先化简，再求值：（+）÷，其中x是方程x2﹣3x+2＝0的解．

• 萌宠菠菠乐园
• 2024-09-22 04:09

某个“清涼小屋”自动售货机出售A、B、C三种饮料．A、B、C三种饮料的单价分別是2元/瓶、3元/瓶、5元/瓶．工作日期间，每天上货量是固定的，且能全部售出，其中，A饮科的数量（单位：瓶）是B饮料数量的2倍，B饮料的数量（单位：瓶）是C饮料数量的2倍．某个周六，A、B、C三种饮料的上货量分別比一个工作日的上货量增加了50%、60%、50%，且全部售出．但是由于软件bug，发生了一起错单（即消费者按某种饮料一瓶的价格投币，但是取得了另一种饮料1瓶），结果这个周六的销售收入比一个工作日的销售收入多了503元．则这个“清凉小屋”自动售货机一个工作日的销售收入是　 　元．

解：设工作日期间C饮料数量为x瓶，则B饮料数量为2x瓶，A饮料数量为4x瓶，

工作日期间一天的销售收入为：8x+6x+5x＝19x元，

周六C饮料数量为1.5x瓶，则B饮料数量为3.2x瓶，A饮料数量为6x瓶，

周六销售销售收入为：12x+9.6x+7.5x＝29.1x元，

周六销售收入与工作日期间一天销售收入的差为：29.1x﹣19x＝10.1x元，

由于发生一起错单，收入的差为503元，因此，503加减一瓶饮料的差价一定是10.1的整数倍，

所以这起错单发生在B、C饮料上（B、C一瓶的差价为2元），且是消费者付B饮料的钱，取走的是C饮料；

于是有：10.1x﹣（5﹣3）＝503

解得：x＝50

工作日期间一天的销售收入为：19×50＝950元，

故答案为：950

计算： （1）（x+2y）（x﹣2y）+4（x+y）2 （2）（+a﹣1）÷

解：（1）（x+2y）（x﹣2y）+4（x+y）2 ＝x2﹣4y2+4（x+y）2 ＝x2﹣4y2+4（x2+2xy+y2） ＝x2﹣4y2+4x2+8xy+4y2 ＝5x2+8xy （2）（[8bd10d4868419b51adcc24785d9398af.png]+a﹣1）÷[25781708eaeb420525106a0eae7cf8b7.png] ＝[[867842ed9f80454d9ea84fff7ac660af.png][a7533ef7b9f430197c443c736efb1ade.png]÷[d8ce3f712fddc1094e5d612c79464eb7.png] ＝[b0d04dfa25450f081c6c02c5ced971c6.png]÷[8658282e6a19e802aba4247ca9993d07.png] ＝[8ce0576943d971fe1452bbc4e1a164dd.png]÷[3722f7a559d7b1431aa793be1a8c5284.png] ＝[6813ff57210f005295311ab4ceec2fd5.png]×[cc24c7764c54067188aed3ad67fb2941.png] ＝[ac920f822bd5b3a3823bf1253726021c.png]．

Science camps for kids

Destination Science Young Inventors

Curious minds want to know and build. Experiment & discover the technology behind controls that operate inventions： touch, sound and motion sensors. Take home a robot dog that barks, eats, and sits at your command. Invent flipping friction racers, magnetic quiz games, 3D water﹣powered polymers and more.

Price

OptionsEarly Bird PriceRegular Price

1st & 2nd Grade﹩350﹩370.00

3rd﹣5th Grade﹩410﹩430.00

Early bird price ends

Mar 15, 2019

Schmahl Science Physics of Motion（运动）

The physics of motion is all about forces. Forces need to act upon an object to get it moving, or to change its motion. In the tradition of Da Vinci, Galileo and Newton, students will explore forces as they build gliders and airplanes, design submarines, build rockets, learn about light, make roller coasters and build bridges.

Price

Early Bird PriceRegular Price

3rd﹣5th Grade﹩475.00﹩500.00

Early bird price ends

Mar 15, 2019

Mad Science

Junior Mad Scientists explore the kingdom of the Chemical and Physical world in this crazy week of non﹣stop action! Kids explore our wonder lab and find eggs that don't break, ice that doesn't melt, and discover how to freeze time! Our young chemists perform impressive hands﹣on experiments.

