I welcome the news ________ attacks on women on the railways are 19 percent down.
A.which | B.that | C.when | D.whether |
高三英语单项填空简单题
I welcome the news ________ attacks on women on the railways are 19 percent down.
A.which | B.that | C.when | D.whether |
高三英语单项填空简单题查看答案及解析
With the Covid-19 virus sweeping the globe, the science on quitting smoking offers welcome news for smokers who want to build up their defenses in case they contract the virus. Though it may still take many months for a smoker's lungs to heal from damage caused by long-term smoking, your health can noticeably improve in the days and weeks after quitting in ways that could make a difference against the virus. Covid-19 creates an added sense of urgency, and there's enough reason to believe that quitting smoking during the pandemic(流行病)could increases your opportunities of fighting off the virus.
If you make the decision to quit, the cilia(纤毛)in your lungs are one of the first parts of your body to heal. These hair-like projections wave back and forth like a brush as air moves in and out of your lungs. They help your body fight off colds and infection. They also help clear mucus(黏液), so if they're not functioning as well as they should, mucus can build up in the lungs. Your body's tendency to cough during an infection helps inspire the bodily process of clearing out mucus. That's vital in fighting the Covid-19 condition. The elderly are at a greater risk for too much lung fluid that often limits breathing following coronavirus infection because they don't have a strong enough cough to clear it up.
A second short-term gain from quitting smoking comes from reducing ongoing inflammation(炎症)in your body, which can make you infect Covid-19 more easily. Having your lungs in as good of shape as you can in case of a corona virus infection is key.
Besides lung-related issues, quitting smoking can also deliver healthy benefits to the heart that could help prevent possible heart attacks, which are another cause of death in Covid-19 cases. After you quit smoking, your blood becomes thinner and less possible to setting. Heart attacks are less likely. One reason this happens is because smoking makes it harder for the heart to distribute blood throughout the body.
1.What is the use of the lung cilia?
A.Cleaning up the lungs. B.Killing the Covid-19 virus.
C.Predicting lung infections. D.Reducing breathing difficulty.
2.Why are the old at higher risk to the corona virus?
A.They cannot go out during the pandemic. B.There is too much mucus in their lungs.
C.Most of them are heavy smokers for years. D.They are lacking in the care of their children.
3.What good does quitting smoking do to heart?
A.Strengthen the heart muscle. B.Turn blood to be much thicker.
C.Make the blood flow smoother. D.Speed the heartbeat up apparently.
4.What is the text mainly about?
A.Quitting smoking can help defend the Covid-19.
B.Ways to make a difference against corona viruses.
C.The Covid-19 virus is threatening humans worldwide.
D.Protecting the smokers' lungs to heal from damage.
高三英语阅读理解中等难度题查看答案及解析
When more and more women join the WHO, it takes on a new look—as news reports put _____.
A. it B. that C. so D. one
高三英语单项填空中等难度题查看答案及解析
Hello,everybody.Welcome to surf on a new Web site—SCIENCE NEWS FOR KIDS!
Our goal is to offer timely items of interest to kids,accompanied by suggestions for hands on activities,books, articles,Web resources,and other useful materials.
Our emphasis is on making the Web site attractive by offering kids opportunities to comment on and grade the subject matter,get ideas for science projects,and try out math puzzles.At the same time,we offer teachers creative ways of using science news in their classrooms.
The Science News for Kids Web site,supported by several corporations and foundations,strengthens the usefulness of Science News in the middle-school classroom and offers entertaining reading and activities for students interested in science.
A section of the Science News for Kids Web site is devoted to particular interests.At present,we have six such zones: a weekly brainteaser(难题)for those who enjoy solving and inventing puzzles (PuzzleZone),entertaining science-fiction composition exercises for those interested in writing (SciFiZone),and weekly science short description along with science project ideas and tips (ScienceFairZone).The GameZone contains a small selection of logic and memory games.The TeacherZone has materials,including question sheets related to the feature article of the week,so that teachers can bring science news topics to the classroom.The LabZone features a weekly hands on activity or science project idea.In the future,we might add additional zones,for example,for kids interested in robotics,the environment,computers,math,or veterinary(兽医的)medicine and animals.
