شرکت در آزمون آنلاین زبان انگلیسی 2 - زبان انگلیسی 2 | آزمون شماره 6806

A crowd was waiting at the airport to ......... the students who had won Silver Medal in Computer Olympiad and were coming back from Russia.

In our English class , our teacher doesn't let us speak a word of Farsi ; we must speak ............................... in English.

.Life expectancy for both men and women has improved ...................... in the past ۲۰ years

 Human language is unique in comparison to other forms of communication, such as those used by non-human animals. Communication systems used by other animals such as bees or apes are closed systems that consist of a finite, usually very limited, number of possible ideas that can be expressed.

In contrast, human language is open-ended and productive, meaning that it allows humans to produce a vast range of utterances from a finite set of elements, and to create new words and sentences. This is possible because human language is based on a dual code, in which a finite number of elements which are meaningless in themselves (e.g. sounds, letters or gestures) can be combined to form an almost infinite number of larger units of meaning (words and sentences). Furthermore, the symbols and grammatical rules of any particular language are largely arbitrary, so that the system can only be acquired through social interaction. The known systems of communication used by animals, on the other hand, can only express a finite number of utterances that are mostly genetically determined.

Several species of animals have proved to be able to acquire forms of communication through social learning: for instance a bonobo named Kanzi learned to express itself using a set of symbolic lexigrams. Similarly, many species of birds and whales learn their songs by imitating other members of their species. However, while some animals may acquire large numbers of words and symbols, none have been able to learn as many different signs as are generally known by an average 4 year old human, nor have any acquired anything resembling the complex grammar of human language.

The writer names bees and apes as examples to prove that … .

Only by a/an … plan of study you can be successful in the university entrance exam. There are no shortcuts for it. Believe me!