Some people don’t believe that driving more slowly can save lives. But the truth is that driving more slowly can help a person to avoid serious accidents.
The following chart shows the distance that it takes to stop a car at a given speed. The distance is measured in feet. The shaded area shows the driver’s thinking distance. That’s the distance it takes for the driver to react to a danger that he sees. The white area shows the car’s braking distance. That’s the distance it takes for the car to stop once the brakes are used. The number at the top of each bar shows the total number of feet that it takes to stop the car
72. According to the chart, what is the total number of feet needed to stop a car that is traveling at 50 miles per hour?
A. 55.    B. 73.    C. 128.    D. 183.
73. What is the braking distance for a car that is traveling at 60 miles per hour?
A. 66 feet.    B. 119 feet.    C. 185 feet.    D. 251 feet.
74. Which of the following statements about braking and speed is TRUE?
A. The braking distance is what it takes for the driver to react to a danger that he sees.
B. The speed of a car has a direct effect on the distance needed to stop the car.
C. The braking distance increases only when a driver drives faster than 50 miles per hour
D. Driving slowly can help a person to avoid all accidents
75. The underlined word probably means _____.
A. equipment for slowing down or stopping    B. object that turns around
C. object to control the direction in a car    D. large glass window at the front of a vehicle
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：完形填空

完形填空（共20小題，每題1分，滿分20分）
閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A、B、C和D）中，選出可以填入空白處的最佳選項(xiàng)。
I got lots of interesting experiences in a free school. At first I couldn’t believe it. There were no    41    in rows or loud-sounding bells, nor did anyone have to go to    42   . Although we lived “in”,    43   made us go to bed at a certain time; there was no “ lights out”.
The    44  thing was that practically all the students went to class, and very few people stayed up late at night. Only the new people stayed up or    45  class. The new ones always went wild    46   , but his wildness never lasted long. The freedom took some getting used to. Our teachers treated us like  _47  ; never did we have to   48_   “ stand up”, “ sit down”, “ speak out”. I don’t    49    one student who didn’t try his best.
The subjects were the same as those in the ___50_____ school, but what a difference in the method! For example, in botany (植物學(xué)) we had   51__  classes in the spring or fall, but instead we planted two gardens, a vegetable garden and a flower garden. Then in winter we each studied a few    52  things about what we had grown. In math the students built three different sizes of storerooms---small ones   53   , but usable. They did this instead of having lessons in the classroom. They really had a    54  time, too, designing everything, drawing the blueprints(藍(lán)圖;設(shè)計(jì)圖), figuring out the angles and so on. I didn’t take    55__ . But I could do the basic things with numbers. That’s   56   .
57_    I think I am a      58    person for having gone to the school. I can read and write as well as anyone else of my age, and I think better. That’s probably a real big      ___59     between the free school and the regular school--- the amount of   60   .
41.A.desks           B. lights         C. books            D. windows
42.A. home           B. bed           C. class             D. work
43.A. teachers         B. parents        C. nobody           D. somebody
44.A. sad             B. last          C. good             D. strange
45.A. attended         B. took          C. missed           D. studied
46.A. from then on     B. at first         C. once more        D. just then
47.A. workers         B. pupils         C. gardeners         D. grown- ups
48.A. play            B. say           C. study             D. understand
49.A. hear from        B. feel like       C. think about        D. know of
50.A. night           B. regular        C. small            D. real
51.A. all             B. short        C. no               D. indoor
52.A.wild            B. successful     C. interested        D. particular
53.A. as well         B. after a while  C. of course         D. as a result
54.A. funny          B. great         C. convenient        D. terrible
55.A. math          B. angle        C. botany           D. gardens
56.A. uninteresting    B. interesting     C. enough          D. dangerous
57.A.On the whole    B. Once again     C. Sooner or later     D. After a while
58.A. careful         B. better         C. busier            D. lovely
59.A. problem        B. chance        C. difference         D. change
60.A. reading         B. gardening     C. teaching         D. thinking

