设有两个串p和q,其中q是p的子串,求q在p中首次出现的位置的算法称为()There are two strings p q, q is p’s substring. The algorithm to search the first time q appeared in p is called()(There is only one correct answer)
A.求子串 Seeking substring B.联接 Concatenation C.匹配 Matching D.求串长 Seeking length