最近某高中拟开展以“校园拒绝零食”为主题的活动。假如你是该校学生会主席，请你以学生会的名义，参考下面的内容提示，给全校学生写一封倡议书。
内容提示： 1．描述吃零食的现象；
2．阐述吃零食的影响；
3．提出合理化的建议。
注意： 1．词数80-100，开头已为你写好(不计入总词数)。
2．参考词汇：snacks零食；phenomenon现象。
Dear fellow students,
There is a serious phenomenon in our school.
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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。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。
Dear Liu Jun,
How are you? I have studied in Detroit for almost one year, when the teachers and students are very friend with me. With their help, I’ve made a great progress in my studies. The climate isn’t what I expect. I have never gone through such a cold winter. However, I have gradually adapted me to it. Detroit, whose industry is famous, belongs to the developed world. All kind of lights on at night, Detroit is extreme beautiful. The people there live at a fast pace. They are always on the go, so they have less time chat with each other.
How is everything with you? I’d like to hear about you soon.
Yours,
Li Hua
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
Scientists have discovered that1._________(stay) in the cold could help us lose weight. Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat — the type of fat that produces heat and keeps us warm. Brown fat burns energy, 2._________ helps us lose weight. White fat stores extra energy, which results 3.____ weight gain. The researchers said that because air conditioning and heating give us constant, 4.__________ (comfort) temperatures, our body's need for brown fat has decreased. They found that: "Outdoor workers in northern Finland who 5._______(expose) to cold temperature have 6._____significant amount of brown fat when 7.________(compare) to same-aged indoor workers."
The research was conducted on two different control groups of mice. 8.__________ group was injected with the protein that helps create brown fat. This group later gained 30% less weight after both groups were fed high-fat diets. The researchers say this could be good news in the fight against obesity. People who are obese have 9. (low) levels of brown fat than thinner people. Head researcher Hei Sook Sul said: "This protein could become an important target for research into the treatment and prevention of obesity and obesity-related diseases." She added: "If you can somehow increase levels of this protein, you could 10._________(possible) lose more weight even if eating the same amount of food."
根据短文内容，从选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
Retired or not?
Is retirement harmful to your health?
It’s an interesting question in light of a new study that finds senior citizens who work are in better health than their counterparts who don’t.
Researchers from the University of Miami examined data on more than 83,000 Americans. All of them were at least 65 years old. 1. The majority of these workers ―61 percent―held white collar positions.
Compared to people with white-collar jobs, those who were unemployed or retired were 2.75 times more likely to report their health as “poor” or “fair.”
2. For example, the survey included information on serious conditions like cancer and heart disease. Compared to those with white-collar jobs, those who were unemployed or retired were 49 percent more likely to have a history of at least two of these health problems.
Finally, interviewers asked whether people needed any assistance or special equipment to do things like stand, walk or climb stairs. 3. .
“Being unemployed or retired was associated with the greatest risk of poor health across all health status measures. 4. ”, the study authors concluded.
The results don’t show that working past retirement age is what made senior citizens with jobs healthier than their non-working neighbors. 5. This also makes them sad.
Still understanding the health benefits connected with working past age 65 could motivate business to find ways to hire older workers even if they have some limitations, researchers wrote.
A. People were amazed at the results.
B. Older Americans with jobs also ranked higher on health.
C. 13 percent of them were still working part time or full time.
D. Even after controlling for smoking, people still can’t be healthy.
E. Most retired Americans are reported to be unhealthy for some reason.
F. Retired seniors were 88 percent more likely than white-collar workers to have limitations.
G. Indeed, the authors stated that health problems force some people to drop out of the work.
They are the little sweeties who look pretty cute in a photo, or when sleeping—but a lot less appealing at 30, 000 ft, crying loudly in the seat right next to you.
According to a new survey, almost seven in ten Britons dislike flying with babies so much that they would like to see child-free areas introduced on planes. As for long-distance flights where people want to sleep, almost one in four British travelers believes that no-kid-zones should be fixed as required sections.
