题目

对乙酰氨基酚，化学式C8H9NO2，通常为白色结晶性粉末，有解热镇痛作用，用于感冒发烧、关节痛、神经痛、偏头痛及手术后止痛等。请计算。（1）对乙酰氨基酚中_____（填元素符号）质量分数最大。（2）15.1g对乙酰氨基酚中含有氧元素的质量为_____g。 答案：【答案】（1）C（2）3.2【解析】（1）对乙酰氨基酚化学式为C8H9NO2，其中碳、氢、氮、氧元素的质量比为：（12×8）：9:14：（16×2）=96:9:14:32，由此可以看出碳元素质量分数最大；故答案为：C。（2）15.1g×=3.2g，所以15.1g对乙酰氨基酚中含有氧元素质量为3.2g；故答案为：3.2。To most people, noise pollution is a jet flying over their head. For one Spanish woman, it is a neighbor playing the piano. The woman has taken her neighbor to court. Now she wants to send her neighbor to prison for over seven years on the charges of psychological damage and noise pollution.In a country known for its noisiness, the case has raised eyebrows. Neighbors often complain about street noise in Spain, but people seeking prison time for someone practicing the piano is unheard of. At the trial, Sonia Bosom says she has been suffering noise pollution up to now due to the practice sessions of Laia Martin, who lives below her. Martin, 27, didn’t admit that she played at home that often, saying she took regular classes in other towns and mostly practiced at home on the weekends.On the first day of the trial, the newspaper reported that Bosom told the court she now hated pianos so much that she couldn’t even stand seeing them in a film.Bosom says years of hearing constant playing has caused her “psychological injury”. Medical reports show she has suffered from a variety of problems, including insomnia (失眠), anxiety, and panic attacks.She says tests by local authorities have found that the sound levels made by the piano are up to 10 decibels (分贝) higher than the limit. City authorities have asked the family several times to either stop the piano playing or soundproof (隔音) the room. The family told the court they carried out soundproofing work twice but the complaints continued.The court hasn’t made a final decision. A spokeswoman says the trial will end before May.1.Bosom wants to send Martin to prison because _______.A. Martin’s playing the piano damaged her healthB. Bosom suffered from heart attackC. Martin refused to take regular classes in other townsD. Martin flew a jet over her head2.How did Laia Martin respond to the complaints?A. She stopped playing the piano.B. She soundproofed the room.C. She didn’t admit she played at home.D. She took her neighbor to court.3.Which of the following may probably be the best title for the passage?A. A 7-year Sentence Caused by the PianoB. Pianist Charged with Noise PollutionC. Health Problems of a Spanish WomanD. Actions Against Noise by Local Authority