練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

In the rush to get to school, you drop a piece of toast on the floor. Do you throw it away or dec ide it’ s still OK to eat? If you’re like most people, you eat it. Maybe you follow the “5-second rule”, which claims foods are safe to eat if you pick them up within 5 seconds after dropping them. But you might want to think again. Scientists now say that 5 seconds is all it takes for foods to become polluted with enough bacteria(細(xì)菌) to make you sick.
Bacteria can cause many kinds of illnesses. Some kinds of bacteria can grow on food. If you eat foods on which these bacteria are growing, you can become sick.
One of these food-borne bacteria is Salmonella. It makes 1.4 million people sick every year. Salmonella is often found in raw eggs and chicken. Cooking kills these bacteria, which is why it is so important to cook eggs, chicken, and other foods thoroughly.
But how long does it take these bacteria to pollute food? A team of scientists in South Carolina did an experiment. First, they placed an amount of Salmonella on three surfaces; wood, tile (瓦片), and carpet. They placed a piece of bread and a piece of bologna(大臘腸) on each surface for 5,30, or 60 seconds. After just 5 seconds, both the bread and the bologna picked up enough bacteria to make you sick.
So forget the 5-second rule. If your toast drops on the floor, throw it away and get another piece of clean toast. This time, be careful not to drop it!
【小題1】 In which part of a newspaper can you most probably find this passage?

A.CultureB.HealthC.AdvertisementD.Technology
【小題2】After dropping a piece of toast , a person who follows the “5-second rule”will
A.throw away dirty toast immediately and go away
B.pick up the toast as quickly as possible and eat it
C.eat the toast within 5 seconds and feel pleased
D.get another piece of clean toast quickly and eat it
【小題3】 The scientists in South Carolina did the experiment to
A.see how quickly bacteria can pollute food
B.show that the 5-second rule a correct
C.see how harmful bacteria are to people’ health
D.show that bacteria grow at different speeds on different foods
【小題4】 What’s the writer’s attitude to the “5-second rule”?
A.PositiveB.NegativeC.Neutral (中立)D.Cautious (謹(jǐn)慎)

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Robots are smart. With their computer brains, they help people work in dangerous places or do difficult jobs. Some robots do regular jobs. Bobby, the robot mail carrier, brings mail to a large office building in Washington, D.C. He is one of 250 robot mail carriers in the United States. Mr. Leachim, who weights two hundred pounds and is six feet tall, has some advantages as a teacher. One is that he does not forget details. He knows each child’s name, their parents’ names, and what each child knows and needs to know. In addition, he knows each child’s pets and hobbies. Mr. Leachim does not make mistakes. Each child goes and tells him his or her name, then dials an identification (識(shí)別) number. His computer brain puts the child’s voice and number together. He identifies the child with no mistakes.
Another advantage is that Mr. Leachim is flexible. If the children need more time to do their lessons they can move switches. In this way they can repeat Mr. Leachim’s lesson over and over again. When the children do a good job, he tells them something interesting about their hobbies. At the end of the lesson the children switch Mr. Leachim off.
【小題1】The first paragraph of the passage tells us

A.human beings are not as smart as robots
B.robots will take the place of man to rule the earth
C.we can only use robots to do some regular jobs
D.robots can help people in many different ways
【小題2】What is the most important thing Mr. Leachim can do in his lessons?
A.To meet the needs of each student.
B.To talk to the students in different languages.
C.To keep everyone’s interest in his lessons.
D.To introduce more hobbies to the children.
【小題3】The underlined word “flexible” probably means
A.not strictB.not hard
C.suitableD.changeable
【小題4】Which of the following statements may be TRUE according to the passage?
A. There are 250 robot teachers in the United States.
B. Mr. Leachim is run and controlled by electricity.
C. Bobby works in a large office building in Washington D.C.
D. The lessons taught by Mr. Leachim are given on a TV set.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

