Text Our neighbour, Captain Charles Alison, will sail from Portsmouth tomorrow. We'll meet him at the harbour early in the morning. He will be in his small boat, Topsail. Topsail is a famous little boat. It has sailed across the Atlantic many times.…

Lesson 12 : GOODBYE AND GOOD LUCK New words and expressions : luck (n) 运气 例句 You're not having much luck today,are you? Good luck Tom!  Good luck + with sth Good luck with the exam 祝你考试好运 Good luck with your trip 祝你这次旅行好运 Good luck with your competit…

Lesson 12 Life on a desert island desert island ['dezət 'ailənd] n. 荒岛 uninhabited island coral island volcanic island archipelago the Indonesian archipelago peninsula the Korean peninsula paradise ['pæ rədaɪs] n. 天堂,伊甸园 heaven the Garden of Eden Haw…

1.5 模块 模块可视为扩展,通过将其导入可以扩展python的功能.python中自带有一组模块,也称为“标准库”. 1.5.1 模块的导入:import + 模块名称 • 使用关键字import导入模块 • import之后跟模块名称,可一次导入多个模块,多个模块名称之间使用逗号隔开 • 使用“模块名称.函数名称”的方式来调用该模块中的函数 >>> import random,math >>> print(random.randint(1,10)) 3 >&g…

一.w 命令 作用: 用于显示已经登录系统的用户列表, 并显示用户正在执行的指令. 执行这个命令可得知目前登入系统的用户有哪些人, 以及他们正在执行的程序.  单独执行w 命令会显示所有的用户, 您也可指定用户名称,仅显示某位用户的相关信息. 选项: -h  不打印头信息 -u  当显示当前进程和cpu 时间时忽略用户名 -s  使用短输出格式 -f  显示用户从哪登录 实例: 20:39:37 up 136 days, 3:58, 1 user, load average: 0.00, 0.0…

监控系统状态 – w, vmstat命令w, uptimesystem load averages 单位时间段内活动的进程数 查看cpu的个数和核数vmstat 1vmstat 1 10vmstat各指标含义:r :表示运行和等待cpu时间片的进程数,如果长期大于服务器cpu的个数,则说明cpu不够用了:b :表示等待资源的进程数,比如等待I/O, 内存等,这列的值如果长时间大于1,则需要关注一下了si :由交换区进入内存的数量:so :由内存进入交换区的数量:bi :从块设备读取数据的量(读磁…

这个课程的参考视频和图片来自youtube. 主要学到的知识点有: 1. Array: container that holds a fixed number of values of the same type, can be access by index. Create a string array and initialize the elements one by one. Index will be start from 0 to size -1. String[] names =…

Why is there no risk to the customer when a bank prints the customer's name on his cheques? When anyone opens a current account at a bank, he is lending the bank money, repayment of which he may demand at any time, either in cash or by drawing a cheq…

Lesson 9 A cold welcome 冷遇 What does 'a cold welcome' refer to?On Wednesday evening, we went to the Town Hall. It was the last day of the year and a large crowd of people had gathered under the Town Hall clock. It would strike twelve in twenty minute…

全文转载自 Scott Hanselman的博文. I bought a 3D printer on Friday, specifically a Printrbot Simple Metal from Amazon for US$599. I did a few days of research, looking at all the consumer models under $1000. Some were enclosed, others not. Some made of wood,…