2022年12月大学英语四级高频词汇活记活用(26)A language is a signaling system which operates with symbolic vocal sounds (语声), and which is used by a group of people for the purpose of communication.Lets look at this _1_ in more detail because it is language, more than anything else, _2_ distinguishes man from the rest of the _3_ world.Other animals, it is true, communicate with one another by _4_ of cries: for example, many birds utter _5_ calls at the approach of danger; monkeys utter _6_ cries, such as expressions of anger, fear and pleasure. _7_ these various means of communication differ in important ways _8_ human language. For instance, animals cries do not _9_ thoughts and feelings clearly. This means, basically, that they lack structure. They lack the kind of structure that _10_ us to divide a human utterance into _11_.We can change an utterance by _12_ one word in it with _13_: a good illustration of this is a soldier who can say, e.g., “tanks approaching from the north“, _14_ who can change one word and say aircraft approaching from the north” or “tanks approaching from the west”; but a bird has a single alarm cry, _15_ means “danger!”This is why the number of _16_ that an animal can make is very limited: the great tit (山雀) is a case _17_ point; it has about twenty different calls, _18_ in human language the number of possible utterances is _19_. It also explains why animal cries are very _20_ in meaning.1.A) classification B) definition C) function D) perception2.A) that B) it C) as D) what3.A) native B) human C) physical D) animal4.A) ways B) means C) methods D) approaches5.A) mating B) exciting C) warning D) boring6.A) identical B) similar C) different D) unfamiliar7.A) But B) Therefore C) Afterwards D) Furthermore8.A) about B) with C) from D) in9.A) infer B) explain C) interpret D) express10.A) encourages B) enables C) enforces D) ensures11.A) speeches B) sounds C) words D) voices12.A) replacing B) spelling C) pronouncing D) saying13.A) ours B) theirs C) another D) others14.A) so B) and C) but D) or15.A) this B) that C) which D) it16.A) signs B) gestures C) signals D) marks17.A) in B) at C) of D) for18.A) whereas B) since C) anyhow D) somehow19.A) boundless B) changeable C) limitless D) ceaseless20.A) ordinary B) alike C) common D) general