Price

OptionsEarly Bird PriceRegular Price

1st & 2nd Grade﹩338﹩358.00

3rd﹣5th Grade﹩395﹩420.00

Early bird price ends

Mar 12, 2019

（1）Jenny is a second grader and fond of pets. Which camp is suitable for her?　 　

A. Mad Science

B. Destination Science Young Inventors

C. Schmahl Science Physics of Motion

D. All of the above

（2）What can kids do in Mad Science?　 　

A.Build a rocket.

B. Learn something about ice.

C. Invent a racer.

D. Design a robot.

（3）What is the lowest price for Tom, who is a 3rd grader and wants to register（注册） a camp on

March 13, 2019?　 　

A. ﹩395.

B. ﹩420.

C. ﹩410.

D. ﹩475.

1.B.细节题.根据文章Destination Science Young Inventors介绍内容,Curious minds want to know and build. Experiment & discover the technology behind controls that operate inventions： touch, sound and motion sensors. Take home a robot dog that barks, eats, and sits at your command.好奇的人想知道为什么和自己动手建立事物.实验和发现操纵发明的控制装置背后的技术：触摸、声音和运动传感器.带回家一只机器人狗,它会吠叫、进食,并听从你的指令.由此可知,对宠物感兴趣的二年级学生Jenny应该去参加Destination Science Young Inventors,结合选项,故选B.

2.B.细节题.根据文章Mad Science介绍内容,Kids explore our wonder lab and find eggs that don't break, ice that doesn't melt, and discover how to freeze time!孩子们探索我们的神奇实验室,找到不破裂的鸡蛋,不融化的冰,并发现如何冻结时间！结合选项,故选B.

3.C.细节题.根据文章内容,3rd﹣5th Grade﹩410﹩430.00﹣﹣Mar 15, 2019；3rd﹣5th Grade﹩475.00﹩500.00﹣﹣Mar 15, 2019；由此可知,适合3年级的Tom的最低价位的学科营应付费410美元,结合选项,故选C.

Four years ago, we asked ourselves： what if we could create a shopping experience with no waiting in lines and no checkout? Or could we create a physical store where customers could simply take what they want and go? Our answer to those questions is Amazon Go, where you could experience the idea of "just walk out shopping".

Amazon Go is a new kind of store with no checkout required. We created the world′s most advanced shopping technology, so you never have to wait in line. With our "just walk out shopping" experience, simply use the Amazon Go app to enter the store, take the products you want, and go! No lines, no checkout.

Our checkout﹣free shopping experience is made possible by the same types of technologies used in self﹣driving cars： computer vision, sensor fusion, and deep learning. Our "just walk out technology" automatically detects when products are taken from or returned to the shelves and keeps track of them in your virtual cart. When you9re done shopping, you can just leave the store. Shortly after, we′ll charge your Amazon account and send you a receipt.

We offer delicious ready﹣to﹣eat breakfast, lunch, dinner, and snack options made fresh every day by our on﹣site chefs and favorite local kitchens and bakeries. Our selection of foodstuff ranges from bread and milk to cheeses and locally made chocolates. Yoifll find well﹣known brands we love, plus special finds we′re excited to introduce to customers. For a quick home﹣cooked dinner, pick up one of our chef﹣designed Amazon Meal Kits, and you can make a meal for two in about 30 minutes.

Our 1,800﹣square﹣foot shopping space is conveniently compact（紧凑的）,so busy customers can get in and out fast. It is located at 2131, 7th Ave, Seattle, WA, on the corner of 7th Avenue and Blanchard Street. All you need is an Amazon account, a supported smartphone, and the free Amazon Go app.

Amazon Go is currently only open to Amazon employees in our testing program, and will be open to the public soon.

（1）From the passage, we can learn that Amazon Go　 　.

A. is a checkout﹣free store

B. sells all kinds of goods

C. is open to the public

D. uses unknown technologies

（2）What is mainly discussed in Paragraph 3?　 　

