sentence.substr(a,b)中substr 代表什么?

sentence.substr(a,b)中substr 代表什么? k=alltrim(thisform.text1.value) a=substr(k,3,1) b=substr(k,2,1) c=substr(k,1,1) if k>=100 andk oracle中 substr(a,0,4) = b(+) 重要的是后面你个（+）是什么意思 表达式VAL(SUBSTR(电脑486,5,1))*LEN(FOXPRO)的结果是________ A、4 B、24 C、20 D、12 表达式VAL(SUBSTR(电脑486,5,1))*LEN(FOXPRO)的结果是________ A、4 B、24 C、20 D、12 Write a sentence with the ___ wordsA giving B given Which of the following is not a member function of the apstring class?a:length( )b:substr(x,y)c:atof(s)d:c_str( ) 在 Visual FoxPro中,若 ABC=SUBSTR('ABCDEFGH',2,4),则 ABC 的值为________.A) 'ADEF' B) 'DE' C) 'ABCDEFD) 'BCDE 下列函数中返回值为数据型的是?A.SUBSTR B.STR C.AT.D.SPACE坐等…… change the sentence into a sentence SUBSTR(sfz, make a sentence是什么意思 In A Sentence 歌词 22.设变量x 的值为FOXPRO,则下列表达式中运算结果为.T.的是A.AT(PR,x) B.BETWEEN(x,A”,”J)C.SUBSTR(LOWER(x),4)$x D.ISNULL(SUBSTR(x,7))为什么选择B 解释解答英语专八人文语言语义学（semantics）题目,搞晕了,懂得来~When the meaning of sentence A is included in sentence B,then we can say thatA.Sentence A is an entailment of sentence BB.Sentence A entails sentence B 3.________,the majority of the students have no trouble understanding it.A.As complex the sentence is B.Complex as the sentence isC.As the sentence is complex D.Complex as is the sentence sentence Sentence