People who are worried about bad breath often...

People who are worried about bad breath often reach for a toothbrush or a gun. But in the future, personal breath monitoring may include far more than fresh breath.

In face, breath is so rich in chemical compounds that fully understanding it has proved challenging. Each breath contains gases like carbon dioxide, the volatile(挥发性的)remains of recent snacks, medicines and even compounds taken in from things like carpeting or various kinds of air pollution. But breath detectors(检测器) can sort out these substances with increasing sensitivity(敏感性)。

Scientists are building electronic sniffers that examine the exhaled(呼气)air for signs of cancer, asthma(哮喘), and other diseases.

“There are clear signatures in the breath for liver(肝)disease, kidney(肾)disease and heart disease. Breath is a rich mixture that can reflect out state of health and disease.” said Dr. Raed Dweik, director of the Cleveland Clinic, adding “Breath analysis is the future of medical testing.”

He and his partners are testing a desktop system called BreathLink for use in rapid identification of diseases. The system is designed to work wherever there is an Internet connection. To use BreathLink, a person breathes into a long tube, and a breath sample is collected and analyzed within the system. Then it can detail chemical concentrations(浓度)of the breath in graphics. Dr. Raed Dweik said, “If you examine patients of asthma, you will find they have higher levels of nitric oxide(一氧化碳) in their exhaled air. It reflects their abnormal symptoms in the lungs.” His tests have reached 85 percent accuracy(精确度)so far in spotting people with some illness.

But some trained dogs, he pointed out, can sniff out cancer with 99 percent accuracy—although without the ability to identify particular compounds the way some detectors can.

“We are getting better and better,” he said. “But whether we will ever approach the accuracy of the dog—we don’t know.”

1.What is the breath detector used for?

A. To find what kind of disease a person has.

B. To identify substances from people’s breath.

C. To help a patient recover from disease.

D. To smell how bad the breath is.

2.In the fifth paragraph, what Dr. Raed Dwik said is meant to______.

A. show how he and his partners treated patients

B. tell why a person has asthma

C. show how sensitive the device is

D. show how to diagnose a patient of asthma

3.It can be inferred that_______

A. brushing teeth can improve one’s bad breath

B. there are leftovers like snacks and medicines in one’s breath

C. one can know exactly about his physical state through the breath

D. breath analysis can be helpful in medical diagnosis

4.What’s the author’s attitude towards the future of breath detectors?

A. Indifferent　　　　 B. Positive

C. Doubtful.　　　　 D. Critical.

高三英语阅读理解中等难度题查看答案及解析

People are often worried about going to other countries due to the

“language problems”.But as a matter of_____ , you can still have a

76. ______

great time living a_____ without many language skills.Here are some tips.

77. ______

To begin with, take the time to learn a few basic _____ (表达) and

78. ______

how to c_____ from one to ten.Secondly, open your mouth and say“ahh”

79. ______

before _____ (问) the way, as if you were at the doctor’s.Follow“ahh”

80. ______

by the name of the place you’re going to, l_____“ahh Paris”.Lastly,

81. ______

speak simply.Say“Menu, please.”rather_____“I would like a menu,

82. ______

please.”If your vocabulary is_____ (有限), try to communicate by writing.

83. ______

Carry_____ and a pen, and get waiters or clerks to write down prices for

84. ______

you.Most importantly, give y_____ a chance to use body language.

85. ______

高三英语其他题中等难度题查看答案及解析

A person’s nose is important for breathing and smelling.　 1. Some people are able to “lead other people by the nose”. For example, if a wife “leads her husband by the nose”, she makes him do whatever she wants him to do. 2. They will not change their opinions or positions on anything. If someone is “hard-nosed”, chances are that he will never “pay through the nose”, or pay too much money for an object or service.

It is always helpful when people “keep their nose out of other people's business”. They do not interfere(干涉). The opposite of this is someone who “noses around” all the time. 3. He is considered “nosey”. Someone who “keeps his nose to the grindstone(旋转磨石)” works very hard. This can help a worker “keep his nose clean” or stay out of trouble.

One unusual expression is “that is no skin off my nose”. This means that a situation does not affect or concern me. We also say that sometimes a person “cuts off his nose to spite his face”. That is, he makes a situation worse for himself by doing something foolish because he is angry. More problems can develop if a person “looks down his nose” at someone or something. 4. This person might also “turn up his nose” at something that he considers not good enough. This person thinks he is better than everyone else. He “has his nose in the air”.

5.　 They refuse to obey orders or do any work. Maybe these students do not know the correct answers. My mother always told me, if you study hard, the answers should be “right under your nose” or easily seen.

A. This kind of person is interested in other people's private matters.

B. In school, some students “thumb their nose” at their teacher.

C. The nose also has a lot of other functions.

D. Some people are said to be “hard-nosed”.

E. The nose is also used in many popular expressions.

F. He is interested in things that concern his work.

G. The person acts like something is unimportant or worthless.

高三英语其他题困难题查看答案及解析

I hate Black Friday sales. It’s often a gathering of people who are here for many different reasons. Some are looking for a deal on that one item for their loved one, or perhaps themselves. Their intentions are completely unrelated to the festive time of the year.

It was several years ago when my wife asked me to meet her at the local department store on Black Friday morning. They had advertised a child’s bike that she wanted to purchase for our son. We stood with a very large crowd, waiting for the manager to blow the whistle. After a while the whistle blew, it was like throwing a bucket of small fish into a tank of sharks. I suddenly felt my wife’s hope was slim. I told her that if we obtained a bike, fine, but if we did not, I was OK with that too.