A. When Amazon Go charges.

B. How Amazon Go works.

C. Where Amazon Go lies.

D. What Amazon Go sells.

（3）Customers pay for the products from Amazon Go by　 　.

A. paying cash at the counter

B. walking out of the store

C. using their Amazon accounts

D. scanning smartphones when leaving

（4）The main purpose of the passage is to　 　.

A. encourage people to shop online

B. advise people to work for Amazon

C. inform people of a new concept store

D. tell people of the shopping experience

1.A.细节理解题.根据第二段Amazon Go is a new kind of store with no checkout required.We created the world's most advanced shopping technology,so you never have to wait in line亚马逊Go是一种新的商店,不需要结账.我们创造了世界上最先进的购物技术,所以你永远不必排队等候.可知,这是一种不需要结账的商店；故选A.

2.B.段落大意题.根据第三段Our checkout﹣free shopping experience is made possible by the same types of technologies used in self﹣driving cars：computer vision,sensor fusion,and deep learning我们通过与自动驾驶汽车相同类型的技术实现我们的无结账购物体验：计算机视觉,传感器融合和深度学习.可知,主要讲的是商店是如何运作的；故选B.

3.C.细节理解题.根据第三段Shortly after,we'll charge your Amazon account and send you a receipt不久之后,我们将向您的亚马逊帐户收取费用并向您发送收据.可知,顾客通过他的亚马逊账号支付他购买的商品；故选C.

4.C.推理判断题.根据最后一段Amazon Go is currently only open to Amazon employees in our testing program,and will be open to the public soonAmazon Go目前仅在我们的测试计划中向亚马逊员工开放,并将很快向公众开放.可知,文章主要是为了告诉人们一个新的商店概念；故选C.

Do you find it difficult to put down your mobile phone?

If yes, you're not alone. These days, many people suffer from the stress of FOMO （fear of missing out）. They reach for their mobile phones when they wake up in the morning, and for the rest of the day, they constantly scroll down （向下滚动）the timelines of their social media apps to get the latest updates.

Despite the convenience smartphones bring, many people struggle with their digital habits.

As Sameer Samat, US tech Company Google′s vice president of product management, said in his speech at the 2018 Google I/O developer conference on May 8, 70 percent of people don't want to spend so much time on their phones.

This is why during the conference Google introduced an app called Dashboard for the new version （版本）of its Android operating system. This new app includes well﹣being functions that aim to help u sers manage the time they spend on their digital devices.

It all starts with a bird′s﹣eye view. Dashboard allows users to look at all the details of their phone habits. For example, a user can see how many times they′ve unlocked their phone and how many times they′ve checked their social media apps, as well as how much time they spend on each app every day.

Once the users see this information, they'll be able to make some dianges. With the App Timer function, users can set a time limit for how long they can use each app for every day. After they've hit the limit, they won't be able to launch the app until the next day.

But even if users become more mindful of their usage, they're still likely to be drawn in by notifications （通知）.This is where the Shush feature comes in. It automatically （自动地）silences incoming calls and notifications when a user puts their phone face down.

If people truly want to make full use of their free time instead of losing hours using their smart phones, these new functions are just one way of doing that.

After all, who needs to use an app to stop you from using other apps when the easiest answer would be just to use your willpower?

（1）Who are the target users of Dashboard?　 　

A. People who know little about smartphones.

B. People who have trouble dealing with stress.

C. People who are slow at searching for things online.

D. People who wish to manage the time they spend on their smartphone.

（2）What can Dashboard do?　 　

A.Lock the phone at a certain time.

B. Limit some apps to certain users.

C. Limit the time certain apps can be used.

D. Silence app notifications at night.

（3）The underlined word "mindful" in Paragraph 8 is closest in meaning to　 　.

A.serious.

B. careful.

C. prepared.

D. creative.

（4）What does the author think of Dashboard?　 　

A. It's not very useful.

B. It's perfectly designed.

C. It should include more functions.

D. It may be helpful to some people.

1.D.细节理解题.根据第三段This new app includes well﹣being functions that aim to help users manage the time they spend on their digital devices.可知,Dashboard的目标人群是那些想要管理他们在手机上花费的时间的人.故选D.

