题目
题型：吉林省期中题难度：来源：
with Roger-a llama (美洲驼). But since llamas are used to thinking of animals like coyotes(土狼) and
dogs as threats, it took Roger a few weeks to accept the family dog.
Roger protects the sheep and lambs in two ways. First, he keeps the sheep together. A hungry
coyote will try to scatter(分散) the flock and then pick off a weak or small animal that has become
separated from the rest. But when a coyote threatens the Lorton"s sheep, they all run to Roger,
depending on him to defend them.
And he does, with his second defense: confronting(对抗) the coyote. Llamas are very curious and
will run at top speed to investigate anything that looks interesting. When a coyote sees a
three-hundred-pound llama rushing toward it, the coyote will not usually wait around to see what the
llama wants.
And once a llama realizes that a coyote is threatening the flock, the llama will stand between the
coyote and the sheep to defend them. Often, the llama will charge toward the coyote with its head
down. As it runs, it will sometimes call out an alarm to the flock in a high-pitched voice. Since Roger"s
arrival, coyotes haven"t gotten any sheep from the Lortons.
B. coyotes are sheep"s main enemy
C. llamas are much smarter than coyotes
D. some types of dogs can"t protect sheep
B. curious
C. brave
D. patient
B. farmers using a llama to guard sheep
C. citizens keeping a llama as a pet
D. businessmen selling llamas to farmers
答案
核心考点
试题【阅读理解。 All the Lortons" farm animals - the cows and the goats, the ducks and 】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
actions for two weeks. When he came to analyze(分析) their embarrassing errors , he was
surprised to find tha
t nearly all of them fell into a few groups .One of the women, for instance, on leaving her house for work one morning threw her pet
dog her ear-rings and tried to fix a dog biscuit on her ear. " The explanation for this is that the
brain is like a computer, " explains the professor, " People programme themselves to do certain
activities regularly. It was the woman"s custom every morning to throw her dog two bis
cuits andthen put on her ear-rings. But somehow the action got reversed(颠倒) in the programme ." About
one in twenty of the incidents the volunteers reported were these " programme assembly failures."
Twenty per cent of all errors were " test failures "-primarily due to not verifying the progress of
what the body was doing . A man about to get his car out of the garage passed through the back
yard where his garden jacket and boots were kept , put them on -much to his surprise . A woman
victim reported : " I got into th
e bath with my socks on ."The c
ommonest problem was information " storage failures". People forgot the names of peoplewhose faces they knew, went into a room and forgot why they were there, mislaid something, or
smoked a cigarette without realizing it.
The research so far suggests that while the " central processor" of the brain is liberated from
second-to-second control of a well-practiced routine, it must repeatedly switch back its attention
at important decision points to check that the action goes on as intended. Otherwise the activity
may be " captured " by another frequently and recently used programme, resulting in embarrassing
errors.
search is .B. to classify and explain some errors in human actions
C. to find the causes which lead to computer failures
D. to compare computer functions with brain workings .
B. A man returning home after work left his key in the lock.
C. A lady fell as she was concentrating on each step her feet were taking.
D. An old man, with his shoes on, was trying to put on his socks.
B. changing
C. checking
D. stopping
B. the elimination of one"s total memory
C. the temporary loss of part of one"s memory
D. the separation of one"s action from consciousness
away or fight back. Plants certainly cannot run away, and they lack teeth and claws. But plants can
defend (保护) themselves by using both physical and chemical means.
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant
have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more
spines than leaves on upper branches. This is because the lower leaves are easier for most animals to
reach.
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some
grasses may contain a sandy material; eating such grasses wears down the animal"s teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an
unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the
caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for instance,
has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with
this kind of plant will teach an animal to stay away from it in the future.
B. physical means
C. bitter chemicals
D. sandy materials
B. Its roots send a messenger to discourage the caterpillar.
C. Its roots increase the production of nicotine when it is attacked.
D. Its leaves produce poisonous sand to drive the caterpillar away.
B. How Plants Defend Themselves
C. Attacks and Defenses
D. How Animals Eat Plant Leaves
researching something with so few obvious benefits? Why should resources be spent on space rather
than on conditions and people on Earth? These are questions that, understandably, are very often asked.
Perhaps the best answer lies in our genetic makeup (基因构成) as human beings. What drove our
ancestors to move from the trees into the plains, and on into all possible areas and environments? The
wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring
space is this genetic tendency to expand wherever possible.
Nearly every successful civilization(文明) has explored, because by doing so, any dangers in
surrounding areas can be identified and prepared for. Without knowledge, we may be completely
destroyed by the danger. With knowledge, we can lessen its effects.
Exploration also allows minerals and other potential (潜在的) resources to be found. Even if we have
no immediate need of them, they will perhaps be useful later. Resources may be more than physical
possessions(物质财产). Knowledge or techniques have been gained through exploration. The
techniques may have medical applications which can improve the length or quality of our lives. We have
already benefited from other spin-offs including improvements in earthquake prediction, in satellites for
weather forecasting and in communications systems. Even non-stick pans and mirrored sunglasses are
by-products (副产品) of technological developments in the space industry!.
