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化学与科学、技术、社会、环境密切相关。下列有关说法中错误的是   A.国庆节期间燃放的焰火的颜色是某些金属元素焰色反应所呈现出来的色彩   B.小苏打是制作馒头和面包等糕点的膨松剂，还是治疗胃酸过多的一种药剂   C.为防止中秋月饼等富脂食品因被氧化而变质，常在包装袋中放入生石灰或硅胶 阅读理解 　　Aftershock, a movie about the 1976 Tangshan earthquake, has grossed over 160 million yuan at the Chinese box office since its opening on July 22, the State Administration of Radio Film and Television(SARFT)said Monday． 　　The movie earned more than 100 million yuan within three days of its release, breaking the Chinese box office record previously held by The Founding of a Republic． 　　Aftershock set it first box office record on its release day when it earned 36.2 million yuan-the highest box office ever for a local movie on its opening day． 　　It is about a mother's three-decade journey leading to an emotional reunion with the daughter she thought she had lost in the earthquake．The Tangshan earthquake left more than 240,000 dead． 　　A survey on sina．com, one of China's major news portals(门户站点), shows nearly half of the 20,015 people surveyed said the movie was “very good and surpassed expectations”． 　　About one quarter of those surveyed said the great performances of the movie's cast moved them the most． 　　Also there was laughter during the movie's screening, especially when advertisements were inserted into the story line of the movie and given close-up shots． 　　Fifteen minutes of the movie's total length of two and a half hours were for these advertisements, which have drawn criticism from the media as well as the public． 　　In an interview with Xinhua on Monday, Zhang Hongsen, vice director of the SARFT film department said advertisements placed in moves were necessary for film makers to make profits, as piracy(盗版行为)poses a threat to their revenues(财政收入)． 　　He said a tougher crackdown on piracy was essential to solving the problem of such advertisements placed into movies． (1) What does the author want to tell us by the first three paragraphs? [　　] A． The film Aftershock earns lots of money． B． Aftershock is a successful film． C． Aftershock can match the film The Founding of a Republic． D． Aftershock broke the Chinese box office． (2) What's the attitude of audience to Aftershock? [　　] A． The film isn't good because it's beyond expectations． B． The performances of the movie are exciting． C． It's amusing because there was laughter in the movie． D． It deserves watching because it's moving． (3) What's the opinion of the audience about the ads in the film? [　　] A． It's suitable for it can adjust audience's mood． B． It's necessary for film makers to make profits． C． It's out of harmony with so good a film． D． The time is not long compared with the length of the film． (4) We can know about Aftershock from the article EXCEPT that ________． [　　] A． it's based on the 1976 Tangshan earthquake B． it deals with the reunion of a mother and her daughter after 30 years C． the mother knew that her daughter was alive long before they met D． the mother and her daughter are lucky compared to the 240,000 dead．