若有定义char*language[]={"FORTRAN","BASIC","PASCAL","JAVA","C"};则language[2]的值是()。
A.一个字符
B.一个地址
C.一个字符串
D.不定值
A.一个字符
B.一个地址
C.一个字符串
D.不定值
设R是有限集X上的一个二元关系,证明:
a)对于任意在X上的二元关系R,有R+是可传递的。
b)若有X上任何其他传递关系P,使得
c)R+就是定义3-8.1中所说的传递闭包。
指出下列命题是否正确,若有错误,错误何在?
(1)极限存在,则函数y=(x)在点x0处可导;
(2)函数y=f(x)在点处的导数等于[f(x0)]';
(3)函数y=f(x)在点x0处连续,则f(x)在点x0处可导;
(4)函数y=f(x)在点处可导,则f(x)在点x0处可导;
(5)函数y=|f(x)|在点x0处可导,则f(x)在点x0处可导;
(6)初等函数在其定义区间内必可导.
Proponents of this innateness theory say that our38for language is inborn, but that language itself develops gradually,39a function of the growth of the brain during childhood.Therefore there are critical40times for language development.Current41of innateness theory are mixed, however, evidence supporting the existence of some innate abilities is undeniable.42, more and more schools are discovering that foreign languages are best taught in43grades.Young children often can learn several languages by being44to them, while adults have a much harder time learning another language once the45of their first language have become firmly fixed.46some aspects of language are undeniably innate, language does not develop automatically in a vacuum.Children who have been47from other human beings do not possess language.This demonstrates that48with other human beings is necessary for proper language development.Some linguists believe that this is even more basic to human language49than any innate capacities.These theorists view language as imitative, learned behavior.50, children learn language from their parents by imitating them.Parents gradually shape their child's language skills by positively reinforcing precise imitations and negatively reinforcing imprecise ones.
31.A.generateD. B.evolveD. C.born D.originated
32.A.valuable B.appropriate C.convenient D.favorite
33.A.attainments B.feasibility C.entertainments D.evolution
34.A.essential B.available C.reliable D.responsible
35.A.confirm B.inform. C.claim D convince
36.A.for B.from C.of D.with
37.A.organizations B.organisms C.humans D.children
38.A.potential B.performance C.preference D.passion
39.A.as B.just as C.like D.unlike
40.A.ideological B.biological C.social D.psychological
41.A.reviews B.reference C.reaction D.recommendation
42.A.In a worD. B) In a sense C.IndeeD. D.In other words
43.A.various B.different C.the higher D.the lower
44.A.revealeD. B.exposeD. C.engageD. D.involved
45.A.regulations B.formations C.rules D.constitutions
46.A.Although B.Whether C.Since D.When
47.A.distinguished' B.different C.protecteD. D.isolated
48.A.exposition B.comparison C.contrast D.interaction
49.A.acquisition B appreciation C.requirement D.alternative
50.A.As a result B.After all C.In other words D.Above all
A.in the front
B.in front
C.in appearance
D.facing
A.English
B.Business English
C.language
D.Chinese
A project manager trying to communicate accurately to the team should use:
A the language of the team members
B the language of the project manager
C non-verbal methods
D written memos
E All of the above.
A.the structural view
B.the communicative view
C.interactional view
D.functional view