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Last spring, members of Alaska’s Troop 34, based in Fairbanks, trudged (跋涉) out into the snowy wilderness to take part in their state’s Take a Kid Trapping program. In many parts of the state, beavers （海貍）are pests and need to be controlled.
The 10－to－12－year－old girls found out where beavers lived, set traps, and skinned the two animals they caught. The girls hope to catch ten more beavers so that the entire troop can make mittens and hats with the fur. They also want to cook beaver meat.
Troop leaders and members say the Scouts are doing a good deed by helping control the state’s beaver population. But animal－rights activists say trapping is cruel. They want the Girl Scouts to stop in their tracks.
Beavers aren’t only causing a problem in Alaska. Residents in Sampson County, N.C. , have turned to a local committee to help them battle the growing beaver population there.
County landowners are frustrated after the county spent more than $ 50,000 in eight years trying to reduce the beaver population through a government program. The joint state and federal program included paying money to trappers for every beaver carcass  they trapped.
Many local residents say that the program didn’t work because there were too few trappers. That’s why the county set up its own committee to investigate other ways to control the area’s beaver population.
The county will rely on its own beaver－trapping program. It has hired a trapper to set traps in various areas. The county will pay $10 for every beaver carcass.
Why do many people say that beavers are a nuisance? For beavers to survive, they need lots of water. Water provides the large rodent （嚙齒動(dòng)物）with a place to hide from meat – eating animals. Beavers also store food underwater for the winter. When there’s not enough water in a particular area, beavers get busy building dams.
Beaver dams can cause major flooding and damage to the surrounding countryside as the animals cut down trees to use in their construction projects. Beavers build canals to transport heavy objects.
59．What is Alaska’s Troop 34?
A．A team of the Boy Scouts.     B．An army.
C．A team of the Girl Scouts.     D．A sports team.
60．Why does the troop hope to catch ten more beavers?
A．To fulfill their task.        B．To sell them for money.
C．To get enough fur.   D．To exchange them for mittens and hats.
61．Which of the following statements is true?
A．Sampson County has to find a new way to control the beaver population there.
B．The government program in Sampson County has proved to be a success.
C．The local government has controlled the number of beavers in the County.
D．More and more trappers now start to set traps in Sampson County.
62．Local residents hate beavers because they can ___________.
A．cause damage to dams
B．block up canals with heavy objects.
C．do great harm to construction projects.
D．badly damage the environment and cause floods.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


If you are afraid of the dark，it’s not a big deal．It’s perfectly normal to feel afraid After all，animals do too. “Fear matters，”says Karen Warkentin，an ecologist．“It’s a good thing，” she adds, “because fear makes you do things that keep you alive.”
Like kids，many animals experience fear and they respond to the feeling in variety of ways．A
frightened turtle pulls its head and legs inside its shell．A small fish will swim away when a big，hungry fish approaches．
Some animals respond to fear in ways you might not expect．The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red—eyed tree frogs in Costa Rica.
In this species，female frogs attach jellylike clumps（果凍一樣的塊狀物）of their eggs to the undersides of leaves．The leaves hang on branches that dangle（懸掛）over ponds．After they hatch from the eggs，the tadpoles（蝌蚪）then fall into the water，where they eventually grow into
adult frogs.
Tree frog eggs usually grow for 6 days before hatching．If they sense that a hungry snake is about to attack，however，they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim，by falling into the water early，the tadpoles can escape.
If hatching early helps protect red—eyed tree frogs from snakes，you might wonder why their eggs don’t always hatch sooner．It turns out that hatching early brings its own danger．Once tadpoles land in the water，hungry fish and other animals like to eat them too．Staying in their eggs for a full 6 days，then，allows frog embryos（胚胎）to grow big and strong．This extra growth improves their chances of surviving in the water．
68．It can be inferred from the passage that fears______
A．help animals grow bigger and stronger
B．a(chǎn)re less common among young animals
C．help animals move a lot to fit the environment
D．a(chǎn)re more or less important in order for animals to survive
69．We are told in the passage that tree frogs______
A．face danger both inside their eggs and in the water
B．will grow fast if they fall into the water later
C．a(chǎn)re surprisingly clever when inside their eggs
D．stay in their eggs longer if they are frightened
70．What do you think would be discussed in the following paragraph?
A．Further explanations as to why tree frogs hatch ahead of schedule．
B．How the unborn frogs know when a snake is about to attack them．
C．Another example of animals that responds to fear in an unexpected way．
D．How tree frogs improve their chances of survival before falling into the water.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


