请写出古往今来,曾被统治者埋没甚至迫害过的名人及这些人发出了无尽的感慨。____，____。

①海洛因   ②可卡因   ③鸦片、吗啡   ④使人上瘾的麻醉品和精神药品

    Scientists say life will be very different in 2050.

    First，there will be no TV channels（频道）in 2050.People will choose a program from a computer and watch it on TV.In 2050，we will get information from the computers only.

    Second，water will be a big problem in 2050.In many places，people won't have water to drink.

    Third，cars will use new and clean fuels and they will go very fast.There will be a computer in every car.And the computers will control the cars and there won't be any accidents（事故）.