What is the Chinese abbreviation of css?

css has many meanings: 1. Cascading style sheets, which are a computer language used to express file styles such as HTML or XML; 2. Tywei Security Group is the only company in China that positions high-end security services ; 3. The cluster switch system links several switches through dedicated cluster cables and appears to the outside world as a logical switch; 4. The content disruption system is a data encryption and decryption method that prevents video files from being copied directly from the disc. Identification method; 5. The Comprehensive Survey on China’s Social Conditions is a large-scale continuous sampling survey project across the country.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

css has many meanings, and I will introduce them one by one below.

CSS (Cascading Style Sheets)

Cascading Style Sheets (full English name: Cascading Style Sheets) is a style used to represent HTML (standard A document-style computer language such as XML (an application of Universal Markup Language) or XML (a subset of Standard Universal Markup Language). CSS can not only statically modify web pages, but can also cooperate with various scripting languages ​​to dynamically format various elements of web pages.

CSS can perform pixel-level precise control over the layout of element positions in web pages, supports almost all font size styles, and has the ability to edit web page objects and model styles.

css syntax composition

Style is the smallest syntax unit of CSS. Each style contains two parts: selector and declaration (rule), as shown in the figure below.

1. Selector (Selector)

The selector consists of the id, class attribute or element name itself of the HTML element and some Special symbols are used to specify which HTML element to define the style for. For example, the selector p means to define the style for all

tags in the page;

2. Declaration

There can be one or countless declarations. These declarations tell the browser how to render the object specified by the selector. All declarations are placed within a pair of curly braces { }, and then the entire declaration is placed immediately after the selector.

The statement must include two parts: attributes and attribute values, and use a semicolon to mark the end of a statement. The semicolon can be omitted for the last statement in a style.

• Attribute: The style name you want to set for the HTML element, consisting of a series of keywords, such as color, border, font, etc., in CSS Provides many attributes, which you can view through the W3C official website;

• Value: consists of a numerical value and a unit or keyword, used to control the display effect of a certain attribute, such as the value of the color attribute It can be red or #F1F1F1 etc.

Attributes and values ​​need to be separated by colons :. Each combination of attributes and values ​​can be regarded as a statement. Each statement They all need to end with a semicolon ;, and declarations belonging to the same selector need to be wrapped in curly braces { }.

selector {property: value;}
选择器{属性:属性值;}

[Example 1]You can define CSS styles according to the syntax rules as shown below:

Up In the syntax example of the figure:

• selector h1 means that the style should be defined for all <h1> tags in the web page;

• Attributecolor represents the font color, and the value blue represents setting the font to blue;

• Attribute text-align indicates the alignment of the text, and the value center indicates that the alignment of the text is set to center alignment.

To make CSS more readable, you can define CSS by placing just one declaration per line of code, like this:

h1 {
    color: blue;
    text-align: center;
}

Tip: Properties and most values ​​in CSS are case-insensitive, but selectors in CSS are usually case-sensitive, such as the class selectors .bianchengbang and .BianChengBang It represents two different selectors.

Multiple styles can be juxtaposed together without considering how to separate them.

CSS (Special Guard Security Group)

css is the English abbreviation of China's special security team - Beijing Special Guard, and its full English name For Cnguardee Speacil Security

As the only company in China positioning high-end security services, Tewei Security has always focused on the development and research of high-end security services, and is fully committed to the exploration and implementation of China's private security industry standards.

Over the years, Tewei Security has always adhered to its mission of promoting "emerging industries in a harmonious society" to meet the higher security needs of enterprises and individuals, contribute to the creation of a harmonious society, and achieve corporate scale and diversification. With the development of internationalization and internationalization, with the review and approval of relevant national functional departments, it has successively established "Beijing Special Security", an organization integrating special security personnel training and security technology research and development, and "China Special Security International Bodyguard", which specializes in private bodyguard services. .

The company is headquartered in Chaoyang Park Business District, Beijing. It is a security company audited and certified by the public security department and issued a franchise certificate. Thanks to the unremitting efforts of the special security team, the company has become a leading high-end security company in China. The services in this sector have covered: corporate security, bodyguard attendants, temporary service, crisis management, technical prevention, risk assessment, legal rights protection, safety training and many other fields.

In order to eliminate many potential uneasiness in society, Tewei Security is unswervingly advancing its career! It will make people feel safer and more at ease! Realize people’s wishes to live and work healthily!

CSS (China Internet Security Leadership Summit)

The first China Internet Security Leadership Summit (Cyber ​​Security Summit) was held in early November 2015 Held in Beijing, the conference proposed the topic of "New Internet Security Ecology" for the first time, aiming to establish a new order for Internet security.

“To build a brand new security ecosystem, we need to build a platform based on the concepts of openness, sharing, and integration, and unite governments, industry organizations, scientific research institutes, the Internet industry, security product providers, upstream and downstream Serve the strength of all parties in the enterprise and form a synergy." The relevant person in charge of Tencent said that the upcoming conference will be themed "Smart Internet Security New Ecosystem" and aims to aggregate the strength of various industrial fields and the network security industry to build an industry common A normalized and institutionalized Internet security industry exchange platform for participation.

