他:"没关系!   His wife comforted him, "Never mind!   后来,学校就把我们每个人都分配在生产线上工作--这和我们的专业完全没关系。   The school then arranged work for everyone on the production line - it didn"t matter what our major was.   即使他们从乡村来,即使他们从流行音乐来,对我来讲都没关系。   If they come from Country, if they come from pop, it doesn"t matter to me.   但是不管发生什么事,只要我们在一起就没关系。   But whatever happens, we"ll be okay because we"re together.   不幸的是,在这种非正规的、责任不明的委托相应的工作没有完成或搞砸的时候,委拖者总是说“没关系”,然后他们就只好自己搞定了。   Unfortunately this informal, negative delegation is often reinforced by co-workers who simply say, "Never mind," when the requested work is not completed, orworse yet, they do the work themselves.   但是没关系,我喜欢播种草莓,也喜欢小鸟。   But itu2019s oku2026 I like the plantingu2026 and the birds.   弄清楚你究竟想要什么。这确实需要花费一些时间去思考,但是没关系。   Be clear on what you want. This will take some time to sort though and that"s okay.
2023-08-07 07:12:011

电焊机的工作原理是怎么样的?

1、电焊的原理:1.1、电焊原理是在闭合电路中,电流在电阻大的地方放电,放电产生的高温熔化金属形成熔池,融化的金属相互渗透完成融化焊接的。1.2、在实际焊接中,工件和焊条接电源接不同电极,焊条与工件瞬间接触使空气电离产生电弧,电弧的温度可达约5000-6000K,使工件表面熔化形成熔池,焊条金属熔化后与融化的母材混合填充在焊缝之中,使工件表面形成冶金焊缝。1.3、在焊接过程中,电焊条的外层的药皮对焊缝金属起了非常大的保护作用。2、电焊机输出回路的接线:2.1、交流电焊机用于输出焊接电流的次级线圈,电流大、电压低。输出电压是交流电50—80V左右。次级绕组最后引出两个接线端子,这两个接线端子没有接地线之说,随便个接线端子叫接地都行。只要是电焊把线与那条叫接地的线形成闭合环路,就可以进行电焊焊接。这也是那条接地线起的作用。
2023-08-07 07:11:592

100个英语短语

1. a big headache令人头痛的事情2. a fraction of 一部分3. a matter of concern 焦点4. a series of 一系列,一连串5. absent from不在,缺席6. abundant in富于7. account for 解释8. accuse sb. of sth.控告9. add to增加(add up to)10. after all 毕竟,究竟11. agree with同意12. ahead of time / schedule提前13. ahead of 在...之前(ahead of time 提前)14. alien to与...相反15. all at once 突然,同时16. all but 几乎;除了...都17. all of a sudden 突然18. all over again 再一次,重新19. all over 遍及20. all right 令人满意的;可以21. all the same 仍然,照样的22. all the time 一直,始终23. angry with sb. at/about sth.生气,愤怒24. anxious about/for忧虑,担心25. anything but 根本不26. apart from 除...外(有/无)27. appeal to 吸引,申诉,请求28. applicable to适用于29. apply to适用30. appropriate for/to适当,合适31. approximate to近似,接近32. apt at聪明,善于33. apt to易于34. around the clock夜以继日35. as a matter of fact 实际上36. as a result(of) 因此,由于37. as a rule 通常,照例38. as far as ...be concerned 就...而言39. as far as 远至,到...程度40. as follows 如下41. as for 至于,关于42. as good as 和...几乎一样43. as if 好像,防腐44. as regards 关于,至于45. as to 至于,关于46. as usual 像平常一样,照例47. as well as 除...外(也),即...又48. as well 同样,也,还49. ashamed of 羞愧,害臊50. aside from 除...外(还有)51. ask for the moon异想天开52. at a loss 茫然,不知所措53. at a time 一次,每次54. at all costs 不惜一切代价55. at all events 不管怎样,无论如何56. at all times 随时,总是57. at all 丝毫(不),一点也不58. at any rate 无论如何,至少59. at best 充其量,至多60. at first sight 乍一看,初看起来61. at first 最初,起先62. at hand 在手边,在附近63. at heart 内心里,本质上64. at home 在家,在国内65. at intervals 不时,每隔...66. at large 大多数,未被捕获的67. at last 终于68. at least 至少69. at length 最终,终于70. at most 至多,不超过71. at no time 从不,决不72. at one time 曾经,一度;同时73. at present 目前,现在74. at someone"s disposal 任...处理75. at the cost of 以...为代价76. at the mercy of 任凭...摆布77. at the moment 此刻,目前78. at this rate 照此速度79. at times 有时,间或80. aware of意识到81. back and forth 来回地,反复地82. back of 在...后面83. back up后备,支援84. bare of几乎没有,缺乏85. be able to do能够86. be around差不多87. be available to sb.可用,可供88. be bound to一定89. be capable of doing能够90. be concerned with 关心…,涉足…91. be dying to渴望92. be fed up with受够了be tired of93. be in hospital 住院94. be in season 上市的/in peak season旺季95. be in the mood to do sth. 想做96. be pressed for time时间不够97. be tied up with忙于98. be under the weather 身体不好99. beat around the bush 拐弯没角100. beat the crowd 避开人群
2023-08-07 07:11:591

