表學(xué)生.DBF中共有20個記錄,順序執(zhí)行下面命令:
SET DELETED OFF
USE 學(xué)生
DELETE
COUNT TO AA
PACK
COUNT TO AA
ZAP
COUNT TO AA
USE
3次COUNT 得到的AA結(jié)果分別為()
A.19,19,1
B.19,19,0
C.20,19,0
D.20,19,19
A.SHOW
B.REFRESH
C.RELEASE
D.FORECOLOR