修改时间：2024-07-13 浏览次数：260 类型：期中考试
Throughout history scientists have risked their health and their lives in their search for the truth.
Sir Isaac Newton, the seventeenth century scientist, was very smart, but that didn't stop him from doing some pretty stupid things. In his laboratory in Cambridge he often did the strangest experiments. Once, while testing how light passes through lenses (晶状体), he put a long needle into his eye, pushed it to the back, and then moved it around just to see what would happen. Luckily, nothing long-lasting did. On another occasion he stared at the sun for as long as he could bear, to discover what effect this would have on his sight. Again he escaped suffering permanent damage, though he had to spend some days in a darkened room before his eyes recovered.
In the 1750s the Swedish chemist Karl Scheele was the first person to find a way to produce phosphorus (磷). He in fact discovered eight more chemical elements including chlorine (氯), though he didn't get any praise for them. He was a very clever scientist, but his one failing was a curious habit of tasting a little of every substance he worked with. This risky practice finally caught up with him, and in 1786 he was found dead in his laboratory surrounded by a large number of dangerous chemicals, any of which might have been responsible for his death.
Eugene Shoemaker was a respected geologist. He spent a large part of his life studying craters (火山口) on the moon, and how they were formed, and later did research into the comets of the planet Jupiter. In 1997 he and his wife were in the Australian desert where they went every year to search for places where comets might have hit the earth. While driving in the Tanami desert, normally one of the emptiest places in the world, another vehicle crashed into them and Shoemaker was killed on the spot. Some of his ashes (骨灰) were sent to the moon aboard the Lunar Prospector spacecraft and left there — he is the only person who has had this honor.
More primary care doctors in a community (社区)appear to lead to improved life expectancy for people living there, though a lack of such physicians across U.S. could be a cause of concern for overall population health in years to come.
For the study, researchers looked at physician counts per 100,000 people in a range covering 2005 to 2015 in the U. S., along with life expectancy and specific causes of death. They found that an increase of 10 primary care physicians per 100,000 population was associated with a 51. 5-day increase in life expectancy, while an increase of 10 specialty physicians per 100, 000 population increased life expectancy by 19. 2 days. An increase in primary care physicians also was associated with reductions of many deaths including heart diseases and cancers.
Along with those findings, though, the study said many communities did not have primary care physicians in 2015, with the decline in supply more prominent in rural areas than their urban areas. Many believe that a well-functioning health care system requires a solid foundation of primary care, however, payment difference between primary care and technical specialties continue to dispirit the U. S. primary care physician workforce.
"Higher pay and lifestyle preferences lead most students to choose non-primary care fields, even when their hearts say primary care," the study said. "We must turn this trend around with practical changes in physician payment policy; no amount of superb primary care training or creative practice reform will prevent further declines in primary care physician, which will lead to worsening health for the United States."
The study's researchers conclude that future research should focus on the "quality and cover of primary care, types of primary care physician training and service offerings, and effective access rather than just supply".
Technology offers conveniences such as opening the garage door from your car or changing the television station without touching the TV.
Now one American company is offering its employees a new convenience: a microchip implanted (植入) in their hands. Employees who have these chips can do all kinds of things just by waving their hands. Three Square Market is offering to implant microchips in all of their employees for free. Each chip costs $300 and Three Square Market will pay for the chip. Employees can volunteer to have the chips implanted in their hands. About 50 out of 80 employees have chosen to do so. The president of the company, his wife and their children are also getting chips implanted in their hands.
The chip is about the size of a grain of rice. Implanting the chip only takes about a second and is said to hurt only very briefly. The chips go under the skin between the thumb and forefinger. With a chip in the hand, a person can enter the office building, buy food, sign into computers and more, simply by waving that hand near a scanner. The chips will be also used to identify employees. Employees who want convenience, but do not want to have a microchip implanted under their skin, can wear a wristband (腕带) or a ring with a chip instead. They can perform the same tasks with a wave of their hands as if they had an implanted chip.
Three Square Market is the first company in the United States to offer to implant chips in its employees. Epicenter, a company in Sweden, has been implanting chips in its employees for a while.
Three Square Market says the chip cannot track the employees. The company says scanners can read the chips only when they are within a few inches of them. "The chips protect against identity theft, similar to credit cards." The U.S. Food and Drug Administration approved the chips back in 2004, so they should be safe for humans, according to the company.
In the future, people with the chips may be able to do more with them, even outside the office. Todd Westby is Chief Executive Officer of Three Square Market. He says, "Eventually, this technology will become standardized allowing you to use this as your passport, public transit, all purchasing opportunities, etc."
Ever walked to the shops only to find, once there, you've completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we've accepted that a forgetful brain is as much a part of aging as wrinkles and gray hair. But now a new book suggests that we've got it all wrong.
According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age. In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s — much later than previously thought.
Furthermore, rather than losing many brain cells as we age, we keep them, and even produce new ones well into middle age. For years it's been assumed that brain, much like the body, declines with age. But the longest, largest study into what happens to people as they age suggests otherwise.
