单项选择题
以下不正确的CASE 子句是(设x1,x2均已赋值,且x1
A.CASE 1>10,1 TO 10
B.CASE x1 TO x2
C.CASE x1 TO x1+5
D.CASE ″2″TO ″1″
A.CASE 1>10,1 TO 10
B.CASE x1 TO x2
C.CASE x1 TO x1+5
D.CASE ″2″TO ″1″
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