化减逻辑表达式F=AB+AC+BCD，其结果是（）。

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EMPTY(.NULL.) EMPTY(SPACE(8)) LIKE("edit","edi") AT("a","ainimal")

A A2+AB+AC+BC A+BC （A+（A+

EMPTY(.NUL) EMPTY(SPACE(8)) LIKE("edit","edi") AT("a","ainimal")

字符运算表达式算术运算表达式日期运算表达式关系运算表达式

EMPTY (.NULL.) EMPTY (SPACE(8)) LIKE("edit","edi") AT("a","ainimal")

.F. T .T. F

'this'$'this is a string' 'this'$'THIS IS A STRING' 'this is a string'$'this' 'this'>'this is a string'

F=XY+Z

'this'$'this is a string' 'this'$'THIS IS A STRING' 'this is a string'$'this' 'this'＞'this is a string'

字符型逻辑型数值型日期型

EMPTY (.NUL) EMPTY (SPACE(8)) LIKE("edit","edi") AT("a","ainimal")

'this'$'this is a string’ 'this'$'THIS IS A STRING' 'this is a string'$'this' 'this'＞'this is a string'

字符表达式关系表达式算术表达式日期表达式

算术运算表达式字符运算表达式日期运算表达式关系运算表达式

'this'$'this is a string' 'this'$'THIS IS A STRING' 'this is a string'$'this' 'this'＞'this is a string'

'this'$'this is a string' 'this'$'THIS IS A STRING' 'this is a string'S'this' 'this'＞'this is a string'

字符运算表达式关系运算表达式算术运算表达式日期运算表达式

算术运算表达式字符运算表达式日期运算表达式关系运算表达式

数值运算表达式字符运算表达式关系运算表达式日期运算表达式