Different types of letters pdf

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How to understand different types of text. The BBC is not responsible for the content of different types of letters pdf sites.

Read about our approach to external linking. Centers for Disease Control and Prevention. Note: Javascript is disabled or is not supported by your browser. For this reason, some items on this page will be unavailable. There are four types of influenza viruses: A, B, C and D. Human influenza A and B viruses cause seasonal epidemics of disease almost every winter in the United States.

The emergence of a new and very different influenza A virus to infect people can cause an influenza pandemic. Influenza type C infections generally cause a mild respiratory illness and are not thought to cause epidemics. Influenza D viruses primarily affect cattle and are not known to infect or cause illness in people. There are 18 different hemagglutinin subtypes and 11 different neuraminidase subtypes. H1 through H18 and N1 through N11 respectively.

Influenza A viruses can be further broken down into different strains. The new virus caused the first influenza pandemic in more than 40 years. H1N1 virus that was previously circulating in humans. Influenza B viruses are not divided into subtypes, but can be further broken down into lineages and strains. CDC follows an internationally accepted naming convention for influenza viruses. For human-origin viruses, no host of origin designation is given. Getting a flu vaccine can protect against flu viruses that are the same or related to the viruses in the vaccine.

The seasonal flu vaccine does not protect against influenza C viruses. Additionally, flu vaccines will NOT protect against infection and illness caused by other viruses that also can cause influenza-like symptoms. Exercise in identifying different types of text. Examples of different text types for practice. This article is about sets of letters used in written languages.

Thus the Phoenician alphabet is considered to be the first alphabet. Many languages use modified forms of the Latin alphabet, with additional letters formed using diacritical marks. Alphabets are usually associated with a standard ordering of letters. Knowing one’s ABCs”, in general, can be used as a metaphor for knowing the basics about anything. 15th century BC, apparently left by Canaanite workers.

In 1999, John and Deborah Darnell discovered an even earlier version of this first alphabet at Wadi el-Hol dated to circa 1800 BC and showing evidence of having been adapted from specific forms of Egyptian hieroglyphs that could be dated to circa 2000 BC, strongly suggesting that the first alphabet had been developed about that time. Based on letter appearances and names, it is believed to be based on Egyptian hieroglyphs. This script had no characters representing vowels, although originally it probably was a syllabary, but unneeded symbols were discarded. This script was not used after the destruction of Ugarit. This script is the parent script of all western alphabets. These letters have a dual function since they are also used as pure consonants. Another advantage of Phoenician was that it could be used to write down many different languages, since it recorded words phonemically.

The script was spread by the Phoenicians across the Mediterranean. In Greece, the script was modified to add the vowels, giving rise to the ancestor of all alphabets in the West. The vowels have independent letter forms separate from the consonants, therefore it was the first true alphabet. The Greeks chose letters representing sounds that did not exist in Greek to represent the vowels. Greeks from the 16th century BC had 87 symbols including 5 vowels. In its early years, there were many variants of the Greek alphabet, a situation that caused many different alphabets to evolve from it. Europe as the Romans expanded their empire.

Even after the fall of the Roman state, the alphabet survived in intellectual and religious works. The Runic alphabets were used for Germanic languages from AD 100 to the late Middle Ages. Its usage is mostly restricted to engravings on stone and jewelry, although inscriptions have also been found on bone and wood. These alphabets have since been replaced with the Latin alphabet, except for decorative usage for which the runes remained in use until the 20th century. It was in use during the entire history of Hungary, albeit not as an official writing system. From the 19th century it once again became more and more popular. P to look like the widened mouth, L to look like the tongue pulled in, etc.