The home computer industry has been growing rapidly in the United States in the last ten years. Computers used to be large, expensive machines that were very difficult to use. But scientists and technicians have been making them smaller and cheaper while at the same time they have been made easier to use. As a result, their popularity has been increasing as more people have been buying computers for their homes and businesses.
Computers have been designed to store information and compute problems that are difficult for human beings to work out. Some have voices that speak to their operators. Stores use computers to keep records of their inventories and to send bills to their customers. Offices use computers to copy letters, record business and keep in touch with other offices. People also use computers in their homes to keep track of the money they spend.
One important new use of computers is for entertainment. Many new games have been designed to be played on computers. People of all ages play these games. People also buy home computers to watch movies and listen to concerts at home. They have become very popular indeed.
【小題1】Compared with those of today, computers used to ______.

A.work rapidlyB.be used for fun
C.be large and expensiveD.be easy to use
【小題2】In recent years, computers have become ______.
A.more and more difficult to useB.slower and slower
C.more and more expensiveD.smaller and smaller
【小題3】Home computers can be used for ______.
A.doing business B.writing letters
C.playing gamesD.a(chǎn)ll of the above
【小題4】Salesmen use computers mainly to ______.
A.talk with their friends
B.write letters
C.check the list of goods and send bills
D.play games for pleasure

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Every time you go to the supermarket, you come away with your purchases in plastic bags. But wouldn’t it be kinder to the environment if you asked for paper bags instead?
The answer is not the easy as it might seem. Environmentalists say there are drawbacks to using both plastic bags and paper bags.
According to the American Plastics Council 80 percent of groceries in the US are packed in plastic bags.
“The numbers are becoming huge,” said Vincent Cobb, a businessman from Chicago who set up “reusable bags. com” on the Internet. He notes that consumers use between 500 billion and 1 trillion plastic bags per year worldwide.
Some experts believe that all these bags harm the environment. Plastic takes hundreds of years to break down and, as it does so, poisonous materials are released into the water and soil.
Further damage is caused if plastic bags enter the sea. For example, endangered sea turtles cannot tell the bags from jellyfish(水母), their main source of food, and often choke on them.
Floating plastic bags have been spotted as far north as the Arctic Ocean and as far south as the southern end of South America. One expert predicts that, within ten years, plastic bags will wash up in Antarctica!
However, this kind of bag does have its advantages.
“Plastic grocery bags are some of the most reused things around the house,” explained Laurie Kusek of the American Plastics Council.
According to the Film and Bag Federation, a trade group in the US plastics industry, paper bags use more energy and create more waste than plastic bags. Plastic bags require 40 per cent less energy to produce and cause 70 per cent less air pollution, the group explained. They also release as much as 94 percent less waste into the water than paper ones.
But paper bags do break down more quickly than plastic bags. They don’t endanger wildlife, either.
So what should we do? One possible solution would be to use biodegradable(能被生物分解的)plastic bags. But until biodegradable technology improves, it might be easier to pack things you buy in reusable cloth bags.
【小題1】The best title of the passage is _____.

A.Paper Causes Less Pollution 
B.Plastic Causes Less Pollution 
C.Paper and Plastics Cause Pollution 
D.Paper Bags Break Down More Quickly 
【小題2】The underlined word “drawbacks” might mean “_____”.
A.Advantages B.disadvantages C.a(chǎn)ir pollution D.waste 
【小題3】According to the passage, which of the following in NOT true?
A.Plastic takes longer to break down than paper. 
B.Sea turtles usually mistake the plastic bags for jellyfish. 
C.Paper bags require less energy than plastic bags. 
D.You’d better pack things in reusable cloth bags. 
【小題4】Which of the following shows that paper bags are better than plastic ones?
A.Paper bags take less time to rot. 
B.Paper bags cause less air pollution. 
C.Paper bags are more reusable. 
D.Paper bags cause less water pollution. 

