设数列{a n }是等差数列,a 5 =6. (1)当a 3 =3时,请在数列{a n }中找一项a m ,使得a 3 ,a 5 ,a m 成等比数列; (2)当a 3 =2时,若自然数n 1 ,n 2 ,…,n t ,… (t∈N * )满足5<n 1 <n 2 <…<n t <…使得a 3 ,a 5 , , ,…, ,…是等比数列,求数列{n t }的通项公式.
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【单选题】Bungee jumping is a sport ________ a person makes a vertical jump from a high platform with a rubber cord tied to their ankles so that they bounce.