s$="abcdefghijk",Mid$(s$,1,4)的值是()。
A、“efghijk”
B、“hijk”
C、“abcd”
D、abcdefg
A、“efghijk”
B、“hijk”
C、“abcd”
D、abcdefg
A、A.the mid-1950s B、B.the mid-1960s C、C.the 1970s D、D.the 1980s
A、mid(2,s) B、charAt(2) C、s.indexOf(“v”) D、indexOf(s,”v”)
A、mid(2,s); B、charAt(2); C、s.indexOf(’’v’’); D、indexOf(s,’’v’’);
A、.BO和.MID B、.WAV和.MIDI C、.MID和.WAV D、.AVI和.MID
A、equatorial area B、polar regions C、mid-latitudes D、All of the above