Microwaves may be great at warming up food, but what about warming people?
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 kilowatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50 mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.
1. Which of the following can tell the main idea of the passage?
A. A new heating system.
B. A new microwave oven.
C. A popular technique.
D. The magnetron.
2. According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?
A. It directly heats people in a room.
B. It heats walls and furniture in a room.
C. It is safe.
D. It saves energy．
3. The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ________________.
A. 20 mw. / sq. cm. B. 40 mw. / sq. cm.
C. 60 mw. / sq. cm. D. 85 mw. / sq. cm.
4. According to Paragraph 4, which of the following fills the room with low-power microwaves?
A. The magnetron.
B. The motion detector.
C. The microwave oven.
D. The radiation-absorbing chemical.
5. Which of the following statements about microwave heaters would Buffler most probably agree with?
A. Microwave heaters will soon be widely used by homeowners.
B. Microwave heaters sometimes make people feel uncomfortable.
C. Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter.
D. Microwave heaters cannot be accepted by the public because they are somewhat unsafe.
名校课堂系列答案科目：高中英语 来源：2013-2014学年高考二轮复习训练：专题5 交际用语英语试卷（解析版） 题型：阅读理解
One of the world’s richest men has taken a close interest in one of man’s most basic functions：visiting the toilet.Bill Gates’s charitable organization，the Bill and Melinda Gates Foundation，is looking for inventors to design the loo of the future，which，they hope，would improve sanitation for millions of people around the world.
So，what’s wrong with the traditional flush toilet？Firstly，it wastes a huge amount of potential drinking water.Secondly，they are more likely to cause pollution.This is a real problem in many areas of the developing world，where，according to United Nations estimates，unsafe sanitation causes half of all hospitalizations.Younger people are particularly at risk.Illnesses which cause diarrhea are responsible for the deaths of about 1.5 million children a year.Finally，standard lavatories simply aren’t practical in remote areas.
The challenge set by Bill Gates was to come up with a latrine which works without running water，electricity or aseptic tank.It also needed to operate for less than 5 cents.28 designs were displayed at the recent Reinvent the Toilet Fair，in Seattle，USA.Among them was one which turned human waste into electricity using microwaves，another which converted human waste into charcoal，and yet another which used urine for flushing.
But the winner was a solar?powered design which generated hydrogen gas and electricity. The team from the California Institute of Technology(CIT) picked up a prize of $100,000.
But clearly Bill Gates doesn’t feel he’s flushing money down the toilet.After the Seattle event he said，“We couldn’t be happier with the response we’ve gotten.” Gates has even pledged $370 million more to the future toilet project.They hope to field test more prototypes over the next three years.
1.Why is Bill Gates paying people to invent new toilets?
A．Because he wants to test people’s sense of creativity.
B．Because he wants to improve sanitation for many people.
C．Because he thinks the traditional ones are out of fashion.
D．Because he can’t design this kind of things himself.
2.Which of the following is NOT a problem with the traditional flush toilet?
A．They waste too much water.
B．They might cause diseases.
C．They are not always practical.
D．They are too complicated to use.
3.The underlined word “latrine” in the third paragraph might have similar meanings to the word “________” in the text.
A．loo? B．sanitation
C．diarrhea? D．prototype
4.The team from CIT won the prize because their design ________.
A．can change human waste into electricity
B．can turn human waste into charcoal
C．can produce power with solar energy
D．can use urine for flushing
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科目：高中英语 来源：江苏省20092010学年高二下学期期末考试试卷（英语） 题型：其他题
第二卷（非选择题部分，共35分）
第四部分：写作(共二节，满分35分)
第一节：任务型阅读(共10小题；每小题1分，满分10分)
请认真阅读下面短文，并根据所读内容在文章后表格的空格处里填人最恰当的单词。注意：每个空格填1个单词。
When Percy Spencer invented the microwave, it changed the world greatly. People would no longer have to wait endless hours while cooking their food in an old-fashioned oven. Instead, using the microwave has allowed them to cook food in just seconds.
According to the medical website mercola.com, just about “ninety percent of Americans have microwaves in their homes”. However, is this convenient invention as perfect as it seems?
There are many reports of microwaves changing the original qualities of the food, which can cause cancer as well as changes in the body.