2.C.细节理解题.根据第五段With the App Timer function, users can set a time limit for how long they can use each app for every day.可知,Dashboard可以限制某些应用程序每天的使用时间.故选C.

3.B.猜测词义题.根据文章第六段内容,But even if users become more mindful of their usage, they're still likely to be drawn in by notification（通知）.：但是即使用户更加注意他们的使用,他们仍然有可能由于通知而被吸引到手机上来.也就是再怎么小心也避免不了看手机.此处的"still"是一个很好的提示,所以可以猜测出划线词mindful是B项careful（小心的）的意思.故选B.

4.D.推理判断题.根据文章最后两段If people truly want to make full use of their free time instead of losing hours using their smart phones, these new functions are just one way of doing that.The easiest answer would be just to use your willpower.可知,人们要想真正控制自己使用手机的时间,这个新的应用程度Dashboard只是一种方法而已,更多的是要靠个人的意志力.所以可以推断出作者认为Dashboard只是对一些人有帮助,意志力不强的人仍然无效.故选D.

Whenever something looks interesting or beautiful, there's a natural impulse（冲动）to want to own and preserve it ﹣ which means, in this day and age, that we're likely to reach for our phones to take a picture.

Though this would seem to be an ideal solution, there are two big problems associated with taking pictures. Firstly, we're likely to be so busy taking the pictures that we forget to look at the world whose beauty and interest drove us to take a photograph in the first place. And secondly, because we feel the pictures are safely stored on our phones, we never get around to looking at them, so sure are we that we'll get around to it one day.

These problems were noticed right at the beginning of the history of photography, when the average camera was the size of a grandfather clock. The first person to notice them was the English art critic, John Ruskin. He was a traveler who realized that most tourists make a boring job of noticing or remembering the beautiful things they see. He argued that humans have a natural tendency to respond to beauty and wish to have it, but that there are better and worse expressions of this desire. At worst, we get into buying souvenirs or taking photographs. But, in Ruskin's eyes, there's one thing we should do and that is attempt to draw the interesting things we see, no matter whether we have any talent for doing so.

Ruskin was very upset by how seldom people notice details. He strongly disliked the travelers who prided themselves on covering Europe in a week by train. "If he be truly a man, no harm to go slow； for his glory is not at all in going, but in being."

（1）People are eager to take pictures at seeing something beautiful because　 　.

A. it's human's born desire of owning

B. it's convenient to do so with a mobile phone

C. they are used to hurrying for everything

D. they cannot wait to share it with friends

（2）When taking pictures, people may　 　.

A.find a good way to store good memories in their minds

B.feel it hard to learn the skills of taking good photos

C.ignore appreciating something attractive on the spot

D.have chances to meet the challenge of new technology

（3）According to the last paragraph, travelling people are usually proud of　 　.

A.the long distance that they have covered

B.the happy hours that they have gone through

C.the advanced transport tool that they have taken

D.the great convenience that they have been offered

（4）We can conclude that Rustin attached importance to　 　.

A. travelling around the world

B. taking beautiful photos with a camera

C.taking photos instead of painting pictures

D. admiring the world's beauty attentively

1.A.推理判断题.根据第一段Whenever something looks interesting or beautiful, there's a natural impulse（冲动） to want to own and preserve it ﹣ which means, in this day and age, that we're likely to reach for our phones to take a picture."无论什么东西看起来有趣或美丽,人们都有一种自然的冲动,想要拥有并保存它﹣﹣这意味着,在这个时代,我们很可能会拿起手机拍照."可知,人们渴望看到美丽的事物时拍照,因为这是人类与生俱来的拥有欲望.故选A.

2.C.细节理解题.根据句第二段中we're likely to be so busy taking the pictures that we forget to look at the world whose beauty and interest drove us to take a photograph in the first place."我们很可能忙于拍照,以至于忘记了去看这个世界,而正是这个世界的美丽和兴趣驱使我们去拍照."可知,拍照时,人们可能会忽略欣赏一些有吸引力的东西.故选C.

3.A.细节理解题.根据最后一段中He strongly disliked the travelers who prided themselves on covering Europe in a week by train."他非常不喜欢那些以在一周内乘火车游览欧洲而自豪的旅行者."可知,根据最后一段,人们通常都以他们已经走完的长途旅行而自豪.故选A.

