【单选题】In a suspension bridge, the shape of the suspension cables is parabolic. The bridge shown in the figure has towers that are 400 m apart, and the lowest point of the suspension cables is 100 m below th...
【简答题】A.The man will take the trip during January. B.The woman has been to New Mexico. C.The man will take skate and skis with him. D.The weather at high altitude is great.
【简答题】A.The A41 at the Dome corner has few cars. B.The A1M near Hatfield, Harrow Road has heavy traffic. C.The A404, Harrow Road is very busy with many cars. D.The A1M is now flowing freely without problems...