中国邮政UPU代码是什么意思?

UPU是万国邮政联盟的简称。中国邮政UPU代码我猜意思是,万国邮政联盟分配给中国邮政的代码。
2023-08-07 07:11:571

什么是plc控制系统?

PLC就相当于机器的大脑,我们编的程序就相当于人所撑握的知识与规则。机器就相当于人的躯体,用来执行PLC的各种动作。电,气,液等就相当于人的肌肉与神经,PLC发出指令,通过电,气,液等将能量传给机器,机器就执行。传感器将外界情况反馈给PLC,就相当于人的眼,鼻等,将外界事物反馈给大脑。也就是说拿一个人或者动物来打比方,PLC就是大脑,PLC跟机器的结合就相当于人的大脑跟躯体的结合,,只是人的大脑里面的程序比PLC要复杂得多,但是人的大脑的灵敏度及准确性不及PLC。
2023-08-07 07:11:533

英语短语分类

1.每个外语句子都是由一定结构组成的。譬如1主谓;2主谓宾;3主谓宾+宾补。至于哪些单词可以做句子的成分,则是由单词的词性决定,有的单词本身就有多种词性,如welcome可做1感叹词2名词3形容词4动词等,有了这些词性,它的用法就非常灵活了。如:既然可作动词,那必然可作谓语;有了名词词性,必然可作主语,宾语,表语,以及宾补等句子成分。2.英语短语分类其实很容易分别的,我认为短语可视为:词性搭配类和句子成分类。所谓词性搭配类短语就是根据单词的词性而认定的,如你所说的“动副短语,介词短语等”;而句子成分类短语则是根据短语在句中所作的成分而定,有如你所说的“名词性短语,形容词性短语等”
2023-08-07 07:11:503

提供一份山东菏泽地图。

菏泽地图菏泽,山东省辖地级市,位于山东省西南部,鲁苏豫皖四省交界地带,东与济宁市相邻,东南与江苏省徐州市、安徽省宿州市接壤,南与河南省商丘市相连,西与河南省开封市、新乡市毗邻,北接河南省濮阳市。介于北纬34°39′—35°52′,东经114°45′—116°25′之间,属温带季风气候。辖区总面积12238.62平方公里,辖2区、7县,常住人口862.26万(2016年末)[1]。 菏泽古称曹州。夏代,分属于兖、徐、豫三州。商代,境内中部有三鬷国,定陶与曹县之间有莘国,鄄城与郓城之间有顾国、黎国。以水名称县,始于1735年,曹州升州为府,设附郭县,赐名菏泽。2000年,改菏泽地区为菏泽市(地级)。
2023-08-07 07:11:482

