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The intense interest in probing the Martian soil for water is no mere (i)________ preoccupation. Beyond solving the mystery of where Mars's surface water went, scientists are simply being (ii)________. Human exploration or even settlement of Mars is being considered as a real possibility, and it certainly will not be cost-effective to (iii)________ water.
- Blank(i)
- long-term
- practical
- geologic
- Blank(ii)
- pragmatic
- careless
- objective
- Blank(iii)
- bring along huge amounts of
- have no indigenous resources other than
- extract sufficient water from the surface soil
geologic , pragmatic , bring along huge amounts of 显示答案
以上解析由 考满分老师提供。
