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单选题
过点（1，2）且与直线2x＋y－3＝0平行的直线方程为（　　）．
A

2x＋y－5＝0

B

2y－x－3＝0

C

2x＋y－4＝0

D

2x－y＝0

参考答案

参考解析
解析：
设和2x＋y－3＝0平行的直线方程为2x＋y＋c＝0，将（1，2）代人，则有2×1＋2＋c＝0，得c＝－4．
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