根据中文或首字母写出单词，使句子完整准确。
What he said was already____ (记录) by the police.
Congratulations! You've answered all the questions____ (正确地).
Mr Wu received a present from his friend, but he didn't a____ it..
The camera was one of the greatest ____ (发明)in the world.
You have to be p____ enough to wait for your turn.
Now people eat____ (health) than before and many of them pay much attention to doing sports after work.
The boy____ (take) to hospital at once after he fell off the tree.
we must do what we can____ (save) the girl. She is too young.
We hope that more charity shows____ (hold) to raise money for Project Hope.
The boy considered ____ (he) as the smartest boy in his class.

节能环保日益受到人们的重视，水污染治理也已成为“十三五”规划的重要议题．某地有三家工厂，分别位于矩形ABCD的两个顶点A、B及CD的中点P处，AB=30km，BC=15km，为了处理三家工厂的污水，现要在该矩形区域上（含边界），且与A、B等距离的一点O处，建造一个污水处理厂，并铺设三条排污管道AO、BO、PO．设∠BAO=x（弧度），排污管道的总长度为ykm．

（1）将y表示为x的函数；

（2）试确定O点的位置，使铺设的排污管道的总长度最短，并求总长度的最短公里数（精确到0.01km）．

阅读《元日田家》，完成下列小题。

元日田家①

薛逢

南村晴雪北村梅，树里茅檐晓尽开。蛮榼②出门儿妇去，乌龙③迎路女郎来。

相逢但祝新正寿，对举那愁暮景催。长笑士林④因宦别，一官轻是十年回。

【注】①本诗作于作者贬官四川之时。②蛮榼：酒器。③晋朝时，民俗以“龙” 字为家犬命名。后世以乌龙泛指犬。④士林：此处指读书人。

小亮调查完公园的生物种类后，将有关的生物分成了动物、植物和其它生物三类．他所采用的分类依据是（  ）