“丁凡同学制作的电动木筏,在学校小发明小制作比赛中荣获了第二名。”听到这个激动人心的消息,看到大家向我投来赞许的目光,我不禁想起了自己制作电动木筏的酸甜苦辣。那天,学校通知要举办小发明小制作比赛。平时,我喜欢摆弄小玩具,脑袋瓜还算灵活,因此,老师把这次参赛的任务交给了我。制作什么呢?我决定做一个电动木筏。设计方案拟订好了,开始选材。我在爸爸的家具厂里精心挑选了八九根小木块,每根截成40厘米的长 “Electric rafts made by Ding Fan students won second place in the school’s small invention competition.” I can not help but think of myself when I hear this exciting news and see everyone’s approval of me Produced by electric raft ups and downs. On that day, the school advised to organize a small invention contest. Usually, I like playing with small toys, head melon fairly flexible, therefore, the teacher gave me the task of participating. What to make? I decided to make an electric raft. Design a good plan, begin material selection. I daddy’s furniture factory carefully selected eighty-nine small wooden pieces, each cut into 40 cm long