I regret having left the work unfinished, I ____________ everything ahead carefully.A、should planB、should have plannedC、plannedD、must plan
I regret having left the work unfinished, I ____________ everything ahead carefully.
A、should plan
B、should have planned
C、planned
D、must plan
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下列程序段的结果为 ______。 A= "ABBACDDCBA" For I= 6 To 2 Step-2 X=Mid(A，I，I) Y=Left(A，I) Z=Right(A，I) Z=X Y Z Next I Print ZA．ABAB．AABAABC．BBABBAD．ABBABA
（ 10 ）执行下列程序，显示的结果是 【 10 】 。one= "WORK"two = ""a = LEN ( one )i = aDO WHILE i=1two = two + SUBSTR ( one ,i , 1 ）i=i - 1ENDDO? two
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