What is the news item mainly about?A.Smooth landing of the rover on Mars.B.The stunning in

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What is the news item mainly about?

A.Smooth landing of the rover on Mars.

B.The stunning instruments on the rover.

C.New findings about the planet Mars.

D.Scientists" hard work on the project.

请帮忙给出正确答案和分析,谢谢!

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