如何正确使用维A酸乳膏

想要有效祛班淡班,首先得学会正确选择和使用祛班产品,在祛班产品的选择上,我们应该根据自己的肤质来选择合适的产品,不过为了保险起见,也可以选择一些质地比较温和,适合任何肤质祛斑产品来使用,内调气血的方式来加快去班的功效.十大好习惯预防晒斑习惯1、防晒是去斑关键。夏天的紫外线强,祛斑产品什么好,如果不能有效防晒,深层的色素斑就会浮到真皮或表皮。这也是为什么有的人一到夏天就会长斑的原因。因此,出门前一定要做足防晒功夫,防晒油是必不可少的,在购买太阳镜和阳伞时也要主要认清UV的防晒标志。习惯2、防止毛孔阻塞,随时保持毛孔通畅,彻底实施按摩、敷面、吸除沉淀色素之祛斑护理工作。习惯3、要充分补水,每天至少要喝8杯水。多摄取维生素C含量高之美白食物及水果。习惯4、祛斑部位保持清洁,还要保证每天有充足的睡眠时间。习惯5、保持愉快的心情,缓解心理压力。习惯6、保证全面均衡的营养,避免食用色素含量高的食物、饮料,如已形成习惯,可考虑食用一些代用品,用糖果等帮助戒烟;用清香的绿茶和新鲜的小番茄来代替提神的浓郁咖啡。习惯7、不要和咖啡、茶,不要吃酱油、羊肉、牛肉、鸡肉、姜、西芹、海鲜,禁烟酒等刺激性的食物,以及酸性食物,特别注意千万不可吃发酵类的食物,以免引起过敏或发炎。如果您是过敏体质,祛斑时须向医生说明,以便医生调整使用防过敏的方式祛斑。习惯8、平时使用化妆品时,一定要避免用含铅、汞、碱、酸的护肤品,否则容易形成色素沉淀,形成颜色斑,给皮肤带来不可逆转的伤害。习惯9、如果要选用一种去斑的护肤品的话。记住一定要多自己的肌肤好一点,不要选用有刺激性的护肤品。习惯10、出门口罩手套帽子一定要备足
2023-08-07 07:11:4410

什么是plc编程控制

plc编程控制是一种数字运算操作的电子系统,专为在工业环境下应用而设计。它采用可编程序的存储器,用来在其内部存储执行逻辑运算、顺序控制、定时、计数和算术运算等操作的指令,并通过数字式、模拟式的输入和输出,控制各种类型的机械或生产过程。随着微处理器、计算机和数字通信技术的飞速发展,计算机控制已扩展到了几乎所有的工业领域。现代社会要求制造业对市场需求作出迅速的反应,生产出小批量、多品种、多规格、低成本和高质量的产品,为了满足这一要求,生产设备和自动生产线的控制系统必须具有极高的可靠性和灵活性,PLC编程正是顺应这一要求出现的,它是以微处理器为基础的通用工业控制装置。PLC是采用“顺序扫描,不断循环”的方式进行工作的。即在PLC运行时,CPU根据用户按控制要求编制好并存于用户存储器中的程序,按指令步序号(或地址号)作周期性循环扫描,如无跳转指令,则从第一条指令开始逐条顺序执行用户程序,直至程序结束,然后重新返回第一条指令,开始下一轮新的扫描,在每次扫描过程中,还要完成对输入信号的采样和对输出状态的刷新等工作。
2023-08-07 07:11:421

英语短语怎么写?

短语: [ duǎn yǔ ] 1. phrase 例句与用法: 1. 这是个形容词短语。 This is an adjective phrase. 2. very quickly indeed 是状语短语. `Very quickly indeed" is an adverbial phrase. 3. 在特定的上下文中理解一个短语的含意往往要更容易些。 It is usually easier to pick out the meaning of a phrase in a given context. 4. 赘语无意义的施沓冗长的短语或句子 A wordy phrase or sentence that has little meaning.
2023-08-07 07:11:392