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than on conditions and people on Earth? These are questions that, understandably, are very often asked.
Perhaps the best answer lies in our genetic makeup(基因構(gòu)成) as human beings. What drove our ancestors to move from the trees into the plains, and on into all possible areas and environments? The wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.
Nearly every successful civilization has explored, because by doing so, any dangers in surrounding areas can be identified and prepared for. Without knowledge, we may be completely destroyed by the danger. With knowledge, we can lessen its effects.
Exploration also allows minerals and other potential (潛在的) resources to be found. Even if we have no immediate need of them, they will perhaps be useful later. Resources may be more than physical possessions. Knowledge or techniques have been acquired through exploration. The techniques may have medical applications which can improve the length or quality of our lives. We have already benefited from other spin-offs including improvements in earthquake prediction, in satellites for weather forecasting and in communications systems. Even non-stick pans and mirrored sunglasses are by-products (副產(chǎn)品)  of technological developments in the space, the chance to save ourselves might not exist.
While many resources are spent on what seems a small return, the exploration of space allows creative, brave and intelligent members of our species to focus on what may serve to save us. While space may hold many wonders and explanations of how the universe was formed or how it works, it also holds dangers. The danger exists, but knowledge can help human being to survive. Without the ability to reach out across space, the chance to save ourselves might not exist.
While Earth is the only planet known to support life, surely the adaptive ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future.
【小題1】Why does the author mention the questions in Paragraph1?

A.To express his doubts
B.To compare different ideas.
C.To introduce points for discussion
D.To describe the conditions on Earth.
【小題2】What is the reason for exploring space based on Paragraph2?
A.Humans are nature-born to do so.
B.Humans have the tendency to fight.
C.Humans may find new sources of food.
D.Humans don’t like to stay in the same place.
【小題3】 What makes it possible for humans to live on other planets?
A.Our genetic makeup.
B.Resources on the earth..
C.The adaptive ability of humans.
D.By-products in space exploration.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

The past week was possibly the most eventful in the history of customer technology markets,or to be precise, the 7-inch (17.8-cm) tablet (平板電腦)market. Never before have three of thebiggest players in the industry scheduled what could be truly historic productlaunches (上市)so close together.
Despite its name, the 7.9-inch iPad Mini is one of the largest among the mini-tablets. It's gotall the aesthetics of its earlier 9.7-inch iPad and is unbelievably thin-just 7.2 mm, 23 percentthinner than the iPad.
Apple's iPad Mini
Release date: Nov 2,2012 (Wi-Fi version)
Operating system: iOS 6
Size: 19.9 x 13.5 x 0.7 cm
Prices: $329 (16GB Wi-Fi), $429 (32GB Wi-Fi), $519 (64GB Wi-Fi), or $459 (16GB Data)
$559 (32GB Data), $659 (64GB Data)
Google may have been forced to cancel its Android event in New York City on Oct 29 due to the threat of hurricane Sandy, but that isn't stopping it from making same big announcements. For starters, Google has confirmed (證實(shí))that the Nexus 10 will be running Android 4.2 out of the box, so get excited. It will also come equipped with a 10-inch display running at an impressive 2560x1600 resolution. On the inside, it'll have a A15 dual-core (雙核)processor running alongside 2GB of RAM(內(nèi)存),so expect the Nexus 10 to be a speedy little tablet. Google's Nexus 10 Release date: Nov 13,2012 Operating system: Android 4.2 Jelly Bean Size: 26.4 x 17.8x0.9 cm Prices: $399 (16GB), $449 (32GB)
Microsoft's Surface is a bold product with some great touches. It doesn't feature a camera and focuses on Office software, which suggests Microsoft is focusing this product on an executive toy. There's no 3G connection (only Wi-Fi) so owners won't have to worry about an extra contract.
The real delight, however, is Metro, the impressive navigation interface (導(dǎo)航界面).It is beautifully designed with brightly colored squares for navigation. Pre-orders for Surface in the US sold out over the weekend, so it would seem customers are excited.
Microsoft's Surface
Release date: Oct 26,2012
Operating system: Windows 8 RT
Size: 27.5 x 17.2 x 0.9 cm
Prices: $499 (32GB M-Fi)
【小題1】What can be inferred from the first paragraph?

