A.指令B.網(wǎng)絡(luò)C.系統(tǒng)D.變量
A.IF條件1THEN語(yǔ)句[ELSEIF條件2THEN語(yǔ)句][ELSE 語(yǔ)句]END IFB.IF條件1THEN語(yǔ)句[ELSEIF條件2THEN語(yǔ)句][ELSE 語(yǔ)句]C.IF條件1語(yǔ)句[ELSEIF條件2THEN 語(yǔ)句][ELSE 語(yǔ)句]END IFD.條件1THEN語(yǔ)句[ELSEIF條件2THEN語(yǔ)句][ELSE 語(yǔ)句]END IF