4.D.推理判断题.根据最后一段中He strongly disliked the travelers who prided themselves on covering Europe in a week by train. "If he be truly a man, no harm to go slow； for his glory is not at all in going, but in being."" 他非常不喜欢那些以在一周内乘火车游览欧洲而自豪的旅行者."如果他是一个真正的人,走得慢没有害处；因为他的荣耀不在乎去、只在乎活着."由此可知,我们可以得出结论,Rustin重视用心欣赏世界的美丽.故选D.

In our daily life, some people prefer to hold on to the past and play it again and again like a broken record. （1）　 　. However, those with no regrets let go of the past and live joyfully at present. They also live by the following principles.

1. Following your unique path leads to greater achievements.

We all have passions and inner guidance. If you follow your passions and inner guidance, your life will take on deeper meaning and fulfillment. （2）　 　.

2. Let your interest guide you, not societal pressures.

We all know the feeling of being interested about something. （3）　 　. But too often we allow societal pressures to control our feeling. To check whether your interest is guiding your life, start doing what you want to.

3. Understanding happiness is a choice.

We often think we will be happy once we get that job, or finish that course. （4）　 　. Everything outside of you is temporary（暂时的）. Once it goes, so will your happiness.

4. （5）　 　.

We support others by our words and actions, while receiving others' support and love back. Expressing heartfelt feelings allows us to have no regrets for whatever tomorrow may bring. It may also be exactly what others need to face their current challenges.

A. Don't think twice about expressing love and appreciation

B. Try living according to what your inner knowing guides you to do

C. What is right for one person may not be right for another

D. They, in turn, live with regret, anger, and fear

E. Don't settle for less than what you want

F. The truth is that happiness comes from within

G. It guides what we are doing

1.D. 推理判断题.上文提示"在我们的日常生活中,有些人喜欢抓住过去,像一张破唱片一样一遍又一遍地播放."承接上文,D项 They, in turn, live with regret, anger, and fear.（反过来,他们生活在悔恨、愤怒和恐惧之中.）切题.D项中的in turn"反过来"上下句构成一种转折.故选D.

2.B. 推理判断题.上文提示"如果你追随自己的激情和内心的指引,你的生活会有更深刻的意义和成就感."承接上文,B项Try living according to what your inner knowing guides you to do（试着按照你内心的直觉去生活）切题.故选B.

3.G. 推理判断题.上文提示"我们都知道对某事感兴趣的感觉."承接上文,G项It guides what we are doing（它指导我们做什么）切题.该项中的it指上句中的the feeling of being interested about something,故选G.

4.F. 推理判断题.上文提示"我们常常认为,一旦我们得到那份工作,或完成那门课程,我们就会快乐."承接上文,F项The truth is that happiness comes from within（事实上,幸福来自内心）切题.故选F.

5.A. 推理判断题.此空是小标题.结合本段第一句We support others by our words and actions, while receiving others' support and love back."我们用言语和行动来支持别人,同时也得到别人的支持和爱."由此推知本段小标题是A项Don't think twice about expressing love and appreciation（在表达爱和感激时不要再三考虑）切题.故选A.

I lost my sight when I was four years old by falling off a car and hurting my head. Now I am thirtytwo. I can vaguely remember the brightness of （1）　 　and what colour red is. It would be（2）　 　to see again, but a（n） （3）　 　can do strange things to people. I don't mean I would （4）　 　to go without my eyes. I simply mean that the loss of them made me appreciate more what I had （5）　 　.

My parents and my teachers saw something in me﹣a （6）　 　to live﹣which I didn't see, and they made me want to stir it up with （7）　 　.

The （8）　 　lesson I had to learn was to believe in myself.I am not talking about simply the kind of （9）　 　that helps me down an unfamiliar staircase alone. I （10）　 　something bigger than that：a confidence that I am, despite being （11）　 　, a real, positive person；that there is a special place where I can make myself fit.

