________the American economy expanded at an a...

________the American economy expanded at an annual rate of 2.5 percent in July—September, it faced a long road to recovery.

A．Since　    B．If

C．While　    D．When

高三英语单项填空中等难度题查看答案及解析

Road networks are expanding worldwide at an alarming rate. Although roads can promote economic development and improve human welfare, they can also have severe effects on wildlife populations by worsening habitat and human disturbance. Moreover, traffic disturbance from noise, lights, and motion reduces the quality of habitat near roads.

While roads are now everywhere across much of the earth, the construction of new roads will be concentrated in areas with high biodiversity value. Many of these new roads and highways will likely cross reserves or other highly biodiverse areas. Although roads are one of the most important impacts on global ecosystems, we know little about how patterns in road construction will affect biodiversity in the coming decades.

Here, we use a recently developed global roads data set to investigate the extent and potential influence of road networks across the 1,160,000-km,13-country range of the globally endangered tiger. In the Russian Far East, for example, roads reduce tiger survival rates due to crashes into vehicles. In some regions, tigers avoid areas closer to public roads, suggesting that roads act as important barriers to movement. The emerging impacts of road development on tigers are critical for several reasons.

We calculate road density (度), distance to the nearest road, and relative mean species abundance (MSA) to characterize how road networks influence tiger habitats. These systems of measurement provide starting points for range-wide monitoring and impact assessments of road development projects, thus enabling evaluation of progress toward country-level conservation and sustainable (可持续的) development goals.

1.What is the second paragraph mainly about?

A.The importance of creating reserves.

B.The destruction to global ecosystems.

C.The effect on biodiversity worldwide.

D.The opinion about road construction.

2.Why is road development attacked?

A.It has bad influence on tigers.

B.It causes more traffic accidents.

C.It covers too many areas.

D.It requires a quantity of funds.

3.How does the author feel about the systems of measurement?

A.Optimistic. B.Doubtful.

C.Concerned. D.Astonished.

4.In which section of a website may the text appear?

A.Entertainment. B.Health.

C.Education. D.Science.

高三英语阅读理解困难题查看答案及解析

As the population of the world is growing at the disturbing rate of 10，000 people an hour, nature is beginning to ________ us.

A. turn against　　 B. turn up　　 C. turn off　　 D. turn around

高三英语单项填空中等难度题查看答案及解析

172. Since the disaster of September 11, American economy has got into a jam. The underlined part probably means _____.

高三英语单项填空简单题查看答案及解析

One night，at 1130 p．m.，an older African American woman was standing on the side of an Alabama highway trying to endure a lashing rainstorm.Her car had broken 1.______and she desperately needed a ride.Soaking (湿透) wet，she 2.______(decide) to flag down the next car.A young white man stopped 3._____(help) her—generally unheard of in those conflict­filled 1960s.The man took her to 4._____(safe)，helped her get assistance and put her into a taxicab.She seemed to be in a big hurry，but wrote down his address，thanked 5._______.

Seven days went by and 6._____knock came on the man’s door. 7._____his surprise，a giant console color TV was delivered to his home.A special note was attached.It read，“Thank you so much 8.________assisting me on the highway the other night.The rain drenched (湿透) not only my clothes9._______ my spirits.Then you came along.Because of you，I was able to make it to my 10._______(die) husband’s bedside just before he passed away.God bless you for helping me and unselfishly serving others.”

高三英语其他题中等难度题查看答案及解析

For an increasing number of students at American universities, Old is suddenly in. The reason is obvious: the graying of America means jobs, coupled with the aging of the baby-boom generation, a longer life span means that the nation's elderly population is bound to expand significantly over the next 50 years. By 2050, 25 percent of all Americans will be older than 65, up from 14 percent in 1995. The change poses profound questions for government and society, of course. But it also creates career opportunities in medicine and health professions, and in law and business as well. "In addition to the doctors, we're going to need more sociologists, biologists, urban planners and specialized lawyers," says Professor Edward Schneider of the University of Southern California's (USC) School of Gerontology (老年学).

Lawyers can specialize in "elder law," which covers everything from trusts and estates to nursing-home abuse and age discrimination (歧视). Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees in human history. "Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree will have a license to print money," one professor says.

Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was "really bored with bacteria." So she took a class in gerontology and discovered that she liked it. She says, "I did volunteer work in retirement homes and it was very satisfying."

1."...Old is suddenly in" (Line 1, Para. 1) most probably means "________".

A. America has suddenly become a nation of old people

B. gerontology has suddenly become popular

C. more elderly professors are found on American campuses

D. American colleges have realized the need of enrolling older students

2.With the aging of America, lawyers can benefit ________.

A. from the adoption of the "elder law"

B. from giving special services to the elderly

C. by enriching their professional knowledge

D. by winning the trust of the elderly to promote their own interests

3.Why can businessmen make money in the emerging elder market?

A. Retirees are more generous in spending money.

B. They can employ more gerontologists.

C. The elderly possess an enormous purchasing power.

D. There are more elderly people working than before.

4.Who can make big money in the new century according to the passage?

A. Retirees who are business-minded.

B. The volunteer workers in retirement homes.

C. College graduates with an MBA or law degree.

D. Professionals with a good knowledge of gerontology.

5.It can be seen from the passage that the expansion of America's elderly population ________.

