Madison Williams, aged 13, was studying in her bedroom in Dublin, Ohio. Suddenly, her mother, Leigh Williams, rushed in saying1 “A little boy fell into a septic tank（化粪池）, and no one can 2 him.”

    They ran to the neighbor's yard, where they found the boy's desperate mother and other people 3a septic tank opening that was slightly wider than a4. The boy, only 2, had slipped in.

    Madison quickly 5 the situation. She was the only one who could 6 through the small hole. Without 7she got on her stomach next to the opening, placed her8 out in front of her9 told the adults, “Lower me in.”

    Leigh and the others 10her waist and legs. She moved her arms and shoulders from side to side until she got through the 11 Inside, the tank was dark, and the air was sick. She used her hands to 12 the boy in the dirty water, and jammed her left wrist 13a hidden pole, injuring the muscles in her wrist and arm. Ignoring her14 Madison continued. Minutes ticked by before she15grasped his foot.

    Then, ten minutes after Madison had16 the tank, she and the boy were17. But the boy wasn't out of 18.He had been kept from oxygen long enough that he wasn't19. An adult gave him several hard hits on the back. It was only when Madison heard him cry that she knew he was 20 Madison's action made her a hero.

某地农业监测部门统计发现：该地区近几年的生猪收购价格每四个月会重复出现，但生猪养殖成本逐月递增．下表是今年前四个月的统计情况：

现打算从以下两个函数模型：①y=Asin（ωx+φ）+B，（A＞0，ω＞0，﹣π＜φ＜π），

②y=log₂（x+a）+b中选择适当的函数模型，分别来拟合今年生猪收购价格（元/斤）与相应月份之间的函数关系、养殖成本（元/斤）与相应月份之间的函数关系．

（1）请你选择适当的函数模型，分别求出这两个函数解析式；

（2）按照你选定的函数模型，帮助该部门分析一下，今年该地区生猪养殖户在接下来的月份里有没有可能亏损？

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1 每处错误及其修改均仅限一词；

2只允许修改10处，多者(从第11处起)不计分。

Noone can ever achieve some success without failure，asfailure can usually help us learning what our strengths and weaknesses are.

WhenI was in high school，mostof my teacher and schoolmates thought it better to study science than liberalarts，sayingthat it promised a good future.I tried to follow this trend despite the fact Iwas not good at physics.It was only two months later when I failed an extremeimportant physics exam that I realized my talent lied in subjects like Chinese，English as well as history.I hadswitched to liberal arts immediately.

Thefollowing years witnessed my excellent school performance.But failure is not soterrible as we have expected as long as we can learn something from them.

β﹣胡萝卜素（C₄₀H₅₆）是一种天然的植物色素，它广泛存在于黄绿色蔬菜和水果中，一定条件下在人体内它能够转化为维生素A（C₂₀H₃₀O）．从元素组成的角度，β﹣胡萝卜素含有　 ____　种元素；维生素A中碳、氢、氧元素的质量比为　 ____　（不用化简）．