1 Summary The present perfect is an important verb tense in English. It is used to talk about things that happened at unspecified times in the past. The present perfect makes a connection between the past and the present. 2 Form To form the present p…

2012.12.26 Hi all, How are you doing? Merry post-Christmas and happy upcoming New year!! I wish you had a good one this year. Our one week one time English corner is coming back! Are you excited to hear that. I know that you cannot wait to join us. Y…

Unit 11 Transport 1. Model1题目分析 Some countries attempt to solve the problem of traffic congestion by limiting the use of cars in inner city areas. What are the advantages and disadvantages of this approach to urban planning? 2.Model1范文分析 Model 1 In t…

留学生在完成英语论文作业的时候总会出现各种各样的谬误,导致最后拿不到高分,甚至挂科,最终只得选择写作完成.本文小编为大家总结出我们留学生在essay写作中几个常见谬误,希望大家有则改之,无则加勉. Essay写作谬误一.写作主题太过宏大 刚开始写作的同学经常会选一个宏大的主题(big topic)作为自己的论文主题,觉得一个宏大的主题才够高大上,才能登堂入室.其实,对于英语学术论文来说,主题越小越好,越具体越好.一篇学术文章只要能把一个小问题说清楚,就是一篇好文章.有曾经在中英文顶级期刊都发表过…

https://emerj.com/ai-sector-overviews/machine-learning-in-finance/ Machine learning has had fruitful applications in finance well before the advent of mobile banking apps, proficient chatbots, or search engines. Given the high volume, accurate histor…

本篇博客算是一个开头,接下来会持续更新使用Swift3.0开发服务端相关的博客.当然,我们使用目前使用Swift开发服务端较为成熟的框架Perfect来实现.Perfect框架是加拿大一个创业团队开发的,目前是Perfect2.0版本,关于Perfect框架,下方会详细的介绍.本篇博客会演示一个完整的Demo, 该Demo完全由Swift3.0开发,其中包括服务端和iOS客户端,数据库采用的是MySQL. 进一步说,本篇博客将会演示一个使用Swift3.0开发的记事本,当然该记事本的服务端和iO…

出现这种情况,例如:我在获取相册图片后,直接present到另一个页面,但是上一个页面可能还未dismiss,所以,要在获取相册图片的dismiss方法的complete的block里面写获取图片及跳转的方法!!!…

find your present (2) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 21948    Accepted Submission(s): 8671 Problem Description In the new year party, everybody will get a "special present"…

Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library function such as sqrt. Example 1: Input: 16 Returns: True Example 2: Input: 14 Returns: False Credits:Speci…

Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, given n = 12, return 3 because 12 = 4 + 4 + 4; given n = 13, return 2 because 13 = 4 + 9. Credits:Special thanks…