题目内容
Bob _______ a lot about the dam. He wants ______.
[ ]
A. reads, very much to visit it
B. has read, very much to visit it
C. was knowing, to visit it very much
D. has read, to visit it very much
新课标快乐提优暑假作业陕西旅游出版社系列答案Younger adults who get either little sleep or a lot of it may see a greater expansion in their waistlines（腰围）over time, a study published suggests. Researchers found that among black and Hispanic adults younger than 40, those who typically slept for five hours or less each night had a greater accumulation of belly fat over the next five years, versus
（相比于） those who averaged six or seven hours. Those who slept eight hours or more in bed each night also showed a bigger fat gain - but it was less obvious than that seen in "short sleepers."
The study, reported in the Journal Sleep, does not prove that too little or too much sleep directly leads to excess fat gain. But the findings support and extend those of other studies linking sleep duration - particularly a lack of sleep - to weight gain and even to higher risks of diabetes(糖尿病) and heart disease. Among participants younger than 40, the study found, those who said they slept for five hours or less each night gained more belly fat than those who averaged six or seven hours of sleep. On average, short sleepers showed a 32 percent gain in visceral（内脏的）fat, versus a 13 percent gain among those who slept six or seven hours per night, and a 22 percent increase among men and women who got at least eight hours of sleep each night. A similar pattern was seen with superficial abdominal（腹部）fat.
The findings, according to lead researcher Dr. Kristen G. Hairston, support the belief that sleep habits affect weight and health in general. "Sleep is an important part of your overall health - not just in whether you're tired during the day," she said.
There may be indirect effects; people who get too little sleep may be too tired during the day to exercise, while those who spend a lot of time in bed may spend less time being active, relative to people who sleep fewer hours. Research also suggests that sleep loss alters people's levels of appetite-regulating hormones（荷尔蒙）- which could, in theory, cause them to overeat. Depression, which often affects people's sleep and has been linked to weight gain, could also be a factor, Hairston noted.
【小题1】Who may have the higher risk of being fat over the next five years?
| A．Jack, a Hispanic man, aged 35, sleeps for 3 hours every night. |
| B．Candy, a black woman, aged 41, sleeps for about 5 hours every night. |
| C．Bob, an American, aged 50, sleeps for more than 12 hours every day. |
| D．John, a student in Africa, sleeps for more than 6 hours every week. |
| A．Too little or too much sleep directly gives rise to the fat gain. |
| B．People are subject to heart disease due to the lack of sleep. |
| C．It is admitted that sleep plays an important part in our health. |
| D．Researchers find a longer sleep time is better for our health. |
| A．People should do some exercise in their daily life. |
| B．There is a close link between sleep habits and health. |
| C．More nutrition is greatly needed when we lack sleep. |
| D．More and more people tend to sleep less than before. |
| A．Younger adults getting little or much sleep may become fat. |
B．We are supposed to do exercise as much as possible to ke ep fit. |
| C．We should keep a good sleep habit to improve our health. |
| D．We have to spare no efforts to drive depression away. |
| A．Sleep Habits Linked to Fat Gain in Younger Adults. |
| B．Doing Exercise Is the Best Way to Keep Fit. |
| C．Our Waistlines Can Be Driven Away Right Now. |
| D．Diabetes No Longer bother all of Young People. |
The United States has about 475,000 school buses ---all painted yellow.Each day they carry more than 25,000,000 children, half of all schoolchildren in the country.But these buses, on average, use four liters of diesel (柴油) fuel to travel less than sixteen kilometers.When the school year began last fall, diesel averaged 55 cents a liter nationally.The price nearly doubled, to a dollar and 8 cents, by the end of school in June.
Bob Riley speaks for the American School Bus Council.He says fuel prices for schools are not much lower than others have to pay.As a result, schools are looking for ways to reduce transportation costs.Bus routes are being redrawn or, in some cases, canceled (取消).Some areas are buying buses that use natural gas or other alternative fuels.Other steps include fewer field trips and less travel by sports teams.And some school districts (地区) may end any bus service not required by law.
Studies show that school buses are the safest form of transportation to and from school.The American School Bus Council says cuts in bus service are bad for children and possibly the environment.It says removing buses from the road will mean an increase in other vehicles transporting students.Spokesman Bob Riley says another concern is that reducing bus services might reduce attendance.
But it could also get more children to walk or bicycle to school.And that would surely make people happy at the National Center for Safe Routes to School.More kids walking or biking safely to school is the aim of a three-year-old federal program, part of an international movement.The goal is to increase physical activity and reduce air pollution.The United States will celebrate Walk to School Day on October the eighth this year.But for some students, high fuel prices could make every day a walk-to-school day.
【小题1】What does this passage mainly tell us?
| A．High fuel prices’ influences on school buses. |
| B．New measures to transport school students. |
| C．The safest form of student transportation. |
| D．The origin of Walk to School Day. |
| A．There are too many school buses in the United States. |
| B．There are too many students in the US. |
| C．Diesel prices are going up too rapidly in the US. |
| D．School buses consume too much diesel in the US. |
| A．Cuts in bus service will have negative results. |
| B．The US government is encouraging cuts in bus services. |
| C．The US schools are searching for the safest transportation means. |
| D．Reducing bus service will do a lot of good to the environment. |
A.save more fuels and diesel for the country
B.keep the children safe on their way to school
D.keep the children healthy and the environment clean.