四、閱讀理解
There’s a box of chocolates in the fridge. It’s been there for more than a week since I was given it as a present. I do love chocolates, but they make me fat if I eat too many! Can I control myself? If I eat one, will I have to eat all of them?
My son Harry is obsessed with playing Wii(/wi:/, 任天堂的一款游戲機(jī)) games. Sometimes, it’s difficult to get him to concentrate on his homework because he wants to play some more.
Last week I had to wake up a student in my class. I asked him why he was so tried and he said he had stayed up late to play his favourite Internet game, Farmville. He said he just couldn’t stop playing it! Now his academic work is suffering because he can’t control his urge to play games.
What my son, my student, and I myself need is simply self-control.
In the late 1960’s, American psychologist Walter Mischel launched an experiment about self-control. He left a group of four-year-olds in a room and told them that if they could wait 20 minutes, they could have two marshmallows, a kind of sweet. If they couldn’t wait, he would only give them one.
In videos of the experiment, you can see children squirming, kicking, hiding their eyes—desperately trying to control themselves. Some did wait patiently, while others couldn’t wait a single minute.
Years later, the self-controlled children turned out to get higher SAT scores and got into better colleges. The children who couldn’t wait were more likely to become bullies.
So, the chocolates are still in the fridge. My son Harry is doing his homework with a promise that he can play on the Wii later, and my student says he will try harder to control himself. We all have our own temptations. But if we can control them, we will achieve more.
56. Which of the following is different from the other three?
A. The writer.                                          B. Harry.
C. The writer’s student.                             D. Walter Mischel.
57. We can know from paragraph 5 to paragraph 7 that____________.
A. all the children got two marshmallows
B. all the children waited patiently  
C. self-control can help children succeed later
D. the children who lack self-control get higher SAT scores
58. Which of the following statement is true?
A. The writer is addicted to Wii.
B. The writer’s son is addicted to Farmville.
C. The writer’s student is addicted to chocolates.
D. The writer’s student is addicted to Farmville.
59. What does the underlined word mean in paragraph 5?
A. Something we can eat.                   B. A kind of toy.
C. A kind of mushroom.                     D. A kind of prize.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


第二部分：閱讀理解（共兩節(jié)）
第一節(jié)：閱讀理解（共20小題；每小題2分，滿分40分）
閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。
We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets．
Not long ago．My wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change．Scientists have reported recently that the world is heating up even faster than predicted only a few years ago, and that the consequences could be severe if we don’t keep reducing emissions（排放）of carbon dioxide（CO2）and other greenhouse gases that are trapping heat in our atmosphere．
We decided to try an experiment．For one month we recorded our personal emissions of CO2．We wanted to see how much we could cut back, so we went on a strict diet．The average US household produces about 150 pounds of CO2 a day by doing common-place things like turning on air-conditioning or driving cars．That’s more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses．But how much should we try to reduce?
For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth．In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the meltingof the ice sheets in Greenland or West Antarctica．“To stay below that point, we need to reduce CO2 emissions by 80 percent,” he said．
Good advice, I thought．I’d opened our bedroom windows to let in the wind．We’d gotten so used to keeping our air-conditioning going around the clock．I’d almost forgotten the windows even opened．We should not let this happen again．It’s time for us to change our habits if necessary．
41．Why did the author and his wife try a new diet?
A．To take special kinds of food B．To respond to climate change．
C．To lose weight      D．To improve their health
42．The underlined words “tipping points” most probably refer to          .
A．freezing points         B．burning points      
C．melting points           D．boiling points
43．It can be inferred from the passage that        .
A．it is necessary to keep the air-conditioning on all the time
B．it seems possible for every household to cut emissions of CO2
C．the average US household produces about 3,000 pounds of CO2 a month
D．the average European household produces about 1,000 pounds of CO2 a month
44．Which of the following would be the best title for this passage?
A．Saving Energy Strats at Home       B．Changing Our Habits Begins at Work
C．Changing Climate Sounds Reasonalbe    D．Reducing Emissions of CO2 Proves Difficult

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Blind photography sounds strange．But a striking exhibition of photographs in California argues that it develops as a result of the contemporary art．The show "Sight Unseen", at the California Museum of Photography until Aug．29, includes everything: underwater scenes, landscapes, abstracts and everything else you might expect from a "sighted" photographer．
How do the blind take their photographs? Some rely on assistants to set up and then describe the shots （鏡頭） , and others just point and shoot in the right place．"Just like any good artists," says McCulloh．"They have their unique ways of operating．" One participating photographer is Pete Eckert, an artist with multiple degrees in design and sculpture who only turned to photography after losing his vision in the mid-1990s．He opens the shutter （快門） on his camera and then uses flashlights, lights, and candies to paint his scene on film．A former fashion photographer in Chicago, Weston, lost his vision due to AIDS in 1996 and focuses on images of destruction and disability．His photos are also a star of the show．
What do gallery-goers say? "I was very impressed by it．The technique and experience was amazingly different," says John Hesketh, a printmaker in Anaheim．"You never have a sense of feeling sorry for these people because they've worked very hard to prove their value．"
Beyond the praise, however, the exhibition also makes a great example for disabled people everywhere．That point was explained in early May during a discussion on the TV show．At the very end of the talk, one attendee expressed his opinion．"This exhibition is extraordinary and revolutionary for many reasons．I think that by being an artist with a disability, you are continuing the work of those people who fought for basic civil rights to gain access and to have a voice．In that way, it's so wonderful that your photographs say it all．"
63．From the passage we know that some blind people take photos by______
A．describing the things to their assistants
B．holding the camera and shooting randomly
C．opening the shutter with the help of others
D．using special equipment designed for them
64．We can learn from the passage that blind photographers ______
A．were not born blind               B．do jobs related to art
C．focus on different subjects           D．like photos of destruction
65．What is people's reaction to the blind photography show?
A．They admire the blind photographers' hard work．
B．They feel really sorry for those blind photographers．
C．They think some have good techniques while others not．
D．They can understand the real meaning of each photograph．
66．The significance of the exhibition lies in the fact that ______．
A．the California Museum of Photography receives praises for holding the show
B．the public have a chance to know what the blind people are concerned about
C．the blind photographers have a good place to show their works
D．the exhibition can be very inspiring to the blind in the world