“Electro-magnetic (电磁的) radiation harms food, and changes substances cooked in it to dangerous products,” Dr. Lita Lee – chemist, nutritionist, author and lecturer – wrote in her book, Health Effects of Microwave Radiation – Microwave Ovens (1991).
However, the microwave is not only for food; microwaves are used in medicine as well. For example, it warms heating pads and used to warm blood used in transfusions (输血).
Norma Levitt, a hip surgery patient in an Oklahoma hospital (1991), died after blood being heated for her transfusion was altered in the microwave. A lawsuit followed and because of this incident, blood is no longer heated in the microwave.
Regardless of what has happened, big companies still claim that microwaves are great machines that have caused trouble to “few people” and have had “few consequences”. However, people should decide if saving a few minutes is more important than preventing cancerous cells from entering the body.
Dr. Jonathan Wright, Medical Director of Tahoma Clinic in Renton, Washington, considers the microwave unhealthy and recommends some alternatives.
“Try eating a lot of your food, like vegetables, uncooked. Ideally, at least one-third of the food in your diet should be uncooked, since this is the form that will give you the maximum amount of nutrients. If you do want to cook some food or heat up leftovers, use your stove (火炉),” he said.
These alternative cooking styles may take a little time from your day, but can help you lead a healthier and more stable lifestyle. These methods will allow you to get the most nutrients from your food, as well.
Health is not valued till sickness comes. In today’s fast-paced modern world, we should have more consideration towards peoples’ health.
|
Title |
Microwave: not necessarily safe |
|
Brief (71)________ |
(72)________ of the microwave: Percy Spencer Advantage of the microwave: saving (73)________ Percentage of Americans having microwaves: about 90% |
|
Disadvantages of the microwave |
Fact: Electro-magnetic radiation is (74)_______ to food and can change substances to dangerous products. Result: The microwave can (75)_______ the qualities of food, which may cause cancer. |
|
Fact: The blood was (76)_______ in the microwave before being transfused. Results: A blood transfusion caused the (77)_______ of a patient. A lawsuit was brought and the microwave has never been (78)________ in medicine ever since. |
|
|
Dr. Wright’s opinion |
To avoid harm from the microwave, people should eat more food without being (79)_______ and use stoves instead of the microwave if necessary. |
|
Author’s attitude |
We should (80)_______ more about health than convenience. |
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科目：高中英语 来源：2010-2011学年浙江省高三上学期第一次月考英语卷 题型：阅读理解
B
HOTEL INFORMATION
Baymont Inn Ft.Lauderdale
3800 W．Commercial, Ft. Lauderdale．FL 33309
Lowest Prices 110% Guaranteed (保证)
Room Information
Rooms are equipped with Double, Queen , or King bed (s) , smoking or non-smoking based on location and availability. Provided in each spacious guest room is a hair dryer, coffee maker, iron, ironing board, 25’TV and guest voice mail．
Check-in Time：7:00 P. M.
Hotel Amenities：Air Conditioned, Free Parking, 24 Hour Front Desk, Pool, Television with Cable, Coffee Maker in Room, Hairdryers Available．
Beach Plaza Hotel
625 N．Fort Lauderdale Beach Blvd, Ft．Lauderdale, FL 33304
Room Information
The oceanfront accommodations at Beach Plaza Hotel are some of the most affordable on Fort Lauderdale Beach．Each room features direct-dial telephone, cable television and daily maid service．The very affordable efficiency studios even include full kitchens! All rooms surround the private poolside garden courtyard．
Check-in Time：7:05 P. M.
Hotel Amenities：Air Conditioned, Coffee Maker in Room, 24 Hour Front Desk, Parking, Hairdryers Available, Pool, Television with Cable．
Fort Lauderdale Plaza Hotel
3711 N．Ocean Blvd, Ft．Lauderdale, FL 33308
Room Information
Guest rooms feature TVs, in-room movies, Internet access, in-room safes, alarm clock radios, hairdryers, refrigerators, microwaves, and balconies．
Check-in Time：7:00 A.M.
Hotel Amenities：Parking，Heated Pool, Television with Cable, and Coffee Maker in Room．
1.Which hotel gives a promise?
A. Baymont Inn Ft . Lauderdale． B. Beach Plaza Hotel．
C. Baymont Inn Hotel． D. Fort Lauderdale Plaza Hotel．
2.In which hotel parking is the cheapest?