The survey was conducted by bookings website LateDeals.co.uk, with 1,108 UK consumers questioned as to what they hate most about air travel.
And our dislike of noisy children and babies on planes runs deep, it seems.
More than a third of us—35 percent—would pay extra to travel on a childless service.
Long-distance passengers would be prepared to pay an additional ￡63 to the cost of a return ticket if it meant adults only on board. And on short-distance flights, an extra ￡28 on the price of a return fare would be considered good value if it guaranteed an absence of angry babies in the middle of the economy-class aisle(走道).
However, screaming babies are not the only source of annoyance for British travelers. In fact, according to the research on the most annoying types of airline passengers, a crying baby ranks as only the fourth. Over half of those surveyed—58 percent—selected “drunk travelers” as their pet peeves. People with “bad personal hygiene(卫生)” and travelers who kick the back of the seat in front were also near the top of the list, causing anger to 48 and 47 percent of us respectively(分别地).
Crying babies came in at fourth on the list, a pet peeve for 43 percent of those surveyed.
1.Britons dislike flying with babies because they_________.
A. make too much noise
B. get angry easily
C. sleep right next to them
D. stay in the economy-class aisle
2.How many British travelers surveyed would like to have no-kid-zones on planes?
A. About 35％.B. About 43％.
C. About 70％.D. About 58％.
3.What type of writing is this text?
A. A brochure.B. A tourist guide.
C. An announcement.D. A news report.
4.What does the underlined phrase “pet peeves” in the last fourth line mean?
A. Pets on a plane.
B. Passengers with a baby.
C. People who annoy you.
D. People who were surveyed.
As more people use smart phones to pay bills and store personal information, strict password security has become more important than ever. A new study shows that free-form gestures–sweeping fingers in shapes across the screen of a smart phone—can be used to unlock phones. These gestures are less likely to be observed and reproduced by others than traditional typed passwords.
“All that it takes to steal a password is a quick eye,” said one of the researchers of the study. “With all the personal information we have on our phones today, improving their security is becoming increasingly necessary.” In developing a secure solution to this problem, the researchers studied the practicality of using free-form gestures. With the ability to create any shape in any size and location on the screen, the gestures were popular as passwords. Since users create them without following a template, the researchers predicted these gestures would allow for greater complexity.
The researchers carried out a create-test-retest experiment where 63 people were asked to create a gesture, recall it, and recall it again 10 days later. The gestures were captured on a recognizer system designed by the team. Using this data, they tested the complexity and accuracy of each gesture using information theory. The result of their analysis is that people are favorable to use free-form gestures as passwords.
To put their analysis into practice, the researchers then had seven students in computer science and engineering, each with considerable experience with touchscreens（触摸屏）, attempt to steal a free-form gesture password by observing a phone user secretly. None of them were able to copy the gestures with enough accuracy. The gestures appear to be extremely powerful against attacks.
Though the testing is in its early stage and widespread adaptation of this technology is not yet clear, the research team plans to continue to analyze the security and management of free–form passwords in the future. They believe this is the first study to explore free-form gestures as passwords. They will soon publish their findings.
1.What can we learn about free-form gestures?
A. They are improving mobile security in a way.
B. Users will have to make use of simple gestures.
C. They will never be copied by others.
D. Users must move their fingers in fixed shapes.
2.The experiment in paragraph 4 is to test _________ of free - form gestures.
A. templateB. applicationC. accuracyD. security
3.According to the text, the researchers think that ________.
A. it is easy to steal any password with a quick eye
B. better ways of setting passwords should be developed
C. people had better not use smart phones to pay bills
D. personal information should not be stored in a phone
4.The main purpose of the text is to ________.
A. advise people to use free-form gestures
B. discuss whether smart phones are safe
C. talk about the practicality of passwords
D. introduce the study of a new password
