IF di1 = 1 AND di2 = 0 THEN ！1、_____________________ ryuan; ！2、_____________________ ELSEIF di1 = 0 AND di2 = 1 THEN rfang; ENDIF 解释1、2处的程序的功能及作用
IF di1 = 1 AND di2 = 0 THEN ！1、_____________________ ryuan; ！2、_____________________ ELSEIF di1 = 0 AND di2 = 1 THEN rfang; ENDIF 解释1、2处的程序的功能及作用
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