This continuing research has followed 6,000 people since 1956, testing them every seven years. It has found that on average, participants performed better on cognitive (认知的) tests in their 40s and 50s than they had done in their 20s. Specifically, older people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving. Where they performed less well was number ability and perceptual speed — how fast you can push a button when ordered. However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond. In short, researchers are now coming up with scientific proof that we do get wiser with age.
Neuroscientists are also finding that we are happier with aging. A recent US study found older people were much better at controlling and balancing their emotions. It is thought that when we're younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we've learned our lessons and are aware that we have less time left in life: therefore, it becomes more important for us to be happy.
How to Remember What You Read
Reading is important. But the next step is making sure that you remember what you've read! you may have just read the text. But the ideas, concepts and images（形象）may fly right out of your head. Here are a few tricks for remembering what you read.
If the plot, characters, or word usage is confusing for you, you likely won't be able to remember what you read. It's a bit like reading a foreign language. If you don't understand what you're reading, how would you remember it? But there are a few things you can do... Use a dictionary; look up the difficult words.
Are you connected?
Does a character remind you of a friend? Does the setting make you want to visit the place? Does the book inspire you and make you want to read more? With some books, you may feel a connection right away. How willing are you to make the connections happen?
Read it; hear it; be it!
Read the lines. Then, speak them out loud. And, put some character into the words. When he was writing his novels, Charles Dickens would act out the parts of the characters. He'd make faces in the mirror and change his voice for each character.
How often do you read?
If you read frequently, you'll likely have an easier time with remembering what you're reading and what you've read. As you make reading a regular part of your life, you'll make more connections, stay more focused and understand the text better. You'll learn to enjoy literature- as you remember what you read!
A. Are you confused?
B. Practice makes perfect.
C. What's your motivation?
D. Memory is sometimes a tricky thing.
E. Marking helps you remember what you read.
F. But other books require a bit more work on your part.
G. You can do the same thing when you are reading the text!
We talk about the persistence (坚持不懈) needed to make our dream come true today. Just think of Wilbur and Orville Wright. Their1 certainly didn't happen overnight!
Wilbur was 12 years old and Orville 8 when their father brought home a 2. It was a rubber3 made in France. They 4it so much that they played with it until it broke. Immediately, they began 5 copies. They were hooked on aviation (飞行器制造)! In 1900, as young men, having built their first glider (滑翔机), they decided to 6 it out at Kitty Hawk on Kill Devil Hills. It 7 consistent strong winds, and the somewhat cushioning effects of sand. That first flight was unsuccessful, 8 it didn't stop them. After several more tries, on December 17, 1903, with a much 9 plane, they risked their lives to drive it in the wind. They 10 flying the world's first powered airplane. Beginning at 10:35 a.m. that day, Orville 11 it 120 feet in about 12 seconds! At 12:00, Wilbur flew it 852 feet in 59 seconds! Johnny Moore, one of the five men who12them that morning (in charge of dragging the plane across the sand for positioning), ran to the village of Kitty Hawk 13, "They've made it!" This was the 14 of aviation! At this time, Wilbur was 36 and Orville 32. Roughly 24 years had passed 15 their father gave them that toy!
If you have a 16, work at it. If it doesn't turn out as17, don't give up! Try again! Who wants to live and say somewhere, "If only" or "What if?" 18 what you want and accomplish it. Don't ever give up!19 in the world can take the place of persistence. Talent will not; nothing is more 20 than unsuccessful men with talent. Education will not; the world is full of educated derelicts (流浪汉). Persistence and determination alone are omnipotent (无所不能的).
Your next car could have two seats, three wheels — two in front and one in the back and a top speed of more than 100 miles per hour. Elio Motors plans to make such a tiny car (name) the Elio. Its two seats sit front and back instead of side side. The driver is positioned in the center with the passenger directly behind.
The starting price for the car (be) just $6,800. It has only one door, on the left side, cuts a few hundred dollars off the manufacturing costs. Having three wheels also makes it (cheap). It has air conditioning, power windows and door locks and AM/FM radio. More features can be ordered through Elio's long list of suppliers. Elio will also sell the cars directly through its own stores and not through franchised dealers (特约经销商).
Paul Elio dreamed as a kid that one day he (own) a car company called Elio Motors. In 2008, (tire) of high gas prices, he started working on a car that burns gas in a more effective way. Equally important to him was creating U.S. manufacturing jobs and making the car inexpensive enough (attract) buyers who might otherwise be stuck in their old, unreliable cars. "Whatever matters to you, this can make a (different) to it," he said.
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：在错的词下画一横线，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。
Mr. and Mrs. Zhang all work in our school. They live far from the school, and it takes them about a hour and a half to go to work every day. In their spare time, they are interesting in planting vegetables in their garden, that is on the rooftop of their house. They often get up earlier and water the vegetables together. They have also bought for some gardening tools. Beside, they often get some useful informations from the Internet. When summer came, they will invite their students pick the fresh vegetables!
试题篮
