以下是举办听证会过程的一般步骤，你认为最合理的是（   ）

①将全班同学分成小组，扮演不同的角色

②各小组分别准备资料

③确定听证会主题

④听证会主持人总结

⑤模拟听证会的程序，各小组推荐代表陈述观点

C

    When Matty Sallin，34，was working on a degree in art and technology at New York University，he got interesting homework in electronics class．He decided to create an alarm clock(闹钟)．

    "Everybody has to deal with these every day，and they are really unpleasant!"he says．He asked different people what they would like to wake up to instead of a noisy alarm．A lot of them said，"The smell of bacon(培根肉)"．

    So Sallin and two classmates invented a new kind of alarm clock：a wooden box with a pig face and a digital clock that uses the smell of cooking bacon instead of the sound to wake someone up．He explains．"There's no danger of burning，because I built it carefully．It uses halogen light bulbs(卤素灯)instead of a fire for cooking and turns off automatically after ten minutes．Yes,the clock itself can do it．Just a few easy steps are needed to set the alarm．"

    "What you do is to put some frozen bacon in the night before and set the alarm，"says Sallin．

    "If you set the alarm for 8：00,it will turn on at 7：50 and slow cook for ten minutes under the halogen bulbs．"he says，Then the bulbs turn off and a fan blows the smell out through the nose of the pig．

    "So instead of an alarm，  ▲，"says Sallin．"Then you can open the door on the side and pull the bacon out and eat it．"

    When Sallin was a kid，he spent a lot of time making drawing of inventions．"I wanted to make an lift in my backyard and a special tree house．"he says．"But I never really thought I'd be called an inventor!"

    Sallin got an A in the class and went on to other things—but people continue to hear about his invention and email him every day asking where they can buy his alarm clock．

小强同学选择了一只量程适当的温度计，插入热水后立即拿出来，进行读数；请纠正他操作中的两处错误：