The argument that human-caused carbon emissions(排放) are merely a drop in the bucket compared to greenhouse gases generated by volcanoes has been making its way around the rumor mill for years. And while it seems to be reasonable, the science just doesn't back it up.
According to the US Geological Survey (USGS), the world's volcanoes, both on land and undersea, generate about 200 million tons of carbon dioxide (CO2) annually, while our automotive and industrial activities cause some 24 billion tons of CO2 emissions every year worldwide. Despite the arguments to the contrary, the facts speak for themselves: Greenhouse gas emissions from volcanoes compose less than one percent of those generated by today's human activities.
Another indication that human emissions surpass those of volcanoes is the fact that atmospheric CO2 levels, as measured by sampling stations around the world, have gone up consistently year after year regardless of whether or not there have been major volcanic eruptions in specific years. “If it were true that individual volcanic eruptions dominated human emissions and were causing the rise in carbon dioxide concentrations, then these carbon dioxide records would be full of spikes —one for each eruption,” says Coby Beck, a journalist writing for online environmental news. “Instead, such records show a smooth and regular trend.”
Furthermore, some scientists believe that volcanic eruptions, like that of Mt.St. Helens in 1980 and Mt. Pinatubo in 1991, actually lead to short-term global cooling, not warming, as sulfur dioxide (SO2), ash and other particles in the air and stratosphere(平流层) reflect some solar energy instead of letting it into Earth's atmosphere. SO2, which converts to sulfuric acid aerosol, when it hits the stratosphere, can linger there for as long as seven years and can exercise a cooling effect long after a volcanic eruption has taken place.
Scientists tracking the effects of the major 1991 eruption of the Philippines’ Mt. Pinatubo found that the overall effect of the blast was to cool the surface of the Earth globally by some 0.5 degrees Celsius a year later, even though rising human greenhouse gas emissions and an El Nino event caused some surface warming during the 1991-1993 study period.
In an interesting twist on the issue, British researchers last year published an article in the peer reviewed scientific journal Nature showing how volcanic activity may be contributing to the melting of ice caps in Antarctica but not because of any emissions, natural or man-made. Instead, scientists Hugh Corr and David Vaughan of the British Antarctic Survey believe that volcanoes underneath Antarctica may be melting the continents ice sheets from below, just as warming air temperatures from human-induced emissions erode them from above.
1.According to Paragraph 1, some people argue that .
A.their opinion is supported by science.
B.volcanoes generate most of the greenhouse gases.
C.human activities are to blame for greenhouse gases.
D.carbon emissions produced by volcanoes are increasing.
2.What does the underlined word “spikes" in Paragraph 3 probably mean?
A.Sudden increases. B.Smooth trends.
C.Stable regularities. D.Sharp declines.
3.What do the scientists mentioned in this passage believe about volcanic eruptions?
A.They brought about global warming.
B.They actually partly cooled the surface of the Earth.
C.They melted the ice sheets in Antarctic from above.
D.They dominated human emissions in greenhouse effect.
4.The purpose of the passage is to .
A.compare the results of the studies.
B.contradict a view held by some people.
C.present new findings for greenhouse phenomenon.
D.report the effects of CO2, in greenhouse phenomenon.
A star athlete at the college where I work recently stopped by my office. After committing a few unforced errors during a weekend match, she was riven by self-criticism. “I’m at peak fitness, and I practice hard. How is this happening?” She asked.
This student believes she should be able to control the outcomes of her life by virtue of her hard work. She has a sense that hours on the field should get her exactly where she needs to go. Many students have similar mentality. When they win, they feel powerful and smart. When they fail, they are crushed by self-blame. If my achievements are mine to control, they reason, my failures must be entirely my fault, too.
We talk often about young adults struggling with failure because their parents have protected them from discomfort. But there is something else at play: a false promise that they can achieve anything if they are willing to work for it.
Psychologists have sourced this phenomenon to a misapplication of “mindset” research, which has found that praising children for effort will increase academic performance. A 2018 analysis found that while praising effort over ability may benefit economically disadvantaged students, it does not necessarily help everyone.
One possible explanation comes from Suniya Luthar, who argued in a research paper that for teens in wealthy, pressure-cooker communities, “it is not a lack of motivation and perseverance (毅力) that is the big problem. Instead, it is unhealthy perfectionism, and difficulty with backing off when they should, when the desire for achievements is over the top.” They push themselves onward in face of impossible goals. A 2007 study found that teens who refused to give up impossible goals showed higher levels of C-reaction protein, a marker of systemic inflammation (全身炎症) linked to heart disease and other medical conditions. A 2014 study showed a connection between the perfectionist tendencies and depression.