It took me years to discover and strengthen this confidence.It had to start with the easy and simple things. （12）　 　a man gave me an indoor baseball. I thought he was laughing at me and I was （13）　 　."I can't use this,"I said."Take with you,"he urged me,"and roll it around."The words （14）　 　in my mind."Roll it around！"By rolling the ball I could （15）　 　where it went. This gave me an idea how to achieve a goal I had thought （16）　 　before：playing baseball. At Philadelphia's Overbrook School for the blind I （17）　 　a successful variation of baseball. We called it ground ball.

I have set ahead of me a series of goals and then tried to reach them, one at a time. I had to be clear about my （18）　 　. It was no good trying for something that I knew at the start was （19）　 　out of reach because that only brought bitterness of failure. I would fail anyway, （20）　 　on the average I made progress.

（1）A. sky B. cloud C. sunshine D. mist

（2）A. helpful B. wonderful C. hopeful D. successful

（3）A. disaster B. environment C. incident D. wonder

（4）A. manage B. try C. want D. prefer

（5）A. lost B. left C. used D. cared

（6）A. purpose B. potential C. pressure D. preparation

（7）A. energy B. happiness C. luck D. blindness

（8）A. hardest B. dullest C. simplest D. easiest

（9）A. self﹣respect B. self﹣control C. self﹣confidence D. self﹣defence

（10）A. think B. consider C. guess D. mean

（11）A. imperfect B. perfect C. unfair D. fair

（12）A. Later B. Soon C. Once D. Then

（13）A. worried B. encouraged C. shocked D. hurt

（14）A. stuck B. impressed C. occupied D. held

（15）A. see B. hear C. notice D. observe

（16）A. important B. unimportant C. possible D. impossible

（17）A. invented B. discovered C. instructed D. directed

（18）A. experience B. advantages C. knowledge D. limitations

（19）A. hardly B. wildly C. highly D. deeply

（20）A. so B. for C. but D. and

CBADB BDACD ACDAB DADBC

1.C.名词辨析.A.天空；B. 云；C. 阳光；D. 薄雾.根据空前the brightness of可以推测"明亮"应该是阳光的特点,也就是失明的作者模糊记得的是阳光的明媚,其他不合情理,答案选C.

2.B.形容词辨析.A. 有帮助的；B. 精彩的,极好的；C. 希望的；D. 成功的.从情理判断失明的人如果能重新看到阳光,看到艳丽的色彩会是非常美好的事情,所以答案选B.

3.A.名词辨析.A.灾难；B. 环境；C.事变,事件；D. 奇迹.根据上文I lost my sight when I was four years old by falling off a car可知失明对一个人来说是一场灾难,其他选项不合语境,答案选A.

4.D.动词辨析.A. 管理；B. 尝试；C. 想要；D.更喜欢.上文作者提到重新看到光明当然很好,但是有时候灾难会使人做到意想不到的事情,是说失明给他带来的好处,所以此处作者要对上文的话进行解释,句意：我不是指我喜欢没有我的双眼,答案选D.

5.B.动词辨析.A.丢失；B. 剩下；C. 使用；D. 在意.从上下文可知作者在失明后充分发挥了自己的潜质,发挥了其他感官的能力,所以答案选B.

6.B.名词辨析.A. 目的；B. 潜力； C.压力；D. 准备.根据破折号后的解释which I didn't see,可知这是作者没意识到的能生存下去的潜质,答案选B.

7.D.名词辨析.A. 能量；B. 快乐； C. 运气；D.失明.从上文可知作者失去了视力,所以他要与之挣扎斗争的是"失明"这一事实,句意：他们使我想要与失明做斗争.

8.A.形容词辨析.A. 最难； B.最傻；C. 最简单；D. 最容易.由情理可知有残疾的人往往会有自卑感,会失去对生活的信心,所以说找到自信应该是最难做到的,答案选A.

9.C.名词辨析.A. self﹣respect；B. self﹣control；C. self﹣confidence；D. self﹣defence.根据上文I had to learn was to believe in myself以及下文中的. a confidence that I am可以判断此处指自信,答案选C.

10.D.动词辨析.A. 思考；B. 认为； C. 猜想；D. 意思是.根据前句I am not talking about ….可以判断此处作者是对上文self﹣confidence的解释, 所以用mean"",答案选D.

