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2—氨基—3,5—二溴二苯甲酮广泛用于合成医药、漂白剂、杀菌剂、防蛀剂和除草剂等。可通过如下合成路线制备：  且氨基（—NH2）极易被氧化 （1）B的化学名称为                         ；C的结构简式为                   ；      D的核磁共振氢谱有          个峰；E→F的反应类型为                    。 （2）A→B的化学方程式为                              ；反应类型为             In recent years, a number of Chinese technological innovations (科技创新) have been making waves around the world. Among them, four stand out. They are known as "four new great inventions of modern China. They have made our daily lives more convenient.High-speed trainsChina created its first high-speed railway line in 2008. Since then, the number of passenger trips has grown by over 30 percent every year. By 2016, more than 5 billion trips had been taken on China's bullet trains(高铁), according to Xinhua News Agency.China is currently working on the next-generation bullet trains that will have a top speed of 400kilometers per hour. By 2020, one-fifth of the country's 150, 000-km railway network will be used by high-speed trains. This network will link more than 80 percent of major cities across China, said Xinhua.Mobile paymentMobile payment is turning China into a "cashless society" led by the third-party payment companies like Alipay. For example, instead of paying by cash, customers now pay for goods simply by typing a short password into Alipay app on their mobile devices.Users can also pay their bills through Alipay, such as their water and electricity bills. Alipay also supports cross-border(跨境的)online and in-store payment, which allows users to buy things on international websites and apps.Shared bikesShared bike services started in Western countries. But China has surprised the world with howquickly it has adopted dockless(无柱的) shared bikes.Unlike traditional bike-sharing method, dockless bikes allow users to simply pick up or park abike on the street through GPS and smartphone app.To unlock a bike, you just need to scan a QR code on a shared bike with a smartphone app. After you finish riding, you can park it at available parking areas, lock it and pay for ride throughmobile payment services.Online shoppingWith around 751 million internet users, China has been the world's largest and fastest-growing line shopping market.Online shopping now accounts for 15. 5 percent of total retail sales in China, according to Xinhua. Thanks to lower costs and fewer licensing requirements(执照要求), it's easier for sellersto open an online shop in China than a brick-and- mortar shop(实体店).It also helped to create jobs of rural areas. In 2016, online shopping created more than 20 million jobs in rural areas, with over 8. 1 million running their own online shops, said Xinhua.1.What is known as "four new great inventions" of modern China?A. GPS, Smartphone apps, High-speed trains and Online shopping.B. Mobile payment, Shared bikes, Online shopping and High-speed railway networkC. Online shopping, Short password, High-speed railway network and Mobile paymentD. High-speed trains, Mobile payment, Shared bikes and Online shopping2.According to the passage, which of the following is TRUE?A. After you use shared hikes you can nark them everywhereB. When users pay their water and electricity bills, they only pay them by cashC. By 2020, China's 30, 000-km railway network will be used by high-speed trains.D. It easier for sellers to open a brick-and-mortar shop than an online shop in China.3.The underlined phrase“ accounts for” means______ in Chinese.A. 占……比例 B. 是……原因 C. 给……解释 D. 出……单据4.From this passage, the writer mostly wants to tell us that_________.A. Nowadays China has become the most developed country in the worldB. Nowadays China has made much great progress in both science and technologyC. Nowadays China is stronger than any other country in the worldD. Nowadays only China can make a great contribution (贡献)to human