In the past, the term "accident" was often used when referring to an unplanned, unwanted e
A、Accident
B、Incident
C、皆可使用
D、随机使用
A、Accident
B、Incident
C、皆可使用
D、随机使用
The primary purpose of paragraph I is to ______.
A.summarize past research and introduce a new study
B.describe a historical period
C.emphasize the advantages of one theory over another
D.define a term and illustrate it with an example
The purpose of studying past exam papers is to
A.do well in the end of term exam.
B.contribute to the learning circle.
C.compare answers of past papers with other students.
The primary purpose of paragraph 1 is to ______.
A.summarize past research and introduce a new study
B.describe a historical period
C.emphasize the advantages of one theory over another
D.define a term and illustrate it with an example
The primary purpose of Paragraph is to ______ .
A.summarize past research and introduce a new study
B.describe a historical period
C.emphasize the advantages of one theory over another
D.define a term and illustrate it with an example
A.Tense
B.Time
C.Mood
D.Aspect
A、Lily’s refusal of a tip: Gabriel’s failure as a gentleman
B、Miss Ivors’ use of the abusive term “West Briton”: Gabriel’s failure as a gentleman
C、Gretta’s withdrawal into the past and her revelation about her old lover
D、Gabriel’s failure at his after-dinner speech
Here is what Professor Wellman means. Before the invention of the Internet and e-mail, our social networks involved live interactions with relatives, neighbors, and colleagues at work. Some of the interaction was by phone, but it was still voice to voice, person to person, in real time.
A recent research study by the Pew Internet and American Life Project showed that for a lot of people, electronic interaction through the computer has replaced this person-to-person interaction. However, a lot of people interviewed for the Pew study say that's a good thing. Why?
In the past, many people were worried that the Internet isolated us and caused us to spend too much time in the imaginary world of the computer. But the Pew study discovered that the opposite is true. The Internet connects us with more real people than expected helpful people who can give advice on careers, medical problems, raising children, and choosing a school or college. About 60 million Americans told Pew that the Internet plays an important role in helping them make major life decisions.
Thanks to the computer, "networked individuals" are able to be alone and together with other people—at the same time .
The Pew study was conducted in______.
A.The United States
B.Canada
C.The U. S. and Canada
D.Europe
Climate change is one of the most important environmental issues facing humankind. Understanding the potential impacts of climate change for natural ecosystems is essential if we are going to manage our environment to minimize the negative consequences of climate change and maximize the opportunities that it may offer. Because natural ecosystems are complex, nonlinear systems, it follows that their responses to climate change are likely to be complex. Climate change may affect natural ecosystems in a variety of ways. In the short term, climate change can alter the mix of plant species in land ecosystems such as grasslands. In the long term, climate change has the potential to dramatically alter the geographic distribution of major vegetation types--savannas, forests, and tundra. Climate change can also potentially alter global ecosystem processes, including the cycling of carbon, nitrogen, phosphorus, and sulfur. Moreover, changes in these ecosystem processes can affect and be affected by changes in the plant species of the ecosystem and vegetation type. All of the climate change-induced alterations of natural ecosystems affect the services that these ecosystems provide to humans.
The global average surface temperature increase of half a degree Celsius observed over the past century has been in part due to differential changes in daily maximum and minimum temperatures, resulting in a narrowing of the diurnal temperature range. Decreases in the diurnal temperature range were first identified in the United States, where large-area trends showed that maximum temperatures have remained constant or increased only slightly, whereas minimum temperature have increased at a faster rate. In this issue, Alward et al. report on the different sensitivities of rangeland plants to minimum temperatures increases.
Which of the following is NOT mentioned as a reason for the global warming?
A.The burning of fuels such as coal or oil.
B.The clearing of forests.
C.The cultivation of farmland.
D.The negative consequences of human activities.
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