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课时作业(三十二)　UNIT 1　SCIENCE FICTION 一、阅读理解 (2022·浙江嘉兴高考二模模拟)A new study published on Monday in the journal Pediatrics points out that many YouTube channels are targeting young children with thinly veiled (掩饰的) ads for junk food. The study analyzed over 400 YouTube videos featuring so­called kid influencers—children with large social media followings. The study found about 90 percent of the foods in the YouTube videos were unhealthy items decorated with fast food logos. A spokeswoman for YouTube said the company has “invested significantly in the creation of the YouTube Kids app, a destination made specifically for kids to explore their imagination and curiosity on a range of topics, such as healthy habits.” She added, “We don't allow paid promotional content and have clear guidelines restricting categories like food from advertising on the app.” However, studies show that young children are unable to distinguish between commercials and cartoons and are more likely to prefer unhealthy foods after seeing advertisements for them. Experts say it is not just an advertising issue but a public health concern. Childhood obesity rates have skyrocketed in recent years: Nearly 20 percent of American children between the ages of 2 and 19 are obese, up from 5.5 percent in the mid 1970s. Marie Bragg, an assistant professor of public health and nutrition was prompted to study the phenomenon after she noticed her young kids obsessively (着迷地) watching YouTube videos of “kidfluencers” like Ryan Kaii, the 9­year­old star of Ryan's World, a YouTube channel with 27 million subscribers. The channel, run by Ryan's parents, features thousands of videos of him excitedly reviewing new toys and games and going on fun trips to stores. “These videos are unbelievably powerful，” said Josh Golin, the executive director of the Campaign for a Commercial­Free Childhood. “Very busy parents may take a look at them and think that it's just a cute kid talking enthusiastically about some product and n