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A Chinese university has built the world’s longest 3D-printed bridge. The creation has a 【小题1】(long) of 26.3 meters and a width of 2.6 meters. Its design came from the historical Zhaozhou Bridge 【小题2】(build) in AD 605.

【小题3】 the ancient Zhaozhou Bridge required a decade to build, the team spent only 450 hours【小题4】(complete) all of their new bridges concrete parts. Besides, the bridge’s cost came in at just two thirds of that of 【小题5】 ordinary bridge.

The bridge consisted 【小题6】 44 individual 3D-printed concrete units, each of them approxi-mately 3 by 3 by 5 feet. The sides, influenced by the Zhaozhou Bridge, 【小题7】(make) with 68 single concrete plates moved into place by robot arms.

The leader of the team noted that “the demand for labor in construction projects will be in short supply increasingly” in the future. If China cannot find people to build bridges, “intelligent construction will become an 【小题8】(importance) channel to solve this problem”.

There 【小题9】(be) other 3D-printed architectural projects over the last few years, as the technology has become【小题10】(popular) than before. A team at MIT built a sample house in 14 hours. If there are ever houses on Mars NASA suspects the houses also will be built by robots using 3D printing.