Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. 1.
Write it out
You can also check a math problem by writing everything out on paper. 2. Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.
3.
Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.
Plugging in
You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量). 4. This is the only real way to assure yourself that the answer you’ve found is correct.
Check for a reasonable answer
5. For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas (公式) and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.
A．Do the opposite
B．Correct the answers
C．Therefore you’ll improve your grades, as well as your math skills.
D．Plug the variable in the equation (方程) to check it out.
E. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.
F. It also helps you to figure out everything after you have already finished the test.
G. This helps you to know what information you have and what information you need to solve.
1.C
2.G
3.A
4.D
5.E
【解析】
试题分析：
1.从前面的句子：Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. 可知要提高成绩和数学技能。选C
2.从前面的句子;You can also check a math problem by writing everything out on paper.可知这样做可以让你知道自己有什么信息，需要解决什么信息。选G
3.从后面的句子：Make sure your answers work by doing the opposite procedure of what your problem calls for, 说明我们可以反过来做题目。选A
4.从前面的句子：You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量). 可知是在方程式中带入变量来检查。选D
5.从后面的举例：For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point.可知如果结果没有意义，说明答案有误。选E
考点：考查信息匹配
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名师点睛字词句段篇系列答案科目：高中英语 来源：2011届四川省南充市高三第二次诊断性考试英语卷 题型：阅读理解
Our bodies are wonderfully skillful at keeping balance．When the temperature jumps, we sweat to cool down．When our blood pressure falls, our hearts can do something．As it turns out, though, our natural state is always changing．Researchers are finding that everything from blood pressure to brain function changes regularly with the cycles of sun, moon and seasons．And their insights （洞察力） are getting new ways for keeping away such common killers as heart disease and cancer．Only one doctor in 20 has a good knowledge of the scientific use of time in medicine．But according to a new American Medical Association, three out of four are eager to change that．“The field is exploding,” says Michael Smolensky．“Doctors used to look at us like, What spaceship did you get off ? Now they're thirsty to know more．”
In medical school, most doctors learn that people with chronic conditions should take their medicine regularly．“It’s a terrible way to treat disease,” says Dr Richard Martin．For example, asthmatics （气喘患者） are most likely to suffer during the night．Yet most patients try to keep a constant level of medicine in their blood day and night, whether by breathing in on an inhaler （吸入器） four times a day or taking a pill each morning and evening．In recent studies, researchers have found that a large mid afternoon dose of a bronchodilator （支气管扩张剂） can be as safe as several small doses, and better for preventing nighttime attacks．
If the night belongs to asthma, the dawn belongs to high blood pressure and heart disease．Heart attacks are twice as common at 9 a．m．as at 11 p．m．Part of the reason is that our blood pressure falls at night, then rises as we start to work for the day．“Doctors know that,” says Dr．Henry Black of Chicago's Medical Center, “but until now, we haven't been able to do anything about it．” Most blood - pressure drugs provide 18 to 20 hours of relief （减缓）．But because they’re taken in the morning, they're least effective when most needed．“You take your pill at 7 and it's working by 9,” says Dr．William White of the University of Connecticut Health Center “But by that time you've gone through the worst four hours of the day with no protection．” Bedtime medicine would prevent high blood pressure, but it would also push blood pressure to dangerously low levels during the night．
【小题1】Researchers are finding that _________ ．
| A．heart disease and cancer are the most common killers of human beings |
| B．only blood pressure and brain function are decided by cycles of sun, moon and seasons |
| C．the functions of human bodies have much to do with nature |
| D．any change in human bodies goes with changes in the surroundings |
take their medicine _________ ．| A．at certain time |
| B．each morning and evening |
| C．when the disease occurs |
| D．at midafternoon |
| A．Medicine Is Everything | B．Treatment Is Everything |
| C．Timing Is Everything | D．Prevention Is Everything |
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第三部分 阅读理解（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出一个最佳选项，并在答题卡上将该项涂黑。
The key to happiness is how quickly you can get back your focus on what`s important.
——Anonymous
Sixteen years ago I learned this lesson in the back of a New York City taxi cab. Here`s what happened. I hopped in a taxi，and we took off for Grand Central Station. We were driving in the right lane when，all of a sudden，a black car jumped out of a parking space right in front of us. My taxi driver slammed on his brakes，skidded，and missed the other car`s back end by just inches!
