89.设s=" abcd",则执行语句s2= Destr(s,2,2后,S2=A "abedC "ad"D "ab' 89.设s=" abcd",则执行语句s2= Destr(s,2,2后,S2=A "abedC "ad"D "ab' 发布时间:2025-09-14 12:36:55