In 2012, Jiaolong manned submersible made a 7000 meter sea trial. Before that, only the US, France and Russia had manned deep su-未来题库

In 2012, Jiaolong manned submersible made a 7000 meter sea trial. Before that, only the US, France and Russia had manned deep su

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：B

Tags:manned submersible submarines

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