题目
题型：同步题难度：来源：
resources of the sea were unlimited. For example, a noted biologist writing in the mid-19th century
commented that none of the great sea fisheries(渔业) are to be exhausted. Today though, there is
evidence that the resources land and the air, and that the endangered species (种类) include Herring
and Carp as well as the African Elephant, Indian Tiger, and the American Eagle.
Further, the threats to fish are more alarming in some ways than the threats to animals and birds.
This is because fish are a much needed food resource and people throughout the world depend on
fish as an important part of their dish, and the decline (下降) in the fish supply could have extensive
effects on hunger and population.
Fishermen in the North Atlantic alone annually harvest 20 billion pounds of fish to satisfy food
demands, but it is important to recognize that these practices cannot continue without depleting (耗尽)
fish storage within the next few years. Sea resources are rapidly declining in many parts of the world,
and the problem cannot he ignored (忽视) .
We can predict that food supplies in the sea can not last forever.
the sea?
B. Depleted.
C. Limited.
D. Unlimited.
B. The whole world.
C. Asia and America.
D. America.
B. None of the great sea fisheries are to be exhausted.
C. Fish supply has no effects on people.
D. Sea resources are important to people.
B. Threats to Animals and Birds
C. Sea Resources on the Decline
D. Protection of Fish
答案
核心考点
试题【 During the 19th century, it was common to hear people in Europe and America】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
there for about a year, and then will be replaced with another group of pioneers. Building
the base on Mars will advance our knowledge of the solar system and aid in our
understanding of the earth.
We already know that Mars resembles the earth in many aspects : general size,
presence of water, lengthof day, range of temperatures. These resemblances have
caused many people to consider a centuries-long project: to transform Mars.
Transforming means alterinB a planet"s surface so that the Earth"s life forms can
survive there. This concept, previously found only in science fiction is now being
seriously considered by scientists.
Transforming Mars is theoretically simple : add nitrogen (氮气)and oxygen to the
atmosphere; pump water to the surface; and add the earth"s plants and animals in the
order in which they developed on the Earth. But it will take at least 300 years.
Some people think that such a project is too huge for humans to undertake, but
there are very good reasons to make the attempt. The earth now contains some 6
billion people and no one has any idea of how many humans the earth can support.
Our very existence and numbers are threatening many other species. We also have
had some experience with transforming our own planet : altering thelandscape ,
theatmosphereand the climate. Currently transforming earth has become a wiser activity
as we try to control global warming, air and water pollution, and" preserve some natural
living places.
While the possibility of such a project is small, it is not impossible. Even if earthbound
societies come and go in the next 300 years, the project can continue through the work
of the Mars settlers without the need for constant backing from the earth.
The future existence of all the people in our world may very well depend upon our ability
to transform Mars.
B. Changing.
C. Planting.
D. Building.
B. find out its similarity to the Earth
C. avoid the dying way of many other species
D. find on Mars living place for the increasing human beings
B. transforming Mars is theoretically simple
C. our existence and numbers are threatening many other species
D. the development of science and technology is very rapid
B. Negative.
C. Sceptical(怀疑的 ) .
D. Objective.
Most scientists agreed that cloning an entire human being-besides morally
questionable-was filled with technical problems. After all, research into animal cloning
has already shown that there are hundreds of failures, includingmanybadlydeformed
(畸形的)creatures that were usually miscarried.
Now comes word that it might be easier to clone humans than was previously
believed. People have a genetic quirk(怪癖) that might prevent some of the
developmental deformities associated with animal cloning. One gene, called IGF2R,
is normally imprinted in sheep, cows and mice but not in humans. Human clones would
always inherit non-imprinted IGF2R genes, so there would be no chance of a mix-up
and, their growth would be normal. But what of the other 49 0r so imprinted genes
(遗传基因 ) ?No one knows what troublethey might cause. So the fact humans have
one less imprinted gene than mice, sheep or cows means that human
cloningmightbemarginally (轻微地 ,很少地 ) easier , but not necessarily safer.
B. it faces no moral problems now
C. it might be easier but still not safer
D. it is proved by practice that it is easier, only not so safe
B. A genetic quirk.
C. A non-imprinted IGF2R.
D. Not clearly found.
B. 50.
C. 49.
D. 48.
B. it should be properly controlled
C. it should be stopped
D. it should be forbidden by law
within just three centuries, according to some scientists.
These scientists found that rising temperatures in some places mean humans would
be unable to adapt or survive. "" It would begin to occur with global - mean warming
of about 7℃, calling the habitability of some regions into question," the researchers
wrote in a paper.
With 11-12℃ warming, such regions would spread to include the majority of the
human population as currently distributed. Professor Steven said there was no chance
of the earth heating up by 7℃ this century, but there was a serious risk that the
continued burning of gas and coal could create the problem by 2300. ""There"s
something like a 50/50 chance of that over the long term," he said.
The study, which examined climate change over a longer period than most other
research, looked at the "heat stress" produced by combining the influence of rising
temperatures and increased humidity (湿度).