A. Baymont Inn Ft . Lauderdale． B. Beach Plaza Hotel．
C. Baymont Inn Hotel． D. Fort Lauderdale Plaza Hotel．
3.If you ______ , you will probably go to Beach Plaza Hotel．
A. enjoy seeing films without leaving your hotel room
B. are fond of swimming in heated water
C. want to eat food cooked by yourself in the hotel
D. are a cigarette smoker
4.Which of the following is NOT true to the ads?
A. All of the three hotels provide television with cable．
B. You can keep your money in the room safe in Fort Lauderdale Plaza Hotel．
C. In Beach Plaza Hotel a 24-hour maid is available．
D. While staying in Fort Lauderdale Plaza Hotel, you can surf the Internet．
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科目：高中英语 来源：2010-2011学年河南省高三上学期第一次月考英语卷 题型：阅读理解
“Mobile phone killed my man,” screamed one headline last year. Also came claims that an unpublished study had found that mobile phones could cause memory loss. And a British newspaper devoted its front page to a picture supposedly showing how mobile phones could heat the brain.
For anyone who uses a mobile phone, these are worrying times. But speak to the scientists whose work is the focus of these scares and you hear a different story.
One of the oddest effects comes from the now famous “memory loss” study. Alan Preece and his colleagues at the University of Bristol placed a device that imitated the microwave radiation of mobile phones to the left ear of volunteers. The volunteers were good at recalling words and pictures they had been shown on a computer screen. Preece says he still can’t comment on the effects of using a mobile phone for years on end. But he rules out the suggestion that mobile phones have an immediate effect on our cognitive（认识的）abilities. “I’m pretty sure there is no effect on short-term memory,” he says.
Another expert, Tattersall, remarked that his latest findings have removed fears about memory loss. One result, for instance, suggests that nerve cell synapses（神经元突触） exposed to microwaves become more — rather than less — receptive to undergoing changes linked to memory formation.
An even happier outcome would be that microwaves turned out to be good for you. It sounds crazy, but a couple of years ago a team led by William Adey at the Veterans Affairs Medical Center in California found that mice exposed to microwaves for two hours a day were less likely to develop brain tumours when given a cancer-causing chemical.
“If it doesn’t certainly cause cancer in animals and cells, then it probably isn’t going to cause cancer in humans,” says William. And while there’s still no absolute evidence that mobile phone use does damage your memories or give you cancer, the conclusion is: don’t be afraid.
1. Mobile phone users are worried because ______.
A. they are not sure whether mobile phones can cause memory loss
B. it’s said that mobile phones have a lot of side effects
C. one headline reported “Mobile phone killed my man”
D. a British newspaper showed mobile phones could heat the brain
2. According to this passage, we can know that _____.
A. the mobile phone is a most wonderful invention
B. there’s no need to worry about the radiation from mobile phones
C. something must be done to stop people using mobile phones
D. mobile phone companies shouldn’t cheat customers
3. What would be the best title for this passage? ______.
A. New Mobile Phones. B. Special Mobile Phones.
C. New Special Investigation: Mobile Phones. D. New Investigation.
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科目：高中英语 来源：20102011年度河北省高三第二学期第一次调研英语卷 题型：阅读理解
Microwaves may be great at warming up food, but what about warming people?
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Buffler of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. /sq.cm.); a satisfactory feeling of warmth occurs between 35 and 50 mw./sq.cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw./sq.cm. And a frozen meat pie in your microwave oven receives about 1000 mw./sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwaves oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole body microwave heaters in houses, Buffler says microwaves may attract livestock farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.
1. Which of the following can tell the main idea of the passage?
A. A new heating system. B. A new microwave oven.
C. A popular technique. D. The magnetron.
2. The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ____.
A. 20 mw. / sq. cm. B. 40 mw. / sq. cm.
C. 60 mw. / sq. cm. D. 85 mw. / sq. cm.
3. According to paragraph 4, which of the following fills the room with low-power microwaves?
A. The magnetron. B. The motion detector.
C. The microwave oven. D. The radiation-absorbing chemical.
4. Which of the following statements about microwave heaters would Buffler most probably agree with?
A. Microwave heaters will soon be widely used by homeowners.
B. Microwave heaters sometimes make people feel uncomfortable.
C. Microwave heaters will be probably first used by livestock farmers to protect their lambs in winter.
D. Microwave heaters cannot be accepted by the public because they are somewhat unsafe.
查看答案和解析>>
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