According to the passage, how much would a manned space flight to Mars cost?

Câu hỏi :

According to the passage, how much would a manned space flight to Mars cost?

A Just over five billion dollars.   

B About a billion dollars.

C Several hundred billion dollars.    

D Around one hundred billion dollars.

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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