![Now,itmaybedifficulttopredictthefuture,butmanypeoplebe...]( "Now,itmaybedifficulttopredictthefuture,butmanypeoplebe...")
- 問題詳情： Now,itmaybedifficulttopredictthefuture,butmanypeoplebelievethatwewillliveonMarsbytheyear2100.Ourownplanet,Earth,isbecomingmoreandmorecrowdedandpolluted.Well,whatproblemswillweneedtosolvebeforewepreparetogotoMars?Firstofall,transportshouldbe...
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