Contact us at [email protected]. Science News for Kids 1719 N Street,N.W.
Washington,DC 20036 Phone :202-785-2255 Fax: 202-659-0365
1.Science News for Kids is a Web site mainly devoted to____.
A. introductions to the newly-published science books
B. useful teaching materials for teachers in schools
C. electronic games for those interested in computers
D. timely news for children interested in science
2.What makes the Web site an attractive one to the teachers?
A. Offering recreational reading materials in science.
B. Trying out interesting and challenging mathematical puzzles.
C. Offering opportunities to comment on and grade the subject matter.
D. Giving creative ways of using science in classrooms.
3.Which of the following messages can't you find on Science News for Kids?
A. Brazil's air traffic controllers are back at work after a 6-hour strike.
B. Taking a big bite isn't always the best strategy in this two-player game.
C. Astronomers have discovered a “family” of related objects in a region of the solar system.
D. What is one-half of two-thirds of three-quarters of four-fifths of five-sixths of 10,000?
4.Which section of the Web site is suitable to you if you have much imagination and intend to be a writer in the future?
A. PuzzleZone. B. LabZone.
C. SciFiZone. D. ScienceFairZone.
高三英语阅读理解中等难度题查看答案及解析
Have you heard the news________ a high-speed railway between Huangshan and Hangzhou will be under construction soon?
A.that B.which C.whether D.whatever
高三英语单项填空简单题查看答案及解析
Much of the criticism has focused on the railway’s online purchasing system,which has been
unable to _________ the huge demand.
A.take notice of B.attach importance to
C.show preference for D.keep pace with
高三英语单项填空简单题查看答案及解析
After he became conscious, he remembered and on the head with a rod.
A.to attack;hit B.to be attacked;to be hit
C.attacking;be hit D.having been attacked;hit
高三英语单项填空中等难度题查看答案及解析
During the years after the terrorist attack on the World Trade Center, structural engineers have been trying hard to solve a question that would otherwise have been completely unthinkable: Can building be designed to stand catastrophic blasts (攻击;爆破) by terrorists?
Soon after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) traveled to ground zero as part of a project funded by the National Science Foundation. They spent two days beginning the task of formulating (构思) ideas about how to design such structures and to search for clues on how to do so in buildings that were damaged, but still are standing.
“Our objective in visiting ground zero was to go and look at the buildings surrounding the World Trade Center, those buildings that are still standing, but that sustained damage,” said Mr. Bruneau, Ph.D. “Our immediate hope is that we can develop a better understanding as to why those buildings remain standing, while our long-term goal is to see whether earthquake engineering technologies can be married to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks,” he added.
Photographs taken by the investigators demonstrate the monumental damage to the World Trade Center towers and buildings nearby. One building a block away from the towers remains standing, but was badly damaged. “This building is many meters away from the World Trade Center and yet we see a column (柱子) there that used to be part of that building,” explained A. Whittaker, Ph.D. “The column became a missile that shot across the road, through the window and through the floor.”
The visit to the area also brought some surprises, according to the engineers. For example, the floor framing (框架) system in one of the buildings was quite strong , allowing floors that were pierced by tons of falling debris (残砾) to survive. “Good framing systems may provide a simple, but reliable strategy for blast resistance,” he added. Other strategies may include providing alternate paths for gravity loads in the event that a load-bearing column fails. “We also need a better understanding of the mechanism of collapse,” said A. Whittaker. “We need to find out what causes a building to collapse and how you can predict it.”
A. Reinhorn, Ph.D. noted that “earthquake shaking has led to the collapse of buildings in the past. Solutions developed for earthquake-resistant design may apply to blast engineering and terrorist-resistant design. Part of our mission now is to transfer these solutions and to develop new ones where none exist at present.”
