In 2012， Jiaolong manned submersible made a 7000 meter sea trial.Before that， only the US， France and Russia had manned deep submarines in the worlD.
In 2012， Jiaolong manned submersible made a 7000 meter sea trial.Before that， only the US， France and Russia had manned deep submarines in the worlD.
A.正确
B.错误
正确答案：错误
Tag：向世界讲述中国
时间：2023-12-18 15:29:13
- 上一篇：Jiaolong is the first operational deep-sea manned submersible designed independently in China.It is the most capable operational manned submersible in the world at present.
- 下一篇：In the spring of 1961， Yuan planted the seeds of the mutant in a pioneering field， proving that the plant， discovered in 1960， was a " natural hybrid rice" .