题目
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people every year-almost all of whom are under five, very poor, and African. In most years, more than
five hundred million cases of illness result from the disease, although exact numbers are difficult to assess
because many people don"t (or can"t) seek care. It is not unusual for a family earning less than two hundred
dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer
works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace
can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often,
headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red
blood cells they infect (感染). They can also attach themselves to blood vessels in the brain. If it doesn"t kill
you, malaria can happen again and again for years. The disease passed on to humans by female mosquitoes
infected with one of four species of parasite. Together, the mosquito and the parasite are the most deadly
couple in the history of the earth-and one of the most successful. Malaria has five thousand genes, and its
ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies
show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with
large populations. Some of the disease"s spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical
which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have
become resistant to it. Successful alternatives that help prevent resistance are already available, but they have
been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.
B. it is unusual to seek care
C. they can remain unaffected for long
D. there are too many people suffering from the disease
B. have ability to defend parasites
C. have their red blood cells infected
D. have sudden fever, followed by chills
B. Its ability to pass on the virus frequently.
C. Its outbreaks in cities with large populations.
D. Its ability to defend itself and resist new drugs.
B. the alternative treatment is not easily available to most people
C. malaria has developed its ability to resist parasites
D. nobody knows what will be the drug to treat the disease
B. How many people are killed by malaria each year?
C. Why are there so many people suffering from malaria?
D. What has been done to keep people unaffected for long?
答案
核心考点
试题【阅读理解。 Malaria, the world"s most widespread parasitic (寄生虫引起的) disease, kills】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
paying attention to the revolution that is taking place in bio-technology (生物技术). With the help of new
medicine, the human body will last a very long time. Death will come mainly from accidents, murder and
war. Today"s leading killers, such as heart disease, cancer, and aging itself, will become distant memories.
In discussion of technological changes, the Internet gets most of the attention these days. But the change
in medicine can be the real technological event of our times. How long can humans live, Human brains wer
e known to decide the final death. Cells (细胞) are the basic units of all living things, and until recently,
scientists were sure that the life of cells could not go much beyond 120 years because the basic materials
of cells, such as those of brain cells, would not last forever. But the upper limits will be broken by new
medicine. Sometime between 2050 and 2100, medicine will have advanced to the point at which every 10
years or so, people will be able to take medicine repair their organs (器官). The medicine, made up of the
basic building materials of life, will build new brain cells, heart cells, and so on-in much the same way our
bodies make new skin cells to take the place of old ones.
It is exciting to imagine that the advance in technology may be changing the most basic condition of
human existence, but many technical problems still must be cleared up on the way to this wonderful future.
B. accidents sad war
C. accidents and aging
D. heart disease and war
B. the Internet
C. brain cells
D. human organs
B. human brains can decide the final death
C. the basic materials of cells will last forever
D. human organs can be repaired by new medicine
B. humans have to take medicine to build new skin cells now
C. much needs to be done before humans can have a longer life
D. we have already solved the technical problems in building new cells
of chocolate you know that these are things you can eat. You can also use other senses when you choose
your food. You may like it because it smells good or because it tastes good. You may dislike some types of
food because they do not look, smell or taste very nice. Different animals use different senses to find and
choose their food. A few animals depend on only one of their senses, while most animals use more than one
sense.
Although there are many different types of food, some animals spend their lives eating only one type. The
giant panda (大熊猫) eats only one particular type of bamboo (竹子). Other animals eat only one type of food
even when given the choice. A kind of white butterfly (蝴蝶) will stay on the leaves of a cabbage, even though
there are plenty of other vegetables in the garden. However, most animals have a more varied diet (多样化饮
食). The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will
be different depending on the season.
Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In
countries such as France and Britain, people eat foods with too much sugar. This makes them overweight,
which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad
for the health. Choosing the right food, therefore, has become an area of study in modern life.
B. are not satisfied with their food
C. choose food in similar ways
D. eat entirely different food
B. The small bird.
C. The bear.
D. The fox.
B. the food color changes
C. they move to different places
D. they are attracted by different smells
B. French and British food is good
C. some people have few choices of food
D. some people care little about healthy diet
for only three to five minutes. More often the doctors can"t fix the damage. Sometimes they are afraid to
try something to help because it is dangerous to work on the brain. The doctors might make the person
worse if he operates on the brain.
