如图,直线l1与l2相交于点O,OM⊥l1,若α=44°,则β=( ) A.56° B.46° C.45° D.44° 答案:B【考点】垂线;对顶角、邻补角. 【专题】计算题. 【分析】由题意可得α+β=90°,把α=44°代入求解即可. 【解答】解:∵OM⊥l1, ∴β+90°+α=180°, 把α=44°代入,得β=46°. 故选:B. 【点评】利用垂线的定义得出α+β=90°,是解本题的关键. — will the foreign students be back from Qufu?—In two days.A.How longB.How soonC.How manyD.How far