单选题The people of Kiribati worry that one day their country will be taken away by a sudden high tide.

单选题There is no risk to public health.

单选题It is postulated that a cure for the disease will have been found by the year 2000.

单选题Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.

单选题Vibrating Rubber Cellphones Vibrating rubber cellphones could be the next big thing in mobile communications. They allow people to press the phone to transmit vibrations along with their 16 words. According to a research team at the MIT Media Lab in Cambridge, Massachusetts, the idea will make 17 more fun. Many mobile phones can already vibrate instead of ringing 18 you do not want people to know you are getting a call. But these 19 are too simple for subtle (敏感的) communication, 20 Angela Chang of the lab"s Tangible Media Group. "They"re either on or off," she says. But when you hold Chang"s rubber cellphone, your fingers and thumb wrap around five 21 speakers. They vibrate 22 your skin around 250 times per second. Beneath these speakers sit pressure sensors (传感器), so you can transmit vibration as well as 23 it. When you squeeze with a finger, a vibration signal is transmitted 24 your caller"s corresponding finger, its speed 25 on how hard you squeeze. Chang says that within a few minutes of being given the phones, students were using the vibration feature to 26 emphasis to what they were saying. Over time, people even began to transmit their own kind of ad hoe (特别的) "Morse code", which they would repeat back to show they were 27 what the other person was saying. Chang thinks "vibralanguages" could function for the same 28 as texting: sometimes people want to communicate 29 without everyone nearby knowing what they"re saying. "And 30 actually being able to shake someone"s hand when you close a business deal," she says.

单选题More Than a Ride to School The National Education Association claims. "The school bus is a mirror of the community." They further add that, unfortunately, what appears on the exterior does not always reflect the reality of a chosen community. They are right, sometimes it reflects more! Just ask Liesl Denson. Riding the school bus has been more than a ride to school for Liesl. Bruce Hardy school bus driver for Althouse BUS Company has been Liesl's bus driver since kindergarten. Last year when Liesl's family moved to Parkesburg, knowing her bus went by her new residence, she requested to ride the same bus. This year Liesl is a senior and will enjoy her last year riding the bus. She says, "It's been a great ride so far! My bus driver is so cool and has always been a good friend and a good listener. Sometimes when you're a child adults do not think that what you have to say is important. Mr. Hardy always listens to what you have to say and makes you feel important. " Her friends Ashley Batista and Amanda Wolfe agree. Bruce Hardy has been making Octorara students feel special since 1975. This year he will celebrate 30 years working for Althouse Bus Company, Larry Althouse, president of the company, acknowledges Bruce Hardy's outstanding record: "You do not come by employees like Bruce these days. He has never missed a day of work and has a perfect driving record. He was recognized in 2000 by the Pennsylvania School Bus Association for driving 350,000 accident free miles. Hardy's reputation is made further evident through the relationships he has made with the students that ride his bus." Althouse further adds, "Althouse Bus Company was established 70 years ago and has been providing quality transportation ever since. My grandfather started the business with one bus. Althouse Bus Company is delighted to have the opportunity to bring distinctive and safe service to our local school and community and looks forward to continuing to provide quality service for many more years to come." Three generations of business is not all the company has enjoyed. Thanks to drivers like Bruce Hardy, they have been building relationships through generations, Liesl's mother Carol also enjoys fond memories of riding Bruce Hardy's bus to the Octorara School District.

单选题As a politician, he knows how to {{U}}manipulate{{/U}} public opinion. A. express B. divide C. influence D. voice

单选题This species has nearly {{U}}died out{{/U}} because its habitat is being destroyed. A. turned dead B. passed by C. carried away D. become extinct

单选题 How the Body Keeps the Same Temperature The temperature of your body should be always just the same, no matter whether the weather is hot or cold. That is why the doctor uses his thermometer when you are sick. When you are well,your temperature is ninety-eight and six tenths degrees. If he finds it{{U}} (51) {{/U}}than that,it is a sure sign that something is wrong. The body keeps the same temperature all the time,because it balances (平衡) the heat it produces and{{U}} (52) {{/U}}off. It is always burning up food and producing heat. It can produce heat faster when it needs to or give off heat faster when it becomes too warm. Let's see{{U}} (53) {{/U}}this happens. The heat of your body is given off chiefly through the skin. When you are{{U}} (54) {{/U}},your skin is tight and shows "goose flesh". When you get chilly (寒冷的), you must dance around to keep warm or{{U}} (55) {{/U}}you will shiver (颤抖).{{U}} (56) {{/U}}your muscles begin to work,burn up fuel,and produce more heat. It is not{{U}} (57) {{/U}}to shiver,so you usually prefer warming up by exercise,or put{{U}} (58) {{/U}}more clothes to keep heat in. When you are warm,the skin is loose and soft. It is so supplied{{U}} (59) {{/U}}blood that heat is given off rapidly. If you get too hot,you begin to sweat,and{{U}} (60) {{/U}}body heat is used in evaporating (蒸发) the moisture (潮湿) from your skin. You wear less clothing, too,in warm {{U}}(61) {{/U}}or in a warm room,so that warmth can be given off freely. You feel you don't{{U}} (62) {{/U}} exercising because your body is warm{{U}} (63) {{/U}},and the extra heat produced by exercise makes you uncomfortable. You can see from this why you{{U}} (64) {{/U}}differently in different kinds of weather. In summer when it is warm,you feel tired and lazy. You do not care to work or play,but enjoy lying and doing nothing. When you get out of doors in winter,the cold air makes you feel{{U}} (65) {{/U}}. You want to run and play.

