A..T.
B.3
C.1
D.出错
[单选题]表达式AT("IS","THIS IS A BOOK")的运行结果是( )。A..T.B.3C.1D.出错
[单选题]运算结果是字符串"book"的表达式是A.LEFT(″mybook″,4)B.RIGHT(″bookgood″,4)C.SUBSTR(″mybookgood″,4,4)D.SUBSTR(″mybookgood″,3,4)
[单选题]表达式LEN(SPACE(0)的运算结果是A.NULLB.1C.0D." "
[单选题]表达式LEN(SPACE(0))的运算结果是A.NULL.B.1C.0
[单选题]表达式LEN(SPACE(O))的运算结果是A..NULL.B.1C.O
[单选题]表达式LEN(SPACE(0))的运算结果是A.NULLB.1C.0D.
[单选题,A2型题,A1/A2型题] 表达式LEN(SPACE(O))的运算结果是()A . NULL.B . 1C . 0D . ″″E . 2
[单选题]表达式LEN(SPACE(00的运算结果是 ______。A.NULL.B.1C.0
[单选题]运算结果是字符串“home”的表达式是( )。A.LEFT("myhome",4)B.RIGHT("hometown",4)C.SUBSTR ("myhometown",4,4)D.SUBSTR("myhometown",3,4)
[单选题]运算结果是字符串“home”的表达式是( )。A.LEFT("myhome",4)B.RIGHT("hometown",4)C.SUBSTR("myhometown",4,4)D.SUBSTR("myhometown",3,4)