题目
题型：江苏同步题难度：来源：
highest expectations,thanks to the arrival of the "4G" communication on the market!But what exactly
is this all about,and what real benefits do clients stand to gain by switching to such a plan?Below we
hope to clear up precisely these concerns in a bid to bring wireless users closer to the reality that they
have always dreamt of .
The initials "4G" stand for "fourth generation "wireless communication standards,and at present they
are the latest generation of such standards.Unlike in the past,this time the generational leap is going to
take a good long while to repeat itself,so the fourth generation users do not need to fear investing in
something that is simply going to be left by the wayside in a few short months or even weeks.That"s
because this generation of wireless standards is the culmination(顶点) of a much broader and more
coordinated (协调的) set of developments in labs across the world,rather than the kinds of isolated
and shortsighted pushes that resulted in previous generations of wireless standards.
The results of this internationally supported new generation of wireless Internet are much more
significant than most people would imagine,as the steps forward are much greater than the case
between previous generations of wireless systems.Whereas between 2G and 3G wireless systems
the rate of data transfer barely rose a few Kbps (千字节每秒) and was accompanied by few other
major advances.With the arrival of the latest generation the bar (缓冲地址暂存器) has been raised
several Mbps (兆比特每秒) and furthermore several other advantages have been presented.It means
that the fourth generation mobile users will be able to capture signals in a broader variety of locations
and circumstances,not being cut off simply because they have hopped from one network to the next.
Ultimately,the fourth generation mobile Internet means a vast readjustment(再调整) in the way
people live their personal and professional lives,offering them the kind of mobility that they have always
hoped for.And as the fourth generation capabilities are spread over increasing parts of the country,
starting in the nation"s largest cities and spreading out wards from there,it will in the near future be
possible to roam from coast to coast without losing one"s connection for even a second.
1. What is the writer"s purpose of writing this text?
A. To explain the "4G" communication systems.
B. To advertise the "4G" communication systems.
C. To show the great capacities of the "4G" systems.
D. To show his ideas about the "4G" communication.
2. From this text we can infer that ________.
A. more and more people have no interest in the "4G" communication
B. it will be difficult to surpass the "4G" communication systems at present
C. the "4G" communication will surely repeat itself in the future
D. the "4G" communication technology is the most advanced technology at present
3. Which of the following is true about the previous generations of wireless standards?
A. It took a long time to develop the previous generations.
B. The previous generations users think highly of the systems.
C. There were only few isolated and shortsighted changes in them.
D. It is difficult to imagine the future of the wireless standards.
4. What is the most significant advantage of the "4G" systems?
A. Users will be able to catch more signals from all over the world.
B. It will be much cheaper to use the "4G" communication systems.
C. It will be much faster for data to transfer with the help of the "4G" systems.
D. Users will be able to jump from one network to another.
答案
核心考点
试题【阅读理解 It is finally possible for serious mobile communication users to invest】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Pyramid of the Sun, north of Mexico City. They"re putting lots of small, high-tech machines under
the pyramid to try to unlock some of its secrets. For thousands of years, people have tried to uncover
the secrets of the pyramids.
The people who built the pyramids made lots of secret doors and rooms to stop robbers from
finding the treasures inside. However, there always have been some smart thieves in history. Now,
almost all of Egypt"s pyramids have been robbed, including the Great Pyramid of Khufu, which is
the largest pyramid in the world. It is the only one of the ancient wonders of the world that is still
standing.
In AD 820, an Arab king named Abdullah AL Manum got a group of workers to dig their way
into the Great Pyramid and have a look. Inside the pyramid, they found three rooms-the Queen"s
Chamber, the Grand Gallery and the King"s Chamber. But to their surprise, the men didn"t find the
treasures they wanted. The Queen"s and King"s Chambers were both empty! Where were the King"s
mummy and his treasures? Had someone already taken them away? The huge stone doors at the
pyramid"s entrance were still closed when AL Manum"s men went inside. How had the thieves got
in and out?
Since then, many people have gone inside the Great Pyramid to have a look or to try to take things.
But still, no other chambers or walkways have been found.
In 2002, an American team made the most recent visit to the Great Pyramid. Scientists sent a robot
into the pyramid, but they only found a mysterious locked stone door.
B. ancient Egyptian emperors were cruel
C. construction workers led a hard life in ancient Egypt
D. the secrets of the pyramids remain to be uncovered
A. To try to unlock some of its secrets
B. To stop robbers from finding the treasures inside
C. To refuse some visitors all over the world into it
D. To tell the truth to the people in the future
B. It is the only one of the ancient wonders that is still standing.
C. Abdullah AL Manum took the King"s mummy and his treasures away
D. Scientists found a mysterious locked stone door to the Great Pyramid
B. The Great Pyramid of Khufu
C. A Mysterious Locked Stone Door
D. Unlocking the Doors of History
have more than one. Sugar fell from the 19th floor of her owner"s home in Boston last month and was
only hurt a little on her chest.
