With sufficient scientific information a manned trip to Mars should be _____.
A. obtainable B. potential C. considerable D. feasible
With sufficient scientific information a manned trip to Mars should be _____.
A. obtainable B. potential C. considerable D. feasible
D
feasible(=that can be done)可行的，可做到的：1)Your plan sounds quite feasible.(你的计划听起来很可行。) 2)It's not feasible to make the trip in one day.(一天内要进行这次旅行是做不到的。)obtainable可得到的；considerable相当的，可观的；potential潜在的，可能的。