Most scientists believe that there is__ __ on Mars __ __ __are very harsh.大多数科学家认为火星上
问题描述：
Most scientists believe that there is__ __ on Mars __ __ __are very harsh.大多数科学家认为火星上
Most scientists believe that there is__ __ on Mars __ __ __are very harsh.
大多数科学家认为火星上没有生命因为那儿的条件非常恶劣
答
no live,because environment there