单选题阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}}Avalanche and Its Safety{{/B}} An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are{{U}} (51) {{/U}}the biggest dangers in the mountains for both life and property. All avalanches are caused by an over-burden of material, typically snowpack, that is too massive and unstable for the slope{{U}} (52) {{/U}}supports it. Determining the critical load, the amount of over-burden which is{{U}} (53) {{/U}}to cause an avalanche,{{U}} (54) {{/U}}a complex task involving the evaluation of a number of factors. Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low{{U}} (55) {{/U}}of avalanche. Snow does not{{U}} (56) {{/U}}significantly on steep slopes; also, snow does not{{U}} (57) {{/U}}easily on flat slopes. Human-triggered avalanches have the greatest incidence when the snow's angle of rest is{{U}} (58) {{/U}}35 and 45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is 38 degrees. The rule of thumb is: A slope that is{{U}} (59) {{/U}}enough to hold snow but steep enough to ski has the potential to generate an avalanche, regardless of the angle. Additionally, avalanche risk increases with{{U}} (60) {{/U}}; that is, the more a slope is disturbed by skiers, the more likely it is that an avalanche will occur. Duc to the complexity of the subject, winter travelling in the backcountry is never 100% safe. Good avalanche safety is a continuous{{U}} (61) {{/U}}, including route selection and examination of the snowpack, weather{{U}} (62) {{/U}}, and human factors. Several well-known good habits can also{{U}} (63) {{/U}}the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid{{U}} (64) {{/U}}to. Never follow in the tracks of others without your own evaluations; snow conditions are almost certain to have changed since they were made. Observe the terrain and note obvious avalanche paths where plants are{{U}} (65) {{/U}}or damaged. Avoid traveling below others who might trigger an avalanche.

单选题She seemed to have detected some anger in his voice.

单选题There is always excitement at the olympic Games when an athlete Ubreaks/U a record.

单选题She eventually married the most persistent one of her admirers.

单选题Environmental Protection The destruction of our natural resources and contamination of our food supply continue to occur, largely because of the extreme difficulty in affixing (把…固定) legal responsibility on those who continue to treat our environment with reckless abandon (放任). Attempts to prevent pollution by legislation, economic incentives and friendly persuasion have been met by lawsuits, personal and industrial denial and long delays-not only in accepting responsibility, but more importantly, in doing something about it. It seems that only when government decides it can afford tax incentives or production sacrifices, there is any initiative for change. Where is industry's and our recognition that protecting mankind's great treasure is the single most important responsibility? If ever there will be time for environmental health professionals to come to the frostiness and provide leadership to solve environmental problems, that time is now. We are being asked, and, in fact, the public is demanding that we take positive action. It is our responsibility as professionals in environmental health to make the difference. Yes, the ecologists, the environmental activists and the conservationists serve to communicate, stimulate thinking and promote behavioral change. However, it is those of us who are paid to make the decisions to develop, improve and enforce environmental standards, I submit, who must lead the charge. We must recognize that environmental health issues do not stop at city limits, county lines, state or even federal boundaries. We can no longer afford to be tunnel-visioned in our approach. We must visualize issues from every perspective to make the objective decisions. We must express our views clearly to prevent media distortion and public confusion. I believe we have a three-part mission for the present. First, we must continue to press for improvements in the quality of life that people can make for themselves. Second, we must investigate and understand the link between environment and health. Third, we must be able to communicate technical information in a form that citizens can understand. If we can accomplish these three goals in this decade, maybe we can finally stop environmental degradation, and not merely hold it back. We will then be able to spend pollution dollars truly on prevention rather than on bandages.

单选题Parents have become increasingly Uconcerned about/U the television viewing habits of their children.

单选题Senator James Meeks has called off a boycott of Chicago Public Schools, organized to protest Illinois' education funding system.A. reclaimedB. proposedC. indulgedD. canceled

单选题These are defensive behavior patterns which derive from our fears.

单选题Please put up your bands if you have any questions.A. raiseB. reachC. waveD. fold

单选题The laws which the new government Uimposed/U on the population were very harsh.

单选题The council meeting terminated at 2 o"clock.