短文改错。

    Holidays are fun but they also give thieves a lot of chances steal____  things.Follow my advice, and you will safe____ during holidays. Even though you might be busy shop____, always notice what is going on around you____. You never know when someone might be trying to steal something from you pockets. Don't forget____  your bag in your car. It's also important to take care of your homes during the holidays.

【遗址中的历史】

【文物中的历史】

【传说中的历史】

材料一：“轩辕乃修德振兵，治五气，艺五种，抚万民，度四方……蚩尤作乱，不用帝命。于是黄帝乃征师诸侯……遂禽杀蚩尤。”

——《史记·五帝本纪》

材料二：“古者舜耕历山，陶河濒，渔雷泽，尧得之服泽之阳，举以为天子，与接天下之政，治天下之民。”

——《墨子·尚贤》

在“低温诱导植物染色体数目变化”的实验中，其原理或操作步骤叙述正确的是（   ）