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1. The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland. While they are rare north of 88°, there is evidence _ they range all the way across the Arctic, and as far south as James Bay in Canada. It is difficult to figure out a global population of polar bears as much of the range has been _ (poor) studied; however, biologists calculate that there are about 20,000 - 25,000 polar bears worldwide. Modern methods _ tracking polar bear populations have been employed only since the mid-1980s, and are expensive _ (perform) consistently over a large area. In recent years some Inuit people in Nunavut _ (report) increases in bear sightings around human settletments, leading to a _ (believe) that population are increasing. Scientists have responded by _ (note) that hungry bears may be congregating（聚集）around human settlements, leading to the illusion（错觉） that populations are _ (high) than they actually are. Of _ nineteen recognized polar bear subpopulations, three are declining, six _ (be) stable, one is increasing, and nine lack enough data.
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2. Every year about 40,000 people attempt to climb Kilimanjaro, the highest mountain in Africa. They _ with them lots of waste. The _ might damage the beauty of the place. The glaciers(冰川) are disappearing, changing the _ of Kilimanjaro. Hearing these stories, I'm _ about the place - other destinations are described as "purer" natural experiences. However, I soon _ that much has changed since the days of disturbing reports of _ among tons of rubbish. I find a _ mountain, with toilets at camps and along the paths. The environmental challenges are _ but the efforts made by the Tanzania National Park Authority seem to be _. The best of a Kilimanjaro _, in my opinion, isn't reaching the top. Mountains are _ as spiritual places by many cultures. This _ is especially evident on Kilimanjaro as _ go through five ecosystems (生态系统) in the space of a few kilometers. At the base is a rainforest. It ends abruptly at 3,000 meters, _ lands of low growing plants. Further up, the weather _ - low clouds envelope the mountainsides, which are covered with thick grass. I _ twelve shades of green from where I stand. Above 4,000 meters is the highland _ : gravel (砾石), stones and rocks. _ you climb into an arctic-like zone with _ snow and the glaciers that may soon disappear. Does kilimanjaro _ its reputation as a crowded mountain with lines of tourists ruining the atmosphere of peace? I found the opposite to be true.
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3. Is Fresh Air Really Good for You? We all grew up hearing people tell us to "go out and get some fresh air." _ According to recent studies, the answer is a big YES, if the air quality in your camping area is good. _ If the air you're breathing is clean - which it would be if you're away from the smog of cities - then the air is flled with life-giving, energizing oxygen. If you exercise out of doors, your body will learn to breathe more deeply, allowing even more oxygen to get to your muscles (肌肉) and your brain. Recently, people have begun studying the connection between the natural world and healing (治愈). _ In these places patients can go to be near nature during their recovery. It turns out that just looking at green, growing things can reduce stress, lower blood pressure, and put people into a better mood (情绪). Greenery is good for us. Hospital patients who see tree branches out their window are likely to recover at a faster rate than patients who see buildings or sky instead. _ It gives us a great feeling of peace. _ While the sun's rays can age and harm our skin, they also give us beneficial Vitamin D. To make sure you get enough Vitamin D - but still protect your skin - put on sunscreen right as you head outside. It takes sunscreen about fifteen minutes to start working, and that's plenty of time for your skin to absorb a day's worth of Vitamin D.
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4. During the rosy years of elementary school (小学), I enjoyed sharing my dolls and jokes , which allowed me to keep my high social status. I was the queen of the playground. Then came my tweens and teens, and mean girls and cool kids, They rose in the ranks not by being friendly but by smoking cigarettes, breaking rules and playing jokes on others, among whom I soon found myself. Popularity is a well-explored subject in social psychology. Mitch Prinstein, a professor of clinical psychology sorts the popular into two categories: the likable and the status seekers. The likables plays-well-with-others qualities strengthen schoolyard friendships , jump-start interpersonal skills and, when tapped early, are employed ever after in life and work. Then there's the kind of popularity that appears in adolescence: status born of power and even dishonorable behavior. Enviable as the cool kids may have seemed, Dr. Prinstein's studies show unpleasant consequences. Those who were highest in status in high school, as well as those least liked in elementary school, are "most likely to engage (从事) in dangerous and risky behavior." In one study, Dr. Prinstein examined the two types of popularity in 235 adolescents , scoring the least liked, the most liked and the highest in status bаѕеd оn ѕtudеnt ѕurvеуѕ (调查研究). "Wе fоund thаt thе lеаѕt wеll-lіkеd teens had become more aggressive over time toward their classmates. But so had those who were high in status, It clearly showed that while likability can lead to healthy adjusment , high status has just the opposite effect on us." Dr. Prinstein has also found that the qualities that made the neighbors want you on a play date-sharing, kindness, openness-carry over to later years and make you better able to relate and connect with others. In analyzing his and other research, Dr. Prinstein came to another conclusion: Not only is likability related to positive life outcomes, but it is also responsible for those outcomes, too. "Being liked creates opportunities for learning and for new kinds of life experiences that help somebody gain an advantage," he said.