A. will provide good job opportunities in many areas

B. will place an unbearable burden on society

C. may lead to nursing home abuse and age discrimination

D. will create new fields of study in universities

高三英语阅读理解中等难度题查看答案及解析

In an economy 　　 income per head used to rise by barely 1% a year, current growth rates feel like a miracle.

A. when 　　　　 B. whose　　　　 C. that 　　　　 D. where

高三英语单项填空简单题查看答案及解析

In an economy ________income per head used to rise by barely 1% a year, current growth rates feel like a miracle.

A．when　    B．whose

C．that　    D．where

高三英语单项填空中等难度题查看答案及解析

Lawmakers in the United States have expanded an investigation into the use of location-tracking systems on mobile devices． The action follows recent reports about the storing of information on the Apple iPhone． Some people consider location tracking to be a threat to personal privacy and security．

Allan Friedman, the research director, says, “All wireless companies do some location tracking as part of their networks． This information is usually stored by the companies, not the devices, and there are laws to protect it． Law enforcement（执法） agencies, for example, have to have a fairly high standard before it can access that data． And the phone company is also prohibited from selling that information．

Now, two researchers report that location tracking information is being stored directly on Apple devices． They said Apple’s newest operating systems gather global positioning system and timestamp information． The information is stored on the device in a file that is also uploaded （上传） to any computer that the device is connected to． The researchers say the information is available to anyone who has access to the device or computer．

Allan Friedman says, “This raises additional concerns． There’s the idea that because it’s on my phone and on my computer, rogue applications（恶意程序） that I pay for or that I’m tricked into downloading may be able to access this data and somehow misuse it．”

Apple says it is “not tracking the location of your iPhone”． It is simply keeping a database of Wi-Fi hotspots and cellphone towers near the user’s location． This information is meant to help the iPhone quickly find its location when needed．

Letters have been sent to some of the leading mobile device developers, including Apple and Google． The letters asked for more information about their location tracking systems． Allan Friedman calls this an important start to strengthening privacy laws． He says, “There aren’t strong controls over things like location information, what they are doing with it, how long they are keeping it． And perhaps the most important question is, is my location data with other facts about me?”

1.Why did American lawmakers investigate the use of location-tracking systems on cell-phones?

A.Because the systems can store users’ information

B.Because many users have suffered loss after using them．

C.Because it is thought to threaten users’ privacy．

D.Because many reporters have shown the problem of the systems．

2. Allan Friedman believes that ________．

A.wireless companies focus on personal privacy．

B.people are forbidden to get access to private data at will

C.phone companies may sell private information secretly

D.customers may ask wireless companies to locate their tracking

3. What do we know from Paragraph 3?

A．  Location tracking information is stored online．

B.Apple’s newest operating systems collect all kinds of information．

C.Location tracking information may be uploaded to any iPhone．

D.Apple’s newest operating systems may reveal the private information of users．

4.Which of the following statements is TRUE according to the passage?

A.Apple denies that it tracks the location of users．

B.The researchers may misunderstand the Apple’s systems．

C.The global positioning system is to blame for rogue applications．

D.The iPhone can quickly find its location by using its user’s information．

高三英语阅读理解中等难度题查看答案及解析

The world’s native languages are dying out at an unprecedented(空前的) rate, taking with them irreplaceable(不能替代的) knowledge about the natural world, according to a new study.

The study identified five global “hot spots” where languages are vanishing faster than anywhere else ---- eastern Siberia, northern Australia, central South America, the US state of Oklahoma and the US Pacific Northwest. “Languages are suffering a global extinction crisis that greatly goes beyond the pace of species extinction,” linguistics(语言学的) professor David Harrison noted, who said half of the world’s 7,000 languages were expected to disappear before the end of the century.

Native people had an intimate(详尽的) knowledge of their environment that was lost when their language disappeared, along with other certain things often unfamiliar to us, Harrison stressed. “Most of what we know about species and ecosystems is not written down anywhere, it’s only in people’s heads,” he said. “We are seeing in front of our eyes the loss of the human knowledge base.”

Harrison was one of a team of linguists who carried out the study. The researchers traveled to Australia this year to study native languages, some of the most endangered. According to Harrison, in Australia, they were heartened to see a woman in her 80s who was one of the only three remaining speakers of the Yawuru language passing on her knowledge to schoolchildren. He said such inter-generational exchanges were the only way native languages could survive. “The children had elected to take this course, no one forced them,” he said. “When we asked them why they were learning it, they said,‘This is a dying language, we need to learn it’.” Also, while there they found a man with knowledge of the  Amurdag  language, which had previously been thought extinct.

The researchers said all five of the hot spots identified were areas that had been successfully colonized and where a dominant language such as Spanish or English was threatening native tongues.

1.What does this text mainly talk about?

A. A study on native languages endangered.

B. The knowledge of native languages.

C. People’s efforts in saving native languages.

D. Harrison and his study on languages.

2.The underlined word“vanishing”in the second paragraph can be best replaced by________.

A. developing   B. changing        C. increasing     D. Disappearing

3.According to Harrison, language extinction________.

A. causes the researchers lots of worries

B. speeds up the pace of species extinction

C. threatens the existing of Spanish and English

D. brings about a loss of knowledge about the environment

4.Which of the following can be described as good news?

A. Native languages became less endangered in Australia.

B. A man was found with knowledge of the Amurdag language.

C. Researchers were well received by native people in Australia.

D. Many schoolchildren showed interest in the Yawuru language.

高三英语阅读理解中等难度题查看答案及解析