"This story isn"t much of a surprise," said Jake Socha, a scientist at Virginia Tech University, US, in
an interview with the BBC. "There have been lots of records of these cats surviving."
Back in 1987, scientists studied 132 cats. All of them had been brought to a vet"s clinic in New York
after falling from tall buildings. Around 90 percent of these cats were alive after their fall and only 37
percent had been seriously injured.
"Being able to survive falls is a critical thing for animals that live in trees, and cats are one of them,"
said Socha.
Cats have developed special body structures to survive accidental falls. Their legs are muscular. This
can protect their bones from breaking, Professor Andrew Biewener from Harvard University told the
BBC. Cats can also spread out their legs like a parachute to reduce their falling speed, he said.
The strange part, according to scientists, is that cats have a better chance of survival if they fall from
higher than seven stories. This is because cats have a good sense of which way is down. They can twist
their bodies as they fall to make sure they land on their feet. A higher fall means more time for the cat to
change its body position.
However, you should not throw your cat out of the window to see how this works. Most pet cats are
overweight nowadays. They are not fit enough to change their position in midair, warned Steve Dale, an
American cat behavior scientist.
"This cat (Sugar) was lucky," Dale said. In fact, most cats would suffer serious lung damage, a broken
leg or a broken jaw or teeth damage, he said.
1. What can we learn from Paragraph 3?
A. Cats really do have nine lives.
B. Many cats can survive falls.
C. Cats are the softest animals in the world.
D. More than half of the cats that fall from high places end up badly injured.
2. What does the underlined word "critical" mean in the context?
A. Important.
B. Easy.
C. Challenging.
D. Serious.
3. Why can cats survive falls according to the article?
a. They have a hidden parachute in their bodies.
b. Their legs have developed in a way that protects their bones from breaking.
c. They can land on their feet.
d. They can twist their bodies to reduce the speed at which they are falling.
A. a, b
B. b, c
C. c, d
D. b, d
4. Which of the following statements is TRUE?
A. A pet cat that falls out of a tall building is not really at risk.
B. Sugar was lucky that she was only injured in the leg.
C. Cats are confused as to which way is down w
hen they are in midair.D. A cat that falls from the fourth story of a building is more likely to die than one
that falls from the 10th story.
cross London Bridge?
It sounds far-fetched, but it"s possible - if one of your coats is equipped with a tiny radio-frequency
identification device (RFID), your location could be revealed without you knowing about it.
RFIDs are chips that use radio waves to send data to a reader - which in turn can be connected to the
web.
This technology is just one of the current ways of allowing physical objects to go online - a concept
called the "Internet of thin
gs", which industry insiders have shortened to IoT. This is when not only your PC, tablet and smartphone can connect to the web, but also your car, your
home, your baseball cap and even the sheep and cows on a farm.
Smart buildings and intelligent cars with assigned IP addresses are already making cities smarter - and
soon enough, the entire planet may follow.
"A typical city of the future in a full IoT situation could be a place with smart cameras everywhere,
neurosensors (神经监测系统) scanning your brain for over-activity in every street," says Rob van
Kranenburg, a member of the European Commission"s IoT expert group.
This vision might still be years off, but one by one, "smarter" cities are beginning to crop up around our
landscape.
IoT advocates claim that overall interconnectivity would allow us to locate and monitor everything,
everywhere and at any time.
"Imagine a smart building where a manager can know how many people are inside just by which
rooms are reflecting motion - for instance, via motion-sensitive lights," says Constantine Valhouli from
the Hammersmith Group, a strategy consulting firm.
"This could help save lives in an emergency."
But as more objects go into the digital world, the fine line that separates the benefits of increasingly
smart technology and possible privacy concerns becomes really blurred.
"The IoT challenge is likely to grow both in scale and complexity as seven billion humans are
expected to coexist with 70 billion machines and perhaps 70,000 billion "smart things", with numbers
invading the last fences of personal life," says Gerald Santucci, head of the networked enterprise and
RFID unit at the European Commission.
"In such a new context, the worries increase: to what extent can monitoring of people be accepted?
Which principles should govern the deployment of theIoT?"