The cruel reality is that you can do everything in your power and still fail. Instead of allowing our kids to beat themselves up when things don’t go their way, we adults should help students pursue success in healthier ways in part by redefining failure as a feature, not a bug, of learning. At Smith College where I teach, students are asked to explore how setbacks and missteps made them stronger or more effective. We would be wise to remind our kids that life has a way of sucker-punching (意外打击) us when we least expect it. It’s often the people who learn to say “stuff happens” who get up the fastest.
1.Why was star athlete trapped by self-blame?
A.She broke down during the match.
B.She didn’t try her best in the match.
C.She believed hard work should pay off.
D.She thought she should have practiced harder.
2.What can we learn from Paragraph 5?
A.Lack of motivation and perseverance leads to teens’ failure.
B.Praising children for effort increases academic performance.
C.Children struggle with failure due to parents’ over-protection.
D.Unhealthy perfectionism causes physical and emotional stress.
3.According to the author, adults should _________.
A.help students learn from failure
B.protect students from discomfort
C.reward students for their hard work
D.explore the cause of students’ failure
4.Which of the following does the author probably agree with?
A.Effort equals achievement.
B.Motivation is the key to success.
C.Success is not always under control.
D.Effort is more important than ability.
I live in a second-floor flat with an ancient tree right on the corner of the house. House and tree have been here, side by side, for well over a century. No one really knows how old the tree is, but it was already there when builders started on the house at the beginning of the 1900s.
It was still rather young and flexible back then, so it easily welcomed the new structure into its path. It bent and adjusted itself to make room, and to find the space to grow big and strong and wise, which means that some hundred years later, the solid, strong branches of the tree reach around two full sides of my home. It’s covered in moss（苔藓）, which is, in turn, crawling with all sorts of insects. I have never seen the insects, by the way, I just know that they’re there because of all the birds trying to pick them out. They are always hopping around, looking for this and that and singing songs.
I feel like I have become part of the ecosystem. When I’m eating breakfast or making dinner in the kitchen, I can look out and see a bird hopping around skillfully, gathering its own meal while I tend to mine. When I’m sitting in the living room, reading or drinking tea, I can suddenly find myself face to face with another bird. We’ll be staring at each other and, after some time, decide we can both carry on with our business, living side by side. Even as I write this—the large windows open to a lovely, soft evening—a white feather comes floating down by my side, probably from one of the resident pigeons.
As I don’t have the luxury of a garden, this tree makes me feel connected to the outdoors. Such is an ancient tree, a tree that is itself home to many other creatures—that feels different. It is as if it has adopted me and made me a part of its world, without ever asking for something in return. But if needs be, I know that it can count on me and I will protect it with all my strength.
1.The flat that author lives in is _________.
A.built in an ancient tree B.hugged by a giant tree
C.decorated with branches D.surrounded by a garden
2.In the author’s description, she implies that _________.
A.birds keep her warm company B.she has adopted the residents.
C.moss makes her flat nice and cool D.she has been bothered by the insects
3.What does the author really treasure?
A.A close-to-nature life. B.A luxurious garden.
C.A spacious house. D.A sociable neighbor.
4.Which of the following can be used to express the author’s feeling?
A.Jealous. B.Inferior.
C.Content. D.Passionate.
HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, emails and web pages to rich, bright lab-quality photos—with copy and scan tools too.
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Return & exchange information
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1.Which statement is true of this type of printer?
A.It is a portable printer designed for home and office use.
B.It is a multi-function printer producing high-quality photos.
C.It is an easy-operation printer with a two-year free care pack.
D.It is a wireless-connected printer supported by modified cartridges.
2.Which of the following words best describe its ink cartridges?
A.Cost-effective. B.Unavailable.
C.Automatic. D.Eco-friendly.
3.If you order this type of printer online today, ___________.
A.you can return it without being charged. B.you can save $18.
C.you can get a care pack on discount. D.you will receive it tomorrow.
假定你是李华。你在攀枝花日报上看到一则书法培训课程广告，你在攀枝花学院留学的 外国朋友 John 对中国书法非常感兴趣，于是你给他写封邮件，向他推荐该课程，内容包括：
1、写信原因；
2、培训课程的时间、地点；
3、报名方式及截止日期。
注意： 1. 词数 100 左右，文章开头已给出，不计入总词数;
2. 可以适当增加细节，以使行文连贯。
参考词汇：汉字书法 Chinese Calligraphy
Dear John,
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours
Li Hua
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。作文中共有10 处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧）并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意： 1. 每处错误及其修改均仅限一词；
2. 只允许修改 10 处，多者（从第 11 处起）不计分。
Graduation finally came. My classmates and I made up our mind do something. Someone suggested make a video to record our experiences at school and we agreed. Material collecting took us a whole week, during it we interviewed our teachers and took picture of every aspect of school life. The editing part after that was tough. We debated over what to put them into the video. Some disagreements were unavoidable, and the video turned out perfect. Several days later, when the video was played on a graduation ceremony, it was very popular for everyone. What a wonderfully time the students and teachers shared! That surely gives us a great sense of achievement.