1.The question raised in the first paragraph is one _____ .
A. that was asked by structural engineers a month ago
B. that is too difficult for structural engineers a month ago
C. that was never thought of before the terrorist attack
D. that terrorists are eager to find a solution to
2.The column mentioned by Dr. Whittaker _____ .
A. was part of the building close to the World Trade Center
B. was part of the World Trade Center
C. was shot through the window and the floor of the World Trade Center
D. damaged many buildings near the World Trade Center
3.A surprising discovery made by the investigators during their visit to ground zero is that _____.
A. floors in the faraway buildings remained undamaged
B. some floor framing systems demonstrate resistance to explosion
C. complex floor framing systems are more blast resistant
D. floors in one of the buildings were pierced by tons of debris
4. What Dr. Reinhorn said in the last paragraph may imply all the following EXCEPT that _____.
A. blast engineers should develop new solutions for terror-resistant design
B. blast engineering can borrow technologies developed for terror-resistant design
C. solutions developed for earthquake-resistant design may apply to terrorist-resistant design
D. blast engineering emerges as a totally new branch of science
高三英语阅读理解中等难度题查看答案及解析
Despite all the reports of Internet security attacks over the years, including the recent ones on Google’s e-mail service, many people have reacted to the break-ins with a shrug(耸肩).
Mr. Shulman and his company examined a list of 32 million passwords that an unknown hacker stole last month from RockYou, a company that makes software for users of social networking sites like Facebook and MySpace. The list was briefly posted on the Web, and hackers and security researchers downloaded it.
The list provided an unusually detailed window into computer users’ password habits. Typically, only government agencies like the F.B.I. or the National Security Agency have had access to such a large password list.
Some Web sites try to keep back the attackers by freezing an account for a certain period of time if too many incorrect passwords are typed. But experts say that the hackers simply learn to trick the system, by making guesses at an acceptable rate, for instance.
To improve security, some Web sites are forcing users to mix letters, numbers and even symbols in their passwords. Others, like Twitter, prevent people from picking common passwords.
Still, researchers say, social networking and entertainment Web sites often try to make life simpler for their users and are reluctant to put too many controls in place.
Even commercial sites like eBay must weigh the consequences of freezing accounts, since a hacker could, say, try to win an auction(拍卖) by freezing the accounts of other potential buyers.
But owing to the reality of our overcrowded brains, the experts suggest that everyone choose at least two different passwords — a complex one for Web sites where security is vital, such as banks and e-mail, and a simpler one for less risky places, such as social networking and entertainment sites.
Mr. Moss relies on passwords at least 12 characters long, figuring that those make him a more difficult target than the millions of people who choose five- and six-character passwords.
“It’s like the joke where the hikers run into a bear in the forest, and the hiker that survives is the one who outruns his companions,” Mr. Moss said. “You just want to run that bit faster.
59. The underlined sentence “Many people have reacted to the break-ins with a shrug” shows that many people ______.
don’t take seriously the hacker’s break-ins
are worried and frightened at the hacker’s break-ins
don’t know what to do with the hacker’s attacks
are eager to get helps from the experts
60. According to the passage, which of the following web sites needs a more complex password?
A social web site.
An entertainment web site.
A commercial web site.
A government web site.
61. The Internet users are advised to______ in order to keep back the hackers.
mix letters, numbers and symbols as well
choose passwords with at least 12 characters
choose passwords with 5 or 6 characters
choose at least two different passwords
62. Which would be the best title for the passage?
Password, Simple or Complex?
Popular Passwords, High Risk!
Clever Hackers, Stupid Netizens.
Hacker, the Enemy of Internet Security.
高三英语阅读理解简单题查看答案及解析
The Somali robbed frequent attacks on the sea urged the United Nations to all nations to take immediate action.
A. fight for B. apply for C. call on D. wait on
高三英语单项填空中等难度题查看答案及解析