raw and unstable form. 40 Adults between the ages of 18 and 64 get between 7 and 9 hours of sleep per day.Teenagers may need slightly more,and people over the age of 65 may need a little less. A.Avoid staying up late at weekends. B.Rest quietly for five to ten minutes. C.Sleep is important for forming stable memories. D.It is said that new memories can be hard to keep. E.They might even play a video game or watch television. F.In addition to wakeful rest,sleep is also important for learning. G.Here are two no-cost ways that can help you improve your learning.

【答案与解析】 本文主要介绍非营利组织EcoAthletes及其成员为改善气侯 环境所做的努力。 32.C根据第1段最后一句可知，该组织由多个国家的专业运动 员构成。 33.D 根据第3段第2句以及下文介绍的运动员的努力可知，该 组织创立的目的是教育和激励运动员做与气候相关行动的引 领者。 34.A根据第5段第2句可知，在地球日这天，Alena Olsen用 种特殊的方式倡导人们多参与植树活动。 35.D 本文主要讲述非营利组织EcoAthletes的成员，即一些专 业运动员为应对气候变化而做出的努力。

32.What does the text say about EcoAthletes? A.It is based on athletes'achievements. B.It is funded by the local government. C.It is made up of professional athletes. D.It is a national non-profit organization. 33.What is the purpose of EcoAthletes? A.To improve athletes'playing conditions. B.To bring athletes around the world together. C.To combine sports and personal sustainability. D.To educate and inspire athletes to lead climate action. 34.What did Alena Olsen do on Earth Day? A.She advocated planting more trees. B.She developed an app about climate.

Napheesa Collier is now a forward for the Minnesota Lynx as well as an EcoAthletes Champion.EcoAthletes is a nonprofit launched just over a year ago.In its first year,34 current and re- tired professional athletes have joined the team,from a wide range of sports and countries. Over the course of his career,Lewis Blaustein has had the opportunity to work with and interview a wide range of athletes and climate experts,gaining a unique perspective on the issue. "Some obstacles can explain why athletes wouldn't engage on cli mate,"he says."For example,when it comes to climate,ath letes worry about communicating the science poorly. To overcome these challenges,Lewis Blaustein founded

28.What can we know about floating-point representation? A.It's widely used by digital devices. B.It causes calculating errors frequently. C.It pulses thousands of times a second. D.It makes characters readable for humans. 29.In which process does a stopwatch rounding error usually happen? A.When recording the oscillations of a quartz crystal. B.When counting the times of oscillations of a quartz crys- tal, C.When transforming the final count into a floating-point representation. D.When displaying the floating-point representation number

第二节（共15小题；每小题1.5分，满分22.5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题 中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位 置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒 钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读 两遍。 听第6段材料，回答第6、7题。 6.What does the boy decide to do after school? A.Visit the girl's house. B.Listen to some songs. C.Attend a birthday party. 7.What is the video about? A.A comedy.

B.They cooked fresh dishes for Rina's mother. C.They prepared tempura broccoli in Rina's kitchen. D.They went straight to see Rina's mother in hospital. 27.What can we learn from the last paragraph? A.Chu was given an award for his deed. B.Rina's mother didn't recognize Chu at first. C.The Joneses had a dinner with Chu and his team. D.Chu refused the payment and went back with his team.

"I e-mailed back,saying,You do know that this is Vermont we're talking about,right?'"says Brandon."But Steve respon ded,'No problem.You tell us the date,time,and location and we'll be there..’” A day after receiving Brandon's e-mail,after work Chu load- ed his truck with a hot plate and a cooler filled with ingredients and then headed for Vermont with two employees.Upon reac- hing the building where Rina's mother lived,they got to work. Besides tempura broccoli,they made tofu with fresh herbs.Af- ter neatly boxing everything up,they knocked on their customer's door. "Go ahead and answer,"Brandon's wife,Rina Jones,told her mother.

21.What is the theme of the talk? A.The harm of cognitive decline. B.The approaches to mental health. C.The advice on our daily activities. D.The significance of human brains. 22.What is mainly introduced about the speaker? A.Her personal life. B.Her cautious character. C.Her major achievements. D.Her learning experiences. 23.What can a ticket holder do? A.Interact with the speaker online. B.Keep a copy of the recorded lecture. C.Email Eventbrite for identification. D.Share his/her link with someone else.

practical tips and lifestyle adjustments that can get long-term brain benefits. The Lecturer:Catharine de Lange is an award-winning jour- nalist and is Head of Features at New Scientist.Her work has been widely published including in Nature,The Observer,BBC and The Washington Post.She has worked on TV programs such as the Royal Institution Christmas Lectures,as well as radio documentaries including BBC Radio 4's Dear Professor Hawk- ing. What's included in your ticket: A ticket will cost you 5 dollars,and included in it are: OLive lecture lasting 60 minutes including Q&.A with Cath- erine de Lange;