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

A car drew up outside the Swan Hotel and a young man got out．Pausing only for an instant to see that he had come to the right place，he went into the hotel and rang the bell on the counter of the bar．
Mrs．Crump，the landlady，who was busy in the kitchen at the time，hurried out，wiping her
hands．The young man raised his hat．“Excuse me，”he said．“I’m looking for my uncle，Mr．White．I believe he is staying here．” “He was staying here．”Mrs．Crump corrected him．“But I’m afraid that he went back to London yesterday．” “Oh，dear，”said the young man，looking disappointed．“I understood that he was going to stay here until the end of the month．At least that is what his servant told me when I rang up his house．” “Quite right，”said Mrs，Cramp．“He intended to stay here the whole of July，as he always does． But yesterday he got a telegram to say that his relative was ill．So he caught the train back to London immediately．”  “I wish he had let me know,”The young man said．“I wrote him a letter saying that I was coming．I’ve had all this trouble for nothing．Well，since he isn’t here，there’s no point in waiting．”
He thanked Mrs．Grump and went out．Mrs．Grump went to the window and watched him
drive off．When his car was out of sight，she called out：“You can come out now,Mr．White.He’s gone．”
Mr．White came out of the kitchen，where he had been waiting．
“Many thanks，Mrs．Grump，”he said，laughing，“you did that very well．These nephews of mine never gave me any peace．That young man is the worst of them all．As you see，when he needs money,he even follows me into the country．Well，perhaps next time he won’t warn me by writing a letter!”
49．The young man said “Oh，dear” to express his           ．
    A．disappointment       B．sadness       C．surprise      D．a(chǎn)nger
50．This story is about a man         ．
A．who was very much loved by his nephews 
B．whose nephew went to visit him at the hotel
C．whose nephew is always asking him for help
D．who was not willing to meet his nephew
51．When his nephew came to the hotel，Mr．White            ．
A．took the train back to London            B．left to visit a sick relative
C．went to pick up a telegram               D．hid himself in the kitchen
52．Mr．White didn’t like his nephews because         ．
A．they always follow him around            B．they frequently disturb their relatives
C．they won’t write to him often             D．they usually visit him in hotels

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Recently I paid a visit to Harvard University, where there are top class scientists and professors and the best academic system in the world.
I was pretty shocked when I first stepped onto the campus. Well, it's not even really a campus. It's more like a district in a small town.
Harvard's main buildings are from the 18th century. They look very old and simple. You might even say they're a little shabby. They don't fit the modern idea of university at all. The buildings are surrounded by grass and trees, so I felt as if I had walked into a medieval castle. But when I looked across the street, busy shops and in-fashion students made me feel like I was in the 21st century again. It creates a strong contrast and brings a special atmosphere to the school.
Our tour guide Gary took us around and told us: "You see this grass field in the center of the school? Here is where they host their graduation ceremony. They just set up tents and benches and have a very simple ceremony. Unbelievable! Who would think the most talented students just graduate on the lawn?
I saw some students put a blanket on the grass and lie down to read a book. When I listened to the soft sound of pages turning, along with chirping of the birds, I felt very calm. There was no competitive feeling at all.
Harvard has the world's first computer in its science center and there are hundreds of high-end computers too. Its religion and the literature departments are also among the best. It is the perfect mix of tradition and new technology. It makes Harvard a very attractive place to study in.
I hope one day I'll attend my dream school—Harvard.
45．The article is mainly about        . 
A．the author's campus life in Harvard     B．the author's impression of Harvard
C．Harvard's old buildings                              D．the academic system at Harvard
46．The author was most impressed by        , according to the article. 
A．Harvard's mix of tradition and new technology
B．the classes held on beautiful lawns at Harvard
C．Harvard students not taking their graduation ceremony seriously
D．the feeling of not living in modern society on the campus
47．What can we conclude from the article? 
A．Harvard campus is actually a district of a big city.
B．There are no competitions at Harvard University.
C．Graduation ceremonies are not complex at Harvard.
D．All Harvard buildings date back to the 18th century.
48．According to the article, in which fields is Harvard top in the world? 
A．Literature, arts, and law.              B．Religion, law and arts.
C．Literature, arts and computer science.   D．Religion, computer science and literature.

查看答案和解析>>

同步練習(xí)冊(cè)答案