【正文】 hear a pin(大頭針)drop as he opened the paper with the winner’s name, “Deepika Kurup!”　　As an America’s Top Young Scientist, I was given an opportunity to show my invention on national television and deliver several presentations. One of the most important things I have learned is that munication and teamwork are the key to success. 【文章大意】本文是一篇記敘文, 講述了作者通過一次去印度的經(jīng)歷, 發(fā)現(xiàn)人們?nèi)狈η鍧嵥? 就此得到啟發(fā), 回國(guó)后與Jim Jonza博士合作, 開發(fā)了一個(gè)利用太陽能的凈水系統(tǒng)。故畫線詞implementing是“應(yīng)用”的意思。B　　Recently, the most heated topic of “which is the right bin for my garbage” has swept China. Shanghai is among China’s first cities to introduce garbage classification (垃圾分類) and also the country’s most serious in its performing. Since July 1, 2019, Shanghai residents have been required by law to sort garbage into four different categories, or they could face fines. Individuals, including tourists, can be fined 200 yuan for failing to sort their waste properly, while panies and institutions can be fined up to 50, 000 yuan. The government has set up online apps to handle sorting questions, and announced guidelines to address the “onesizefitsall” method. The country is about to invest over 21 billion yuan in the construction of garbage processing facilities to meet demands. Now it’s introducing artificial intelligence into its waste management system, by setting up little cameras in many sets of bins. However, not every face can be recognized by the smart dustbin until you register for the system. Once registration is pleted, users will scan a QR code on the bin, which then opens it up to allow for garbage disposal (處理). Now, each household gets one special QR code for throwing out waste. Here, the intelligent bins don’t just calculate garbage weight。注冊(cè)完成后, 用戶將掃描垃圾桶上的二維碼, 然后打開垃圾桶進(jìn)行垃圾處理。)中的畫線詞的意思是“努力”?！庇纱伺袛喑? 我國(guó)要推行強(qiáng)制垃圾分類是為了促進(jìn)環(huán)境的可持續(xù)發(fā)展。1. 【解析】選B。)切題?！背薪由舷挛? F項(xiàng)Chinese panies, including exporters, have seen an increase in cancellations of orders. (包括出口商在內(nèi)的中國(guó)企業(yè)取消訂單的情況有所增加。故選A。閱讀理解　　The idea of changing the world seems very crazy, but there are a number of small everyday things we can do to make the world better. Community centers, parks, libraries, homeless shelters (避難所), hospitals and schools are all places where students can make a difference through service. Alisia Orosco, 10, wanted to show her love and care to the sick kids at University Children’s Hospital in Texas, where her brother had been a patient. She earned money by doing parttime jobs and used it to buy different toys for the children in hospital. Now she visits three hospitals every year with bags of toys. “I hope to help as many kids as I can, ” Alisia says. “It makes me happy to make them smile. ”High school students in a town of Washington made a difference in the lives of some needy children by building a playground at a workers’ camp. They got a lot of help from a building supply store which provided free building materials for the project. 2. Which of the following can best describe the students mentioned in the text?A. Kind. 　　　　　　　 B. Brave. C. Proud. D. Honest. 【解析】選