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors
should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This
gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on
them. He made the monkeys" blood back to the monkeys" brains. When the brain"s temperature was 10℃,
Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the
blood again. After their operations the monkeys were like they had been before. They were healthy and
busy. Each one could still do the jobs the doctor had taught them.
B. the patients are often too nervous
C. the damage is extremely hard to fix
D. the blood-cooling machine might break down
B. trying the operation on monkeys first
C. having the blood go through a machine
D. lowering the brain"s temperature
B. can keep the brain"s blood warm
C. can keep the patient"s brain healthy
D. can help monkeys do different jobs
a. send the cooled back to the brain
b. stop the blood to the brain
c. have the blood cooled down
d. operate on the brain
B. c, a, b, d
C. c, b, d, a
D. b, c, d, a
allowed and dog owners must walk their dogs.
This comes after a national law was passed to give prison sentences to people who desert cats or
dogs.
"The civilization of a city can be measured by this," said Monica Carina, the councilor (议员) behind
the new law.
"It"s good to do whatever we can for our animals who in exchange for a little love fill our existence
with their attention," she told a Rome newspaper.
The newspaper reported that round bowls don"t give enough oxygen for fish and may make them go
blind.
"Rome has tried to protect fish more than anywhere else in the world. It stands out for recognizing
that fish are interesting animals who deserve(值得) over respect and compassion every bit as much as
dogs and cats and other animals," said Karin Robertson, a director of the People for the Ethical Treatment
of Animals.
Last year a law was passed in Italy that gives people who desert pets big fines (罚款) and prison
sentences. Since then local governments have added their own animal protection rules.
The northern city of Turin passed a law in April to give pet owners fines of up to ＄598 if they do not
walk their dogs three times a day.
The new law in Rome also says that owners mustn"t leave their dogs in hot cars or cut their dogs" tails
to make them look lovelies. The law also gives legal recognition to the"cat ladies" who feed homeless cats.
The cats live all over the city from ancient ruins to modern office car parks.
B. guarantee better conditions for goldfish
C. stop people from catching goldfish
D. discourage keeping goldfish at home
B. protection for ancient ruins
C. awareness of animal protection
D. recognition of animal lovers
B. praise
C. support
D. popularity
B. feed homeless animals in car parks
C. raise their cats near ancient ruins
D. shut their dogs home all day long
food poisoning. Food poisoning is usually not serious, but some types are deadly, The symptoms of food
poisoning usually begin within hours of eating the poisoned food. Fever is one of the most common symptoms.
Certain microorganisms (微生物) cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs, meat, vegetables, and many other foods. After entering the body, these tiny living things
release (释放) poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,
processed, or prepaid. For example, many farmers spray chemicals on crops to kill weeds and insects. Some
people may have a bad reaction to those chemicals when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of
seafood, grains, nuts, seeds, beans, and mushrooms.
When people handle food properly, the risk of food poisoning is very small Microorganisms multiply rapidly
in dirty places and in warm temperatures. This means that people should never touch food with ditty hands or
put food on unwashed surfaces. Food should be kept in a refrigerator to stop microorganisms from gnawing.
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food
covered with chemicals before eating it. Finally, people should not eat raid mushrooms or other foods that grow
in the wild. Some of these foods may contain natural materials that are poisonous to humans. In addition, some
types of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people eat
natural poisons, they must go to the hospital right away to have their stomachs emptied.
B. Food poisoning means death.
C. Food poisoning comes in varieties.
D. Food poisoning can be serious.
B. are too common to be noted
C. can be noticed within hours
D. can be ignored
B. low temperatures
C. some tiny living things
D. certain natural materials
B. vegetables are safer than meat and seafood
C. natural poisons are more dangerous than chemicals
D. different types of food should be handled differently
B. chemicals are needed in food processing
C. food poisoning can be kept under control
D. food poisoning is out of control
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