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5. As data and identity theft becomes more and more common, the market is growing for biometric (生物测量) technologies - like fingerprint scans - to keep others out of private e-spaces. At present, these technologies are still expensive, though. Researc hers from Georgia Tech say that they have come up with a low-cost device (装置) that gets around this problem: a smart keyboard. This smart keyboard precisely measures the cadence (节奏) with which one types and the pressure fingers apply to each key. The keyboard could offer a strong layer of security by analyzing things like the force of a user's typing and the time between key presses. These patterns are unique to each person. Thus, the keyboard can determine people's identities, and by extension, whether they should be given access to the computer it's connected to regardless of whether someone gets the password right. It also doesn't require a new type of technology that people aren't already familiar with. Everybody uses a keyboard and everybody types differently. In a study describing the technology, the researchers had 100 volunteers type the word "touch" four times using the smart keyboard. Data collected from the device could be used to recognize dfferent participants based on how they typed, with very low error rates. The researchers say that the keyboard should be pretty straightforward to commercialize and is mostly made of inexpensive, plastic-like parts. The team hopes to make it to market in the near future.
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6. For Canaan Elementary's second grade in Patchogue, N.Y., today is speech day, and right now it's Chris Palaez's turn. The 8-year-old is the joker of the class. With shining dark eyes , he seems like the kind of kid who would enjoy public speaking. But he's nervous. "I'm here to tell you today why you should… should…" Chris trips on the "-ld," a pronunciation difficulty for many non-native English speakers. His teacher, Thomas Whaley, is next to him, whispering support. "… Vote for… me…" Except for some stumbles, Chris is doing amazingly well. When he brings his speech to a nice conclusion, Whaley invites the rest of the class to praise him. A son of immigrants, Chris started learning English a lttle over three years ago. Whaley recalls (回想起) how at the beginning of the year, when called upon to read, Chris would excuse himself to go to the bathroom. Learning English as a second language can be a painful experience. What you need is a great teacher who lets you make mistakes. "It takes a lot for any student," Whaley explains, "especially for a student who is learning English as their new language, to feel confident enough to say, 'I don't know, but I want to know.' " Whaley got the idea of this second-grade presidential campaign projet when he asked the children one day to raise their hands if they thought they could never be a president. The answer broke his heart, Whaley says the project is about more than just learning to read and speak in public. He wants these kids to learn to boast (夸耀) about themselves. "Boasting about yourself, and your best qualities," Whaley says, "is very dificult for a child who came into the classroom not feeling confident."
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7. Need a Job This Summer? The provincial government and its partners offer many programs to help students find summer jobs. The deadlines and what you need to apply depend on the program. Not a student? Go to the government website to learn about programs and online tools available to help people under 30 build skills, find a job or start businesses all year round. Jobs for Youth If you are a teenager living in certain parts of the province, you could be eligible (符合条件) for this program, which provides eight weeks of paid employment along with training. Who is eligible: Youth 15 — 18 years old in select communities(社区). Summer Company Summer Company provides students with hands-on business training and awards of up to $3,000 to start and run their own summer businesses. Who is eligible: Students aged 15 — 29 , returning to school in the fall. Stewardship Youth Ranger Program You could apply to be a Stewardship Youth Ranger and work on local natural resource management projects for eight weeks this summer. Who is eligible: Students aged 16 or 17 at time of hire, but not turning 18 before December 31 this year. Summer Employment Opportunities (机会) Though the Summer Employment Oporonitites program, students are hired each year in a variety of summer positions across the Provincial Public Service, its related agencies and community groups. Who is eigile: Students aged 15 or older. Some positions require students to be 15 to 24 or up to 29 for persons with a diability.
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