【简答题】A.He knows her from their elementary school science class. B.She knows him from computer science class. C.They went to the same high school. D.She is his sister.
【单选题】She is new here. So she knows ____ about her school
【简答题】公路洒水车的供水压力一般达( ) Mpa ,一般用于公路施工、养护作业;而清洗车是利用高压水泵产生的( ) MPa 高压水,通过车前清洗架的特制喷嘴,在车的前方形成一道水帘,从而冲洗路面。
【判断题】某直线为南偏西45°,则该直线的方位角为225°。
【判断题】道路洒水车在洒水作业时,一般前喷头位置高,以便冲洗路面;而后喷头位置低,以利于公路施工洒水作业。
【判断题】用mline(多线)命令只能同时绘制两条线。
【判断题】用MLINE多线命令只能同时绘制两条线。