以下各小题均有一处错误，请指出并加以订正
①甲骨文是指刻写在青铜器上的一种比较成熟的文字，对研究商朝历史有重要的价值。老师：“不少历史知识都用到‘最早’二字，你知道的有哪些？”____
②小明：“目前我国境内已知最早的人类是北京人。我国是世界上最早种植水稻的国家之一。我国最早的国家是夏朝。”____
③张三按《伤寒杂病论》中记载的方法给他的父亲服用“麻沸散”减轻了病痛。____
④小华来到河南安阳殷墟遗址，对商朝创业史做了全面调查。____
⑤小蔡从《齐民要术》一书中了解了南北朝时期泉州地区农、林等生产技术的状况。____

方程（x+1）（x﹣2）=x+1的解是（　　）

    Today is Saturday. The weather is warm and sunny. Bob and Jack go to the park. There are many people there. The girl under a big tree is reading a book. Two boys are playing football on the grass. The girl in a red dress is riding a bike. Two women are talking. The man beside these women is playing with a baby. Bob and Jack are beside the river. They are sitting on the chair and drawing pictures.

⑴It's warm and sunny ____       A. are beside the river.

⑵There are many people ____    B. are talking.

⑶Two boys ____                 C. in the park.

⑷Two women ____              D. are playing football on the grass.

⑸Bob and Jack ____             E. on Saturday.

在平直的公路上，一辆汽车正以20m/s的速度匀速行驶，所受阻力为5×10³N．因前方出现事故，司机立即刹车，直到汽车停下，已知汽车的质量为3×10³kg，刹车时汽车所受的合力为1.5×10⁴N，求：