While many resources are spent on what seems a small return, the exploration of space allows
creative, brave and intelligent members of our species to focus on what may serve to save us. While
space may hold many wonders and explanations of how the universe was formed or how it works, it also
holds dangers. The danger exists, but knowledge can help human being to survive. Without the ability to
reach out across space, the chance to save ourselves might not exist.
While Earth is the only planet known to support life, surely the adaptive(适应的) ability of humans
would allow us to live on other planets. It is true that the lifestyle would be different, but human life and
cultures have adapted in the past and surely could in the future.
B. To compare different ideas.
C. To introduce points for discussion.
D. To describe the conditions on Earth.
B. Humans have the tendency to fight.
C. Humans may find new sources of food.
D. Humans don"t like to stay in the same place.
B. potential resources
C. unexpected benefits
D. physical possessions
B. Resources on the earth.
C. The adaptive ability of humans.
D. By-products in space exploration.
B. Space exploration provided the best value for money.
C. Space exploration can benefit science and technology.
D. The Exploration may help us avoid potential problems on Earth.
different from their sharing partner, and yet all live easier lives because of each other. It is nature"s
idea of sharing.
An example of this is the shark and pilot fish. The pilot fish is a little guy and he would be
helpless if he hung around by himself in the great ocean. But his smartness makes up for his size.
He cleverly swims along beside the shark and when the shark eats, the pilot fish gets the leftovers.
The shark also benefits from this relationship. The pilot fish cleans food scraps (碎屑) and insects
from the shark"s skin.
Another example is the sea anemone (海葵) and striped clown fish. The sea anemone looks
like a flower but contains poisonous cells. When small fish swim into it, the anemone traps and
paralyzes (使麻痹) them. However, the striped clown fish is able to swim into the poisonous
anemone without being harmed. To pay for his safety, the clown fish brings food to the anemone.
He also guides other fish into the anemone"s deadly trap.
Large mammals such as the ox, antelope and African buffalo form such a relationship with the
oxpecker. They provide daily meals to the bird that eats insects. The various large mammals act
as a restaurant with a varied menu for the oxpecker. What do they get in return from the bird?
Free beauty treatments!
Some plants live together in a beneficial relationship. Fungus (菌类) does not have chlorophyll
(叶绿素) that plants need to make food. However, the green alga (海藻) does contain chlorophyll.
It is, therefore, able to feed the fungus along with itself. But nothing is free! The fungus repays it
by protecting the alga. Since it takes in and stores water, it can provide the alga with an unending
water supply.
B. To help the shark to get food.
C. To get food and protection.
D. To find some insects.
B. leads other fish into the anemone
C. harms other fish with poison
D. protects the anemone"s cells
B. They are mostly seen near restaurants.
C. They stay away from large mammals.
D. They feed on small insects.
B. Places where sharing exists.
C. The relationship of living things.
D. Animals that depend on each other.
reader" software, but two blind computer programmers from Australia have solved this problem.
Queensland University of Technology (QUT) graduate James Teh and business partner
Michael Curran developed a free, open-source program, called NVDA, which provides a voice
to read the words on a computer screen as the cursor moves over them. NVDA won the blind
inventors an award in the grand final program of the ABC"s New Inventors, which aired on
September 23. They took home the award for an invention that "might make a real difference
to people"s lives or the environment."
"A sighted person takes for granted that they can sit down at any computer and use it," Mr
Teh said. "We really are in the information age - everything is online these days. So access to
computers for the blind is very important, which is why we wanted our software to be free."
Mr Teh, who majored in software engineering at QUT, said blind students typically didn"t
have the money to purchase "screen reader" technology, at the time in their life when they most
needed it. Now NVDA could be downloaded on to anyone"s personal computer free of charge.
"It can also be copied to a USB stick, which can be used on any PC at school or university,
with no installation required," he said.
Mr Teh and Mr Curran have drawn on their own experience as blind computer users to
develop a product which has some unique features. For example, as the mouse moves up and
down the screen, a sound becomes higher and lower to let you know where the cursor is located.
NVDA has been translated into 27 languages, thanks to volunteer translators. To date, there
have been over 50,000 downloads.
Mr Teh and Mr Curran have been working on the project since 2006. They worked on their
product without any pay for two years. When Mozilla offered some funding in 2008, Mr Teh
was able to quit his day job and work full-time developing NVDA.
B. influences people" s lives
C. is aiming at blind people
D. is easy to use
B. They belonged to a volunteer group.
C. They wanted to help the blind.
D. They wanted people to give up "screen reader" software.
B. They are good at translating.
C. They know how the blind feel.
D. They began to develop NVDA in 2008.
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