The Qiantang River Bridge is comprised of its main body and the bridge approach, stretching a distance of 1,453 meters. The upper layer of the bridge is a highway and the layer below is a railway.

The Qiantang River Bridge is comprised of its main body and the bridge approach, stretching a distance of 1,453 meters. The upper layer of the bridge is a highway and the layer below is a railway.
A.正确
B.错误
正确答案：正确