What is the reason why Luoyang Bridge is called "the miracle of the world"?

1, because ① Luoyang Bridge is the first cross-sea stone bridge in China, and there are many innovations in architecture; (2) adopting "raft bridge foundation";

(3) planting oysters to bond the stone strips together; (4) Floating construction.

The craftsman who built this bridge was inspired by the ebb and flow of the tide and adopted the floating method.

3. When the tide is high, craftsmen will use rafts to transport stones to the dock and put them on the dock by the buoyancy of the high tide.

Open. .

4. "First" means: ① Luoyang Bridge is the first cross-sea stone bridge in China, with many innovations in architecture; (2) adopting "raft bridge foundation"; (3) planting oysters to bond the stone strips together; (4) Floating construction.

5, (omitted) (hint: the answer is not unique, as long as it is meaningful).