D值法的提出者是（）。 A: 武滕清 B: 陈绍蕃 C: Robert Maillart D: Othmar Ammann

In designing the Verrazano Bridge, Othmar Ammann . A: had to account for the curvature of the earth's surface B: spent over a year building the platforms that form the bridge's base C: had to consider the number of vehicles that might cross the bridge at any one time D: wished to reduce the size of the bridge as much as possible