A.The three biggest companies made a new product together.
B.A technology has been introduced to tablet industry.
C.The three companies launched their new products nearly at the same time.
D.The tablet market, in October was out of control.
【小題2】What is the 7.9-inch iPad Mini's major contribution to the customers?
A.Wi-Fi version B.Operating system
C.Prices D.Size
【小題3】How many technologies will be introduced to the Nexus 10 according to Google?
A.6 B.5 C.4 D.3
【小題4】Which tablet with 32GB Wi-Fi is the most expensive?
A.Microsoft's Surface. B.Apple's iPad Mini.
C.Google's Nexus 10. D.A15 dual-core processor.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

L1PITOR

ABOUT LIPITOR
Lipitor is a prescription medicine.Along with diet and exercise,it lowers “bad,’
cholesterol(膽固醇)in your blood.It can also raise “good'’ cholesterol·
Lipitor can lower the risk of heart attack in patients with several common risk factors,
including family history of early heart disease,high blood pressure,age and smoking·
WHO IS LIPITOR FOR?
Who can take LIPITOR:
.People who cannot lower their cholesterol enough with diet and exercise
·Adults and children over l0
Who should NOT take LIPITOR:
.Women who are pregnant,may be pregnant,or may become pregnant. Lipitor may harm
your unborn baby.
.women who are breast-feeding.Lipitor can pass into your breast milk and may harm
your baby.
·  People with liver(肝臟)problems
 POSSIBLE SIDE EFFECTS OF LIPITOR
Serious side effects in a small number of people:
.Muscle(肌肉)problems that can lead to kidney(腎臟)problems,including kidney failure
.Liver problems.Your doctor may do blood tests to check your liver before you start
Lipitor and while you are taking it.
Call your doctor right away if you have:
.Unexplained muscle pain or weakness,especially if you have a fever or feel very tired
.Swelling of the face,lips,tongue,and/or throat that may cause difficulty in breathing or
swallowing
· Stomach pain
Some common side effects of LIPITOR are:
· Muscle pain
· Upset stomach
· Changes in some blood tests
 
 HOW TO TAKE LIPITOR
DO:
· Take Lipitor as prescribed by your doctor.
· Try to eat heart-healthy foods while you take Lipitor.
· Take Lipitor at any time of day, with or without food.
· If you miss a dose(一劑),take it as soon as you remember.But if it has been more than
12 hours since your missed dose,wait.Take the next dose at your regular time.
Don’t:
· Do not change or stop your dose before talking to your doctor.
· Do not stal-t new medicines before talking to your doctor.
 
【小題1】What is a major function of Lipitor?
A.To help quit smoking. B.To control blood pressure.
C.To improve unhealthy diet. D.To lower "bad" cholesterol.
【小題2】Taking Lipitor is helpful for              .
A.breast-feeding women B.women who are pregnant
C.a(chǎn)dults having heart disease D.teenagers with liver problems
【小題3】If it has been over 12 hours since you missed a dose, you should         .
A.change the amount of your next dose
B.eat more when taking your next dose
C.have a dose as soon as you remember
D.take the next dose at your regular time
【小題4】Which of the following is a common side effect of taking Lipitor?
A.Face swelling. B.Upset stomach.
C.Kidney failure. D.Muscle weakness.
【小題5】What is the main purpose of the passage?
A.To teach patients ways for quick recovery.
B.To present a report on a scientific research.
C.To show the importance of a good lifestyle.
D.To give information about a kind of medicine

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

查看答案和解析>>

同步練習(xí)冊(cè)答案