11.A.形容词辨析.A. 不完美；B.完美；C. 不公平；D. 公平.根据上文可知作者小时候失明,所以在身体上应该是有缺陷的,答案选A.

12.C.副词辨析.A. 后来；B. 不久；C. 从前；D. 然后.从文章语境可知此处是作者对过去事情的回忆,所以指"一次",选C.

13.D.动词辨析.A. 担忧；B. 鼓励；C. 震动；D. 伤害.由上文I thought he was laughing at me可以判断作者受到刺激,感觉心理受到伤害,hurt指 "感情,心灵受到伤害"选D.

14.A.动词辨析.A. 击,印象； B.印象,烙印； C. 占据； D. 抓住.固定短语stick in one's mind /head"铭记在心,经久不忘",根据下文内容可知作者听从了那个人的话,玩起了室内棒球, 所以答案选A.

15.B.动词辨析.A. 看见；B. 听见；C. 注意；D. 观察.作者是个盲人,所以判断球滚动的方向应该不能靠视觉,排除A、C、D选项,答案选B.句意：通过滚动球我能听到它去的方向.

16.D.形容词辨析.A. 重要的； B.不重要的；C. 可能的；D. 不可能的.从上文可知作者从来没想过去玩棒球,也认为自己玩不了棒球,所以当别人送给他球玩的时候,他会感觉很受刺激,由此判断他认为那是不可能的,选D.

17.A.动词辨析.A. 发明；B. 发现；C. 说明；D. 决定.从下句We called it ground ball.,可知作者是通过对棒球做出变通,发明了"ground ball.",所以答案选A.

18.D.名词辨析.A. 经历；B. 优势；C. 知识；D. 限制.由下文It was no good crying for something that I knew at the start was ____ out of reach可以判断作者很清楚地知道自己身体的缺陷,所以在制定目标时会考虑到自己的局限性,选D.

19.B.副词辨析.A. 几乎不；B. 粗野地；极其,非常；C. 高地；D. 深地.根据语境可知作者很理智地制定目标,不会让制定的目标超出自己的能力许多,答案选B.

20.C.连词辨析.A.所以； B.为了；C.但是；D. 和.根据前句I would fail something anyway和后句I made progress.的可知前后句意相反,所以选C.

Everybody, welcome to （1）　 　（we）company. I am Luisa, Director of the department. Let me say something to you all. The starting of work can be exciting on the hand, and can also be （2）　 　（worry） on the other. No matter what your future job is, you will have to work with others.

Leaning to get on well with others must come first, （3）　 　（include） all staff in the company and our （4）　 　（custom）

And secondly, right after my introduction, spend some time reading the introduction of our company and get to know the people in your office and find out （5）　 　the company is like.

This afternoon you can walk around our workshops and know （6）　 　（much）about the products.

No one is allowed （7）　 　（leave）the company before 5：30 pm. By the way, lunchtime

（8）　 　（come）at 11：50 and ifs free （9）　 　charge.

Remember： Learning is so important（10）　 　it can change your future life.

This is what I′d like to say to you at the moment. If you still have any question, please come to my office.Thank you.

1.our.考查代词,欢迎来我们的公司,修饰名词使用形容词性物主代词,故填our.

2.worrying.考查形容词,worrying：令人担心的,修饰物,故填worrying.

3.including.考查介词,包括所有的公司员工,故填including.

4.customers.考查名词,以及我们的顾客,不止一个,使用名词复数customers.

5.what.考查连词,what引导宾语从句,因为从句中缺少宾语,故填what.

6.more.考查比较级,更多的了解产品,表示比较,故填more.

7.to leave.考查不定式,be allowed to do sth：被允许做某事,故填to leave.

8.comes.考查动词,主语是名词单数,结合上下文使用一般现在时,故填comes.

9.of.考查介词,be free of：免受,午餐免费,故填of.

10.that.考查连词,so…that：如此…以至于,故填that.

1 don't feel　 　（精力充沛的）enough to rush about, so Ill sit down.

答案：energetic.考查翻译填空,根据系动词feel可知填写形容词作表语,energetic：精力充沛的,结合句意,我没有精神到处跑,所以我坐下来.故填energetic.

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