(22)在Visual FoxPro中有如下程序:*程序名:TEST .PRG*调用方法:DO TESTSET TALK OFFCLOSE ALLCLEAR ALLmX = 'Visual FoxPro 'mY = '二级'DO SUB1 WITH mX?mX+mYRETURN*子程序:SUB1.PRGPROCEDURE SUB1PARAMETERS mX1LOCAL mXmX ='Visual FoxPro DBMS 考试'mY ='计算机等级'+mYRETURN执行命令DO TEST后,屏幕的显示结果为A)二级Visual FoxProB)计算机等级二级Visual FoxPro DBMS考试C)二级Visual FoxPro DBMS考试D)计算机等级二级Visual FoxPro