Professor Steven said climate change research had been "short-sighted" not to
realize the long-term consequences of the influence of greenhouse gases blamed for
global warming. "It needs to be paid attention to," he said. "There"s not much we can
do about climate change over the next two decades but there"s still a lot we can do
about the longer term changes." "Near 2300, we may be faced with temperature
increases of 12 degrees or even more," Professor Tony Michael said." If this happens,
our current worries about sea level rise, occasional heat waves and bushfires,
biodiversity (生物品种) loss and agricultural difficulties will appear in front of us -- as
much as half the currently inhabited globe may simply become too hot for people to
live there. "
B. Burning of fuel adds to the earth"s heating.
C. We may be faced with temperature increases of 12 degrees.
D. Climate change would not stop until 2100.
B. doesn"t think we can do anything to avoid global warming
C. believes we can do much to prevent the longer term changes
D. wishes to examine climate change over a longer period
B. large parts of the earth may be too hot for humans to live on by 2300
C. greenhouse gases are to blame for global warming
D. human beings will die out three centuries later
(导向设备) built for the active business traveler.
The three C"s of value for Internet-connected GPS:
●Confidence: Get to meetings on-time and stress-free with real-time traffic alerts.
Find what you need from Internet- connected search.
●Convenience :Plan your trips online before you head out of the door. Access the
latest maps automatically.
●Current: Get new features as we continuously innovate (创新). Save money on
gas with fuel prices that are updated regularly.
Many features are specially designed to help the active business traveler.
●While driving, TeleNav Shotgun checks for traffic updates along your route every
five minutes. If there"s trouble ahead, TeleNav Shotgun will let you know with a friendly
voice and a visual sign. With one tap, you can choose to change course, taking into
account the latest traffic conditions in the area.
● In your world, it"s often one busy day after another. The last thing you need is the
trouble of writing down addresses so you can put them into your navigation system later.
When life is very busy, TeleNav Shotgun helps keep you organized. With our online
pre-planning feature, you can easily forward addresses to your TeleNav Shotgun from
the convenience of your home or office computer.
●We have built one of the largest up-to-date databases of business listings available
online and on a personal navigation device. Look up more than 11 million points of
interest.
Some features that we are currently working on:
●Address Share -- Share addresses or your location to meet up with friends more
efficiently.
●Weather -- Get up -to -date, detailed weather information.
●Commute (通勤) Alerts -- Get emailed alerts about traffic conditions on your
daily commute.
Price of TeleNav Connected Service
TeleNav Connected Service Plan Price
Month - to - Month payment $12
1-Year Plan $129
2-Year Plan$239
"If I was to get a stand alone, it would be the Shotgun." -- JG Mason, Gadgetell
"I"m connected with TeleNav Shotgun and my whole world is easier to navigate."
-- Dory Delvin
B. help reserve tickets and rooms in a hotel
C. offer the route with the least traffic delays
D. show the scenery of the place
B. Making your busy days easier to manage.
C. Finding what you need with ease.
D. Helping improve your work performance.
B. It saves money for the users.
C. It can access the latest maps automatically.
D. It has real -time traffic alerts.
you can save ______.
B. $49
C. $129
D. $239
(海啸). Along with four Haitian colleagues, Dr Hermann Fritz, a professor, travelled
around the coast of Haiti. He wanted to find out what had happened before the
evidence disappeared forever. He had heard reports and saw evidence that a wave
up to 3-meter high had hit some areas of the coast south of the capital following the
quake near Port au Prince. It had killed at least three people and engulfed (吞没)
buildings.
Dr Fritz presented some of his findings at the Ocean Sciences meeting in Portland
in the US. "This was a relatively small event," he told BBC News." Most of the deaths
were due to the earthquake, but at least three victims we know survived the earthquake
and were hit by the wave."
These three victims were a father and his two young sons. They were standing
close to the shore in Petit Paradis, watching the wave instead of heading for higher
ground. Draw-back in the water level is a sign that a big wave is coming. "It clearly
showed a lack of tsunami education," Dr Fritz said. "It was pure luck that the wrong
information did not kill more people in this case."
Despite the great damage it caused, the Haiti earthquake was not of the type
or magnitude (级) usually associated with tsunamis. It had a magnitude of 7.0.
"Generally anything over 7.5 is cause for concern," explained Eddie Bernard, a
tsunami researcher." But anything between 7 and 7.5 can cause smaller, local tsunamis."
It also occurred on land and, to cause a tsunami, it must happen under the sea.
"Anything that moves water generates a wave," said Dr Bernard. "And the deeper
the event, the bigger the wave." Dr Fritz explained that the main causes of the Haitian
tsunami were "local landslides". ""But there are fault lines in this region that are in areas
which are more likely to cause a tsunami and, if you have a much bigger landslide, you
could have a much bigger wave," he said.
B. check the damage to the coasts
C. gather evidence about the wave
D. study the power of the wave
B. they cared little about the direction of the big wave
C. they didn"t see the signs of big waves
D. they didn"t know it was time to run for higher ground
B. it was lucky that the loss wasn"t greater
C. earthquakes of the magnitude of 7.0 are common in Haiti
D. few Haitians know about tsunamis and earthquakes
B. Business.
C. Sports.
D. Entertainment.
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