As the pile of bikes began to gradually decrease in size, I saw my polite opportunity to wrap my hands around the comer of one of the boxes. I lifted it up and suddenly felt some mild resistance. I looked up see one of the largest gentlemen I had ever seen in my life. Frightening was not the word to describe his presence. He wore lots of belts of metal studded leather around both arms and even his neck. Tattoos (纹身) were an obvious passion of his.

I started to give up the box but he gently pushed it back in my direction and back into my hands. He then directed it into my shopping cart. He looked at me, smiled, and said, “Merry Christmas.” My wife and I went to the checkout, paid for the bike and went home. All the way home I was thinking that this moment was by far the best gift I had ever received for Christmas. The kindness of a stranger broke all preconceived notions (预想) I may have had of stereotypes and prejudices.

1.How did the author feel when going into the store?

A. The crowd was like small fish.　　 B. They might not get the bike.

C. He was excited to do the shopping.　　 D. The whistle was blown too late.

2.What happened when the author was buying the bike?

A. He was scared by a man’s look at first.　　 B. A gentleman bought the bike for him.

C. A stranger helped him lift the box.　　 D. He gave up the bike he first touched.

3.What can we learn from the author’s experience?

A. Look before you leap.　　 B. Custom is a second nature.

C. Doing is better than saying.　　 D. Don’t judge a book by its cover.

4.What may be the best title for the passage?

A. Black Friday Sales　　 B. My son’s best bike

C. The best Christmas gift　　 D. A strange gentleman

高三英语阅读理解中等难度题查看答案及解析

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

It 1.debate) for years: Are eggs good or bad for you? People who eat an added three or four eggs a week or 300 milligrams of dietary cholesterol (胆固醇) per day, have a higher risk of both heart disease and early death compared with those who eat 2. (few) eggs, new research finds.

“Eggs, 3. (special) the yolk, are a major source of dietary cholesterol,” wrote Victor Zhong. In 4. study published Friday in the medical journal JAMA 5. there are many unexpected reports, he and his colleagues noted that a single large egg contains about 186 milligrams of cholesterol. Over the follow-up period, a total of 5400 cardiovascular (心血管的) 6. (event)　 occurred, including 1302 fatal and nonfatal strokes, 1, 897 incidents of fatal and nonfatal heart 7. (fail)　 and 113 other heart disease deaths. An additional 6132 participants died of other causes. 8. (consume) an additional 300 milligrams of dietary cholesterol per day was associated 9. a 3.2% higher risk of heart disease and a 4.4% higher risk of early death, Zhong’s analysis of the data showed.

“Eggs are a nutritious food. While this study focuses on the amount we’re eating, it’s just as important 10. (pay) attention to how the eggs are cooked and to the trimmings that come with them,” said Taylor, who was not involved in the research.

高三英语语法填空中等难度题查看答案及解析

The English are often described as unfriendly people who don’t talk to strangers（陌生人）。 But not London taxi drivers. I once asked one cabby to describe his life to me and he didn’t stop talking until I arrived home half an hour later. He told me many interesting stories and this is one of them.“Some strange things happen late at night. The other day I was taking a woman home from a party. She had her little dog with her. When we got to her house， she found that she’d lost her key. So， I waited in the cab with her dog while she climbed in through the window.”

“I waited and waited. After half an hour of ringing the bell I decided to find out what was going on. I tied the dog to a tree and started to climb in through the window. The next thing I knew was that the police came. They thought I was to rob the house！ Luckily， the woman came downstairs. She’d gone to sleep and forgotten about me and the dog. I was in such a hurry to get away that I forgot to ask her for the fare.”

1. What does the writer think of the London taxi driver？

2. From the passage， we know_________.

3. What does “cabby” mean？

4.Why did the taxi driver wait for the woman？

A. Because she had left her dog with him.

B. Because she had not paid him.

C. Because she wanted to go out again.

D. Both A and B.

5. Why do you think the woman didn’t go out of the house again.

高三英语阅读理解中等难度题查看答案及解析

Consensus about screens(硅谷精英禁子女玩手机)

The people 1.are　 2.(close) to a thing are often the most wary (警惕的)of it. 3.(Technology) know how phones really work, and many have decided they don't want their own children anywhere near them. 4.wariness that has been slowly brewing is turning into a regionwide consensus in Silicon Valley: The benefits of screens 5.a learning tool 6.(overblow), and the risks for addiction and stunting development seem high. Tim Cook, the CEO of Apple, said earlier this year that he would not let his nephew join social networks. Bill Gates 7.(ban) cellphones until his children were teenagers. "On the scale between candy and crack cocaine,　 8. is closer to crack cocaine," Chris Anderson, the former editor of Wired, said of screens. "We thought we could control it. 9.it's beyond our power 10.(control). This is going straight to the pleasure centers of the developing brain."

高三英语语法填空困难题查看答案及解析

Some retired people have nothing to do. They often get together and ___for hours talking about their past experiences.

高三英语单项填空中等难度题查看答案及解析

People who have studied ancient instruments are hoping to learn more about the culture that ______ this ancient flute.

A．produce          B．produced         C．is producing       D．was produced

高三英语单项填空中等难度题查看答案及解析

Public service ads，also PSAs，often _________ for free，_________ to educate people about health，safety or any other problem that affects public welfare.

A． run；meant　　 　　 B． are run；are meant

C． are run；mean　　 D． run；are meant

高三英语单项填空中等难度题查看答案及解析