With sufficient scientific information a manned trip to Mars should be .
A. obtainable
B. potential
C. considerable
D. feasible
网友回答
A. obtainable
B. potential
C. considerable
(答案→)D. feasible
解析: 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。