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第126章 考教(1 / 2)

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第 126 章 考教

日子在李明、陈华、赵婷、孙宇和吴悠为乡村带来的种种改变中悄然流逝。这一天,戴浩文决定前往乡村,看望这些令他骄傲的学生,同时考教他们这段时间所学知识的运用情况。

戴浩文骑着一匹骏马,带着些许书籍和文房四宝,沿着乡间小道缓缓而来。当他踏入村庄时,立刻引起了村民们的注意,大家纷纷热情地向他打招呼。

孩子们正在田间帮助村民劳作,听闻先生到来,兴奋地飞奔回来。

李明率先行礼道:“先生,您来了!”

戴浩文微笑着点头:“孩子们,别来无恙啊。”

众人簇拥着先生来到村里的一棵大槐树下,围坐在一起。

戴浩文说道:“这段时间在乡村,想必你们都有不少的实践经历,今日我便来考考你们所学。”

陈华自信地说道:“先生尽管考,我们定不辜负您的期望。”

戴浩文指了指不远处的一片稻田,说道:“那片稻田呈梯形,已知上底、下底和高,你们如何计算其面积?”

赵婷略作思考,回答道:“先生,梯形面积等于(上底 + 下底)乘以高除以二。”

戴浩文满意地点点头,接着又问:“若要在这片稻田中修建平行的灌溉小渠,已知水流速度和稻田面积,如何确定小渠的数量和间距?”

孙宇说道:“先根据面积和水流速度计算所需的总水量,再根据小渠的流量,便可得出小渠数量,间距则根据稻田的宽度平均分配。”

戴浩文笑着说:“不错不错。那我再问,村里要建一座新的仓库,打算修成矩形,以知材料长度,如何设计能使仓库的面积最大?”

吴悠答道:“当矩形的长和宽相等,即为正方形时,面积最大。”

戴浩文抚须称赞:“回答得很好。那我再出一题难的。村庄准备修建一座拱桥横跨河流,已知河宽和拱的高度,如何确定拱的弧度以保证桥的稳固?”

这下孩子们陷入了沉思,纷纷低声讨论起来。过了一会儿,李明起身说道:“先生,我们可以利用相似三角形的原理,通过测量一些关键距离,计算出拱的弧度。”

戴浩文眼中闪过一丝惊喜:“嗯,思路不错。那假如要在桥面上铺设石板,石板之间需要保持平行,以知桥的长度和坡度,如何计算石板的长度和角度?”

陈华接过话头:“根据坡度和桥长,可以计算出桥的垂直高度变化,从而得出石板的长度和角度。”

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