Road networks are expanding worldwide at an a...

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

________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

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

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式

Most of us are familiar with the “Silk Road”, a network of land trading routes which connected northwestern China to Europe since the Han dynasty. With its recent 1. (popular), you may have heard of the “Ancient Tea Horse Road” as well, another network of land trading routes that connected China to various 2. (part) of Asia and Europe before sailing became common. Historically, the “Ancient Tea Horse Road” is no less 3. (value) than the “Silk Road”. And because of their respective locations, sometimes the “Ancient Tea Horse Road”4.(refer) to as the “Southern Silk Road”.

The “Ancient Tea Horse Road” got its name as Chinese tea and horses were the main products 5. (buy) and sold along the route. Historians have traced the origins of the “Ancient Tea Horse Road” back to the Tang dynasty, 6. tea was being transported out of Yunnan to Beijing, Tibet, and other places. The “Ancient Tea Horse Road” was 7. (far) developed during the Song and Ming dynasties, and remained 8. busy trading route all year round until the Qing dynasty.

The “Ancient Tea Horse Road” serves 9. not only a trading route, but also a bridge connecting different races -- such as Han and the Tibetan people. It is located near the “Roof of the World”, and is where many minority groups are located, 10. (make) it a spot of many attractions.

高三英语语法填空中等难度题查看答案及解析

The project, 　 　　 by the end of 2033, will expand the city’s telephone network to cover 2,000,000 users.

A. being accomplished　　 B. accomplished

C. to be accomplished　　 D. having been accomplished

高三英语单项填空中等难度题查看答案及解析

The project ______ by the end of 2020, will expanded the city’s telephone network to cover 2,000,000 users.

A. being accomplished                                                     B. to be accomplished

C. accomplished                                                                          D. having been accomplished

高三英语单项填空中等难度题查看答案及解析

The project _________ by the end of 2011, will expand the city’s telephone network to cover 2000000 users.

A．being accomplished             B．accomplished

C．to be accomplished                 D．having been accomplished

高三英语单项填空中等难度题查看答案及解析

The project ________ (accomplish) by the end of 2014 will expand the city's network to cover 2,000,000 users.

高三英语其他题中等难度题查看答案及解析

How Smartphone Adds to Your Weight

Using a smartphone at mealtimes can lead to an expanding waistline. Researchers have found that men and women consumed 15% more calories when looking at their phones while eating. 1. The groundbreaking study suggests that staring at a phone screen may distract (分心) dinners from how much food and what they are actually eating.

“It may prevent the correct understanding of the brain over the amount of food ingested,” said researchers who filmed 62 volunteers eating alone.

The volunteers, aged 18 to 28, were divided in to three groups and invited to help themselves to a choice of food — ranging from healthy options to soft drinks and chocolate — until they were satisfied. 2. On average, the volunteers ate 535 calories without the distraction of a smartphone but 591 when using a mobile. Those in the sample who were classed as overweight ate 616 calories while using their phones. When in possession of their mobiles, the volunteers also consumed 10 percent more fatty foods. 3.

“Smartphone use during a meal increased calorie and fat intake,” said Márcio Gilberto Zangeronimoa, a lead author of the study — carried out at the Federal University of Lavras in Brazil and University Medical Center Utrecht in the Netherlands. He added: “Tablets and smartphones have become the main ‘distracters’ during meals, even early in childhood. 4.A distracter prevents the brain correctly understanding the amount of food accepted.”5. A more detailed analysis can be found in the journal.

A.They also eat more fatty food.

B.They also ate more when reading a magazine.

C.Distracted or hurried eating can add to weight gain.

D.The study is published in Physiology And Behavior.

E.It is important to pay attention to how this may impact food intakes.

F.Hunger isn’t the only thing that influences how much we eat during the day.

G.They were recorded eating with no distractions, using a smartphone or reading a magazine.

高三英语七选五中等难度题查看答案及解析

At present, there are many instances　　　　　 the governments distribute money to the citizens worldwide, but the sources of fund are still limited.

A.how B.which C.where D.when

高三英语单项填空中等难度题查看答案及解析