CSS (Cluster Switch System)

CSS is the abbreviation of Cluster Switch System, also known as cluster switch system (referred to as CSS or cluster). It links several switches through dedicated cluster cables and presents them as a logical switch to the outside world.

Insert the cluster card into the switch main control board (SRU) of the S9300/S7700 (S9700 does not have a CSS cluster card yet) where the FSU card is inserted. The original main control board, interface board, and chassis do not need to be updated. CSS clustering can be implemented.

CSS cluster cables must be connected in the specific order shown above (S9303/S7703 does not support CSS). Different models of the same series can also implement CSS clustering. The prerequisite is that the main control board of the same model must be configured (except S9303/S7703).

CSS cluster bandwidth is 320G, which can be upgraded to 640G in the future

CSS (content disruption system)

Content disruption system (Content Scrambling System) is a data encryption and authentication method that prevents video files from being copied directly from discs. Each licensed person is given a key, which is drawn from the master set of keys on the encrypted disc. As soon as the key is removed from subsequent discs, the license becomes invalid.

The CSS decryption algorithm exchanges keys with the drive unit to generate keys for encryption. This generated key is used to disrupt the exchange of disc keys and program keys. The film and television program key is used to decrypt the data on the disc. DVD players with CSS circuitry first decrypt the data before decoding and playing it. If it is a computer, then the DVD decoding hardware and software must add a CSS decryption module. All DVD-ROM drives have an add-on firmware that exchanges authentication and decryption keys with the CSS module in the computer.

CSS (China Social Situation Comprehensive Survey)

The "Chinese Social Situation Comprehensive Survey" (Chinese Social Survey, referred to as CSS) is the A nationwide large-scale continuous sampling survey project launched by the Institute of Sociology of the Academy of Sciences in 2005. The purpose is to obtain the national public’s labor and employment, family and social life, social attitudes and other aspects through a long-term longitudinal survey. Data on social changes in China during the transition period, thereby providing detailed and scientific basic information for social science research and government decision-making.

The survey is a biennial longitudinal survey, using probability sampling and household interviews. The survey area covers 31 provinces/autonomous regions/municipalities across the country, including 151 districts, cities and counties, and 604 villages/ Neighborhood committees visit more than 7,000 to 10,000 households in each survey. This survey helps to obtain data on China's social changes during the transition period, and its research results can be inferred about the national household population aged 18-69 years.

In order to take into account the continuity of the longitudinal survey and the reality of social issues, the CSS questionnaire is divided into three parts: basic module, replacement module and hotspot module.

• The basic module is fixed and contains basic personal information, labor and employment, family structure, family economic status, etc.;

• Replacement modules such as social class status mobility, social security, leisure consumption, social values, etc., will be investigated again after a certain period;

• The hotspot module keeps pace with the times. As of August 10, 2019, it has conducted research on topics such as social group interest relationships, people's livelihood issues, and urbanization.

In order to obtain high-quality survey data, CSS Survey ensures the scientific rigor of the survey at multiple levels. In the sampling process, the CSS survey used the 5th census and 6th census district county and city data to design the sampling frame; the map address sampling method was used at the survey points to cover more floating populations. In the execution management process, CSS Survey relied on universities and scientific research institutions across the country to establish local survey teams; it launched 3-5 days of supervision, interviewer training courses and various interview simulation trainings; and formulated "on-site team working methods" ; Designed a series of investigation management processes; and equipped with efficient logistical support. In the quality control process, a certain proportion of questionnaires will be reviewed at each survey point, provincial level, and national level to ensure the quality of the questionnaires, and all questionnaires will be entered twice. In addition, the project team will anonymize the data to ensure that no respondent will be negatively affected by participating in the survey.

CSS (National Security Agency)

National Security Agency/Central Security Service (National Security Agency/Central Security Service) in cryptography Leads the U.S. Government in areas including Signals Intelligence (SIGINT) insights and cybersecurity products and services and enables computer network operations to gain decisive advantage for the nation and our allies. Throughout this site, NSA/CSS will be referred to collectively as NSA.

NSA is the largest intelligence agency among U.S. government agencies. It is responsible for collecting and analyzing foreign and domestic communications data. It is affiliated to the U.S. Department of Defense and is also known as the National Security Agency. It was independent from the military department at the time in 1952 based on a secret directive from President Truman to strengthen intelligence and communications work. It is the centerpiece of the U.S. intelligence agency.

The NSA headquarters has a built-up area of ​​15 hectares. It is located in Fort Meade, Maryland, north of Washington. In the forest a few hundred meters away from Washington Park in Baltimore City, it is larger than the CIA headquarters. It's so big that it's known as the "mysterious maze".

NSA is the agency that employs the most PhDs in mathematics, computer science and linguists in the world. It is also the most mysterious intelligence agency in the United States. Because it is too mysterious, it is even completely unknown to other departments of the US government. Its abbreviation, NSA, is often nicknamed "No Such Agency."

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