The driver of the other car，who almost caused a big accident，started yelling bad words at us. My taxi driver just smiled and waved at the guy. And I mean，he was friendly. So，I said，"Why did you just do that？This guy almost ruined your car and sent us to the hospital！"And this is when my taxi driver told me what I now call "The Law of the Garbage Truck. "
Many people are like garbage （rubbish）trucks. They run around full of garbage，full of frus-tration， full of anger，and full of disappointment. As their garbage piles up，they need a place to dump it. And if you let them，they`ll dump it on you. When someone wants to dump on you，don`t take it personally. You just smile，wave，wish them well，and move on. You`ll be happy with what you did.
I started thinking，how often do I led Garbage Trucks run right over me？And how often do I take their garbage and spread it to other people ai work，at home，or on the streets？It was that day
I said，"I`m not going to do anymore. "
Successful people do not let Garbage Trucks take over their day. What about you？If you let more garbage trucks pass you by，you`ll be happier. Life`s too short to wake up in the morning with regrets. So，Love the people who treat you right. Forget about the ones who don`t.
56.What happened one day when the author was taking a taxi？
A.The taxi almost hit another car.
B.The taxi driver was injured.
C.The author scolded the driver of the other car.
D.The author learned a lesson from the driver of the garbage truck.
57.How did the taxi driver respond to the behaviour of the driver of the black car？
A.He yelled back at the driver.
B.He sent the driver to the hospital.
C.He was friendly towards the driver.
D.He dumped some garbage in front of his car.
58.What does the taxi driver think of people according to Paragraph 3？
A.Many people like to drive garbage trucks.
B.Many people dump garbage wherever they like.
C.Many people are warm-hearted to make others happy.
D.Many people tend to be very much depressed.
59.What can we infer from Paragraph 4？
A.The author used to have a lot of garbage trucks.
B.The author used to complain a lot.
C.The author used to have a lot of money.
D.The author used to be a good manager.
60.According to the passage，what should you do if people "dump garbage" on you？
A.Ignore them and go on with our own work.
B.Try our best to persuade them not to do that again.
C.Tell them to dump the garbage in the right place.
D.Take over their work and carry the garbage to somewhere else.
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Facebook means never having to say goodbye. The social media website has earned a reputation for reconnecting old friends. Last week, a guy whom I hadn’t seen since my bachelor party five years ago sent me a friend request. I accepted and waited for “Easy E” to send me a greeting of some kind. He had sought me out, after all.
I learned from his profile that he was in a relationship and had a son. However, I’m pretty sure we won’t ever write wall-to-wall, let alone e-mail each other. But he’ll remain a friend of online until one of us makes a point of removing the other from his official list.
My pool of friends consists of family members, college buddies, co-workers from past and present, and friends of friends. There are 35 in all. If I spent some time uploading old e-mail addresses, I’m confident that I could increase my friend count actually.
A person could make a mission out of reconnecting with childhood friends, former classmates, distant cousins, and those one would like to get to know better. And some people can even handle hundreds of on-screen relationships, keeping up with the daily happenings of their small army of companions. After all, there are worse fates than having too many friends.
Thanks to e-mail, the inability to schedule face-to-face meetings no longer means a friendship must come to a close. But even with e-mail, people will lose touch if one or both parties stop writing back. That’s normal. People move from school to school, job to job, city to city. You never have to feel guilty for breaking away.
Every day, the masterminds of Web 2.0 find new ways of making human communication easier. However, convenience can be a walking stick. Some things shouldn’t be simplified. When it comes to friendship, there can be no shortcuts.
【小题1】According to Paragraph 1, the website is famous because .
| A．it has an interesting name of “Facebook” |
| B．it can send people a greeting of some kind |
| C．it helps people get in touch with old friends |
| D．it reminds people of events in the past |
| A．would write to the friend quite often |
| B．did get some information about the friend |
| C．asked the friend to e-mail him |
| D．would keep in touch with the friend forever |
| A．The author communicates with all the 35 friends by e-mails. |
| B．There are 35 people in the author’s list of friends right now. |
| C．The list of 35 friends doesn’t include the old e-mail addresses. |
| D．It is not difficult for the author to increase his friend count. |
| A．The masterminds of Web 2.0 also sell walking sticks online. |
| B．Taking a walking stick is a new way of making friends online. |
| C．Convenience is dangerous for human communication. |
| D．Convenience is not really good for human communication. |
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A few years ago a group of salesmen went to a meeting in Chicago. They had assured their wives that they would be home in plenty of time for Friday night’s dinner. In their rush, with tickets, one of these salesmen happened to kick over a table which held a display of baskets of apples. Apples flew everywhere. Without stopping or looking back, they all managed to reach the plane in time for their boarding.
