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问题 填空题
观察下列各式
2
1
×2=
2
1
+2，
3
2
×3=
3
2
+3，
4
3
×4=
4
3
+4，
5
4
×5=
5
4
+5…想一想，什么样的两数之积等于这两数之和，设n表示正整数，用关于n的等式表示这个规律为：______．
答案

由所给的各式可知，不妨设分母为n，则分子为n+1，乘数和加数也为n+1，因此可知律为=

n+1
n
+n+1．故填
n+1
n
（n+1）=
n+1
n
+n+1．

选择题

I had thought that he ___ for a least twenty years.

A．had been dying

B．had died

C．had been dead

D．died
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单项选择题

Starting with his review of Skinner’s Verbal Behavior, Noam Chomsky had led the psycholinguists who argue that man has developed an innate (天生的) capacity for dealing with the linguistic universals common to all languages. Experience and learning then provide only information about the (1) instances of those universal aspects of language which are needed to communicate with other people within a particular language (2) .

This linguistic approach (3) the view that language is built upon learned associations between words. What is learned is not strings of words per se (本身), but (4) rules that enable a speaker to (5) an infinite variety of novel sentences. (6) single words are learned as concepts: they do not stand in a one-to-one (7) with the particular thing signified, but (8) all members of a general class.

This view of the innate aspect of language learning is at first not readily (9) into existing psychological frameworks and (10) a challenge that has stimulated much thought and new research directions. Chomsky argues that a precondition for language development is the existence of certain principles "intrinsic (原有的) to the mind" that provide invariant structures (11) perceiving, learning and thinking. Language (12) all of these processes; thus its study (13) our theories of knowledge in general.

Basic to this model of language is the notion that a child’s learning of language is a kind of theory (14) . It’s thought to be accomplished (15) explicit instruction, (16) of intelligence level, at an early age when he is not capable of other complex (17) or motor achievements, and with relatively little reliable data to go on. (18) , the child constructs a theory of an ideal language which has broad (19) power. Chomsky argues that all children could not develop the same basic theory (20) it not for the innate existence of properties of mental organization which limit the possible properties of languages.

19（）

A.instinctive

B.addictive

C.tentative

D.predictive
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