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[单选题]
函数Mid(“abcdefg”,3,4)的返回值是()
A.abc
B.abcd
C.cdef
D.没有这样的函数
查看答案
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A.abc
B.abcd
C.cdef
D.没有这样的函数
设串s1='ABCDEFG',s2='PQRST',函数con(x,y)返回x和y串的连(s,i,j)返回串s的从序号i的字符开始的j个字符组成的子串,len(s)返回串s的con(subs(s1,2,len(s2)),subs(s1,len(s2),2)的结果串是()
A.BCDEF
B.BCDEFG
C.BCPQRST
D.BCDEFEF
语句 SELECT INSERT('ABCDEFG',3,2,'XYZ'), REPLACE('123456789','6','ABC');的执行结果是()。
A、ABCXYZFG, 12345ABC789
B、ABXYZEFG, 12345ABC789
C、ABCXYZEFG, 123456ABC789
D、ABXYZEFG, 12345ABC9
According to the forecast the lowest recorded temperature was ______.
A.5l degrees
B.65 degrees
C.in the upper 60s
D.in the mid to upper 70s