【单选题】已知,如图,点A、B、C分别为DB、EC、FA的中点,若△ABC的面积为1,则△DEF的面积为( )
【简答题】用所给词的适当形式填空。 1. I spent an hour (mend) my bike. 2. I (be) to Beijing twice before. 3. I am sorry (trouble) you. 4. The old woman (die) for about ten years. 5. Would you mind (open) the door? 6. Two we...
【单选题】如图所示,若相邻点的水平距离与垂直距离都是1,则多边形ABCDE的面积为( ).
【简答题】A.Doctor and husband. B.Shop-assistant and customer. C.Host and guest. D.Teacher and student.
【单选题】砼灌注桩按 孔方法可分为以下四类:1钻孔灌注桩;2沉管灌注桩;3人工挖孔灌注桩;4爆扩灌注桩。其中,属于挤土 孔的为( )。
【简答题】A. Doctor and husband. B. Shop-assistant and customer. C. Host and guest. D. Teacher and student.
【单选题】在△ ABC 中,角 A 、 B、C 的对边分别为 ,若 ,三角形面积为 , ,则 ( ▲ )
【单选题】Parents have to show due concerns to their children's creativity and emotional output otherwise what they think beneficial to the kids might probably______their enthusiasm and aspirations.