- 問題詳情:Tohitch-hikesuccessfullyinanycountryyoumustbeabletodotwothings:attractattentionandatthesametimeconvincethedriverataglancethatyoudonotintendtorobormurderhim.Tofulfillthefirstrequirementyoumusthavesomemarktodistinguishyouatoncefromallotherhikers...
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