B.A musical. C.An adventure. 听第7段材料，回答第8至10题。 8.What are the speakers talking about? A.Food. B.New Year wishes. C.An examination. 9.What is the woman? A.A senior middle school student. B.A junior middle school student. C.A senior middle school teacher. 10.What can we learn about the woman? A.She hates junk food.
Olsen is working to get her fans involved with climate ac- tion.On Earth Day,Olsen led a "Going for Green"event,which planted a tree for every workout a fan or player logged in a spe cial app.Other athletes want to make personal changes in their lives and then share how they do it with their fans. "Caring about the Earth shouldn't be a hobby,but a respon sibility that everyone recognizes as their own,"says Olsen. "Once that happens,sustainability will become a value in every day decision making and all those actions will add up.
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【答案与解析】 数字秒表可能会产生高达0.11秒的舍入误差，这足以改变势 均力敌的比赛的结果。尽管设备记录时间非常准确，但它们在将 原始数据转换为人类可读值时经常出错 28.A根据第2段最后一句可知，浮点表示法广泛应用于数码设 备。 29.D 根据第3段第1、2句可知，数字秒表的误差是在浮点表示 法的数据转换成秒表显示屏可见的数字时发生的。 30.C根据第4段画线词所在句与上一句的转折关系可知，当被 记录的时间用类似于秒表显示屏显示数字的算法传递时，他们 又看到了（第3段提到的）不精确的数字。 31.D根据倒数第2段第1句可知，为了避免秒表的舍入误差， Faux建议将石英晶振的次数直接用更大的秒表显示屏显示，而 非用算法来转换摆动次数。
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Faux says that the obvious solution is for stopwatches to have large data tables for transforming the numbers of oscilla- tions into the time in seconds,rather than using an algorithm. The researchers now hope to investigate whether the errors are found at large sporting events. New Scientist asked the International Olympic Committee if timing at the Olympic Games could be affected by this phenome- non.The IOC passed the request for comment to Omega,the of ficial timekeeper of the Games,which didn't respond.
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Digital stopwatches can make rounding(四舍五入的)errors of up to 0.11 seconds,which could be enough to change the win- ner of close races.Although the devices record time extremely accurately,they often make errors when changing that raw data to human-readable numbers. Most digital stopwatches measure time by counting the pre dictable oscillations (of a quartz crystal.The crystal will pulse many thousands of times a second and the final count is transformed into seconds in a format known as a floating-point representation that is commonly used by digital devices. This floating-point number is extremely accurate,but must be transformed again for display on the limited screen of a stop-
高一期末高中教学质量检测英语)
24.Why did Brandon Jones email Ekiben restaurant? A.To get a recipe. B.To ask for a dish. C.To recommend a cook. D.To apply for a position. 25.How did Brandon Jones feel the moment he received the first reply? A.Sad. B.Content. C.Astonished. D.Disappointed. 26.What did Chu and his coworkers do in Vermont? A.They expressed gratitude to Rina's mother.
B The e-mail request came in to Ekiben restaurant in Balti- more,Maryland one afternoon:tempura broccoli(面拖花椰菜). The man who sent the e-mail was writing on behalf of his moth- er-in-law,who loved the dish very much.He explained she was now in the final stages of lung cancer at her home in Vermont and that he was hoping to be told how to cook the dish so that he could make it for her. Steve Chu,one of the restaurant's co-owners,read the e- mail and quickly replied with an alternative suggestion."Thanks for reaching out,he wrote."We'd like to meet you in Vermont and make it fresh for you. Brandon Jones,the son-in-law,thought it was unexpected.
OOn-demand access to a recording of the lecture for 12 months Booking information: OEventbrite will email you a confirmation immediately after purchase.You'll receive a separate email with a link to access the event auditorium (before the event;please note that each link is unique.The event auditorium will also provide access to the other items included in your ticket. OWe reserve the right to alter the event and its line-up,or cancel the event.In the unlikely event of cancellation,all tickets will be fully refunded. OTickets are only available in advance through Eventbrite. To ensure your place we recommend you book in advance.
第二部分 阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出 最佳选项。 A Your Are Welcome To Our Online Talk:Brain Power! Time:6-7 pm Thursday,3rd February Theme:This talk is about the latest science on brain health, including what we know about preventing cognitive (de- cline as we get older and what we can do about improving our mental well-being today.The speaker will unpack the latest un- derstanding on the way that sleep,diet,exercise and our social lives are essential for maintaining our grey matter and will share
高一期末高中教学质量检测b地理考试试卷答案)