1. The first paragraph is used to ________.
A. introduce a new kind of jeans to readers
B. arouse readers" interest in the RFID
C. draw readers" attention to the new jeans
D. set an example of using the RFID
2. The underlined phrase "crop up" in Para. 8 can be replaced by "______".
A. appear
B. cooperate
C. develop
D. change
3. What can we know about IoT?
A. A typical city in a full IoT situation has come into reality.
B. The application of IoT may invade people"s privacy.
C. The technology of IoT has saved lives in an emergency.
D. IoT has been largely used in many cities.
4. If this text continues, what would be discussed next?
A. Solutions of defending people"s privacy.
B. The development of the IoT.
C. The control on monitoring.
D. Smart technology"s disadvantages.
地考察). Such tools for excavation produce rapid results and cause no damage to archaeological sites.
They are highly accurate and usually cost
effective. Here are three of the modern archeologist"s most trusted remote-sensing tools.
As the simplest of the remote-sensing techniques that archeologists use, aerial (空中的) photography
allows experts to see aspects of a site that may be invisible from the ground, such as the way in which
something such as a town, garden, or building is arranged and traces of old walls and roads. The
technique involves taking photographs with conventional cameras and filming from airplanes, helicopters,
hot-air balloons, or other airborne vehicles.
Geographic Information System (GIS) contains a large amount of field data archeologists typically
collect in and around excavation sites. While in the field, archeologists use GIS on their computers to
make and manage detailed site maps, and they can combine the results of remote-sensing tests with maps of the region created with the aid of Global Positioning System. Resulting maps sort the most
archeologically promising areas and display these sites three-dimensionally.
Ranging in size from small handheld models that one places against the ground to larger ones that one
drags across a site, Ground Penetrating Radar (GPR) devices use low-power radio waves to detect
changes underground. Unlike traditional radar, which broadcasts into the air and uses a dish to focus the
returned waves, GPR uses a small but sensitive receiver placed directly against the ground. Depending
on their needs, archeologists can adjust radio frequencies upward for shallow sites or downward for
deeper areas, though GPR devices produce the greatest definition (清晰度) when reading depths of
three feet or less.
1. We can learn from the text that the remote-sensing tools .
A. will replace traditional archeological tools
B. are more difficult to use than traditional tools
C. have been widely and efficiently used in archeology
D. help archaeologists discover more archaeological sites
2. Aerial photography is helpful .
A. in seeing what can"t be seen on the ground
B. in analyzing how old an archaeological site is
C. in reflecting the changes of an archaeological site
D. in taking large-sized photos of an archaeological site
3. Ground Penetrating Radar (GPR) devices are different from traditional radar in that .
A. their sizes are completely different
B. traditional radar uses low-power radio waves
C. the length of waves they send out is different
D. GPR devices can detect changes underground
4. Archeologists can get a detailed site map by .
A. aerial photography
B. Geographic Information System
C. Global Positioning System
D. Ground Penetrating Radar
hours of sleep a night. People were amazed that former British Prime Minister had managed to run the
country on so little sleep. Most people need at least seven or eight hours rest every night.
But now scientists have discovered a gene(基因)that affects the amount of sleep we need and which
allows some people to survive on fewer hours. They found a mother and a daughter who have a rare
gene that allows them to sleep less
than the rest of their family -but still feel alert during the day. The pair managed to stay alert on about six hours sleep a night, two hours less than the rest of their family needs.
The finding, published in Science magazine, offers a new direction for studies on how sleep affects
health. Experts say adults need seven to nine hours of sleep for good health, while teenagers and kids
need more. People who don’t get enough sleep are more likely to get sick and suffer from memory loss.
In 2001,scientists at the University of California discovered a mutation(突变)in a
gene that causes people with that gene to have very unusual sleeping patterns. These people go to bed around 7:30 pm
and wake around 3:30 am.
Now the team has found a gene that affects how long a person can stay asleep. In the family they
studied, the 69-year-old mother and her 44-year-old daughter usually went to bed around 10 pm. The
mother woke up around 4 am, and her daughter woke up around 4:30 am. Both of them felt fully rested.
Blood tests showed the women have a mutation in a gene named DEC2, which regulates the body"s
clock.
Researcher Ying-Hui Fu bred(培育) mice and fruit flies to carry the mutation. The flies and mice with
the mutation slept less than ordinary flies and mice, and needed less time to recover from little sleep.
B. Different people have different sleeping patterns.
C. New measures can reduce the effect of less sleep on health.
D. The hours we need to sleep may be affected by some gene in our body.
B. wide awake
C. quite alive
D. sleepy
B. were asked to sleep less than other family members
C. had the same sleeping pattern as other family members
D. suffered from memory loss for sleeping only six hours a night
B. cure sleeping problems
C. get rid of mice and fruit flies more easily
D. explain why some people need less sleep to feel fully rested
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