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The 16-year-old girl was totally blind! She was softly crying, tears running down her face. The salesman knelt on the floor with her, gathered up the apples, put them into the baskets, and helped set the display up once more. As he did this, he noticed that many of them had become damaged; then he set them aside in another basket. When he had finished, he pulled out his wallet and said to the girl, “Here, please take the $20 for the damage we did.” He continued, “I’m sorry for what we did and hope we didn’t spoil your day too badly.”
She nodded with her tears. As the salesman started to walk away, the blind girl called out to him, “Mr. ...”. He stopped, and turned back. She continued, “Thank you very much”.
1.These salesmen were hurrying because they ________.
|
A．had to attend an important meeting |
|
B．wanted to have plenty of time at home |
|
C．almost missed reaching the airplane |
|
D．hoped to have Friday night’s party |
2.Which of the following is the correct order of what the salesman did?
a. He made an apology to the blind girl.
b. He told his friends to go on without him.
c. He experienced a twinge of sorrow.
d. He returned to the fallen apple stand.
e. He paid the girl $20 for the damage.
|
A．c-e-b-d-a |
B．c-b-d-e-a |
|
C．d-b-c-a-e |
D．d-c-b-e-a |
3.Which of the following can describe the salesman?
|
A．Popular and friendly. |
B．Good and humorous. |
|
C．Honest and generous. |
D．Kind and considerate. |
4.Which of the following would be the best title for the passage?
|
A．A Man’s Kind Action |
|
B．Picking up the Fallen Apples |
|
C．A Blind Girl’s Bad Luck |
|
D．A Blind Girl Who Sold Apples |
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That cold January night, I was growing sick of my life in San Francisco. There I was, walking home at one in the morning after a tiring practice at the theatre. With opening night only a week away, I was still learning my lines. I was having trouble dealing with my part-time job at the bank and my acting at night at the same time. As I walked, I thought seriously about giving up both acting and San Francisco. City life had become too much for me.
As I walked down empty streets under tall buildings, I felt very small and cold. I began running, both to keep warm and to keep away from any possible robbers (抢劫犯). Very few people were still out except a few sad-looking homeless people under blankets.
About a block from my apartment (公寓房间), I heard a sound behind me. I turned quickly, half expecting to see someone with a knife or a gun. The street was empty. All I saw was a shining streetlight. Still, the noise had made me nervous, so I started to run faster. Not until I reached my apartment building and unlocked the door did I realize what the noise had been. It had been my wallet falling to the sidewalk.
Suddenly I wasn’t cold or tired anymore. I ran out of the door and back to where I’d heard the noise. Although I searched the sidewalk anxiously for fifteen minutes, my wallet was nowhere to be found.
Just as I was about to give up the search, I heard the garbage truck (垃圾车) pull up to the sidewalk next to me. When a voice called from the inside, “ Alisa Camacho?” I thought I was dreaming. How could this man know my name? the door opened, and out jumped a small red-haired man with an amused look in his eyes. “Is this what you’re looking for?” he asked, holding up a small square shape.
It was nearly 3 A.M. by the time I got into bed. I wouldn’t get much sleep that night, but I had gotten my wallet back. I also had gotten back some enjoyment of city life. I realized that the city couldn’t be a bad place as long as people were willing to help each other.
1. How did the writer feel when she was walking home after work?
A. Cold and sick B. Fortunate and helpful
C. Satisfied and cheerful D. Disappointed and helpless
2. From the first paragraph, we learn that the writer was busy ______.
A. solving her problem at the bank B. taking part in various city activities
C. learning acting in a n evening school D. preparing for the first night show
3. On her way home the writer _______.
A. lost her wallet unknowingly B. was stopped by a garbage truck driver
C. was robbed of her wallet by an armed man D. found some homeless people following her
4. In the fifth paragraph, why did the writer say she was dreaming?
A. Someone offered to take her back home. B. A red-haired man came to see her.
C. She heard someone call her name D. Her wallet was found in a garbage truck.
5. From the text, we can infer that the writer _________.
A. would stop working at night B. would stay on in San Francisco
C. would make friends with cleaners D. would give up her job at the bank
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