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Life has changed in Mexico City．Streets normally filled with people are empty．One of the most popular professional soccer teams recently played a game in an empty stadium that can seat more than100,000 people．It's swine （猪）flu that has made life in Mexico City grind to a halt （慢慢停了下来）．
Seemingly out of nowhere, swine flu has caused confirmed deaths in 12 countries as of April 30．It has sent a wave of alarm around the world．Governments are trying to find ways to prevent further out-breaks．The World Health Organization has raised its swine flu global threat level to five out of six．
People may be familiar with bird flu, but they know little about swine flu．Swine flu is a contagious（传染性） respiratory（呼吸的）disease in pigs．It is caused by a type-A influenza virus．
Humans can also catch swine flu．The virus causes regular outbreaks in pigs, but people usually do not catch it．However, there have been cases of the virus spreading to people, and then from one person to another．
The symptoms of swine flu are similar to the common flu．They include fever, lethargy （无精打采）, lack of appetite, coughing, runny nose, sore throat, nausea（恶心）, and vomiting （呕吐）．The high proportion of young adults among the deaths is one of several mysteries about this virus．Most of the dead had lung damage．What caused it is not yet known．
The virus spreads the same way the common flu does．When an infected person coughs or sneezes around another person, the latter is put at risk．People can get the disease by touching something with the flu virus on it and then touching their mouth, nose or eyes．
There are medicines to treat swine flu．Doctors suggest using anti - viral drugs．They keep the virus from reproducing inside the body．
And there are vaccines for it now, several everyday steps can also help prevent the spread of the virus: washing hands frequently; avoiding close contact with people who are sick; and avoiding touching surfaces that might have the virus on it．
People may worry that they will get swine flu from eating or preparing pork．In fact, you cannot catch the virus from pork products if they have been properly prepared and cooked．Cooking food at temperatures of 71℃ kills the virus．
69．What is the main idea of the passage?
A．It mainly tells us how swine flu broke out in Mexico City．
B．It presents the reader with some information concerning swine flu．
C．It tells us the differences between swine flu and bird flu．
D．It mainly tells readers the dangers caused by swine flu．
70．The following tips can protect us from swine flu EXCEPT _________．
A．keeping us away from other people
B．washing hands frequently
C．avoiding close contact with sick people
D．avoiding touching surfaces that might have the virus on them
71．What's the main idea of the first paragraph?
A．Mexico City is really a place of horror now．
B．People in Mexico City like staying at home．
C．People in Mexico City don't like soccer．
D．Swine flu has seriously affected people's life in Mexico City．
72．What can we infer from the passage?
A．At present there still aren't effective vaccines for swine flu．
B．Swine flu is preventable，controllable and curable．
C．From now on, people can't eat pork if they want to be safe．
D．All of the dead killed by swine flu had lung damage．
查看习题详情和答案>>A single night of taking the drug Ecstasy (摇头丸) can cause serious brain damage and speed up the start of Parkinson’s disease, scientists say. Just two or three Ecstasy tablets can permanently destroy brain cells that affect movement and reasoning, according to American research that links the drug to Parkinson’s for the first time.
A study by a team at Johns Hopkins University in Baltimore, Maryland, involving squirrel monkeys and baboons (狒狒) found that both species suffered permanent damage to key cells, which are lost in Parkinson’s, after receiving three low doses（剂量）of Ecstasy at three-hour periods.
The study is particularly important because baboons are one of the best animal models for the human brain. George Ricaurte, who led the research, said that the widespread abuse of drug might have caused severe damage. “The most troubling result is that young adults using Ecstasy may be increasing their risk of developing Parkinsonism as they get older.”
Alan Leshner, a former director of the US National Institute on Drug Abuse, said, “This study emphasizes the multi-aspect damage that Ecstasy causes to users. We’ve long known that repeated use damages brain cells. But this study shows that even very occasional use can have long-lasting effects on many different brain systems. It sends an important message to young people: don’t experiment with your own brain.”
Janet Betts, a mother whose teenage daughter Leah died after a single Ecstasy tablet in 1995, said, “This comes as no surprise. But people can’t see the effects at first, and they say it won’t happen to them. We’ll see the symptoms later, just as we have with smoking.”
The article is intended to ______.
A. explain the bad effects of drugs on people’s health
B. warn young people of the risk of taking the drug Ecstasy
C. persuade people out of such bad habits as smoking and using drugs
D. tell us the links between the drug Ecstasy and Parkinson’s disease
We know from the passage that a low dose of Ecstasy ______.
A. won’t cause serious brain damage
B. can permanently destroy one’s brain cells
C. will result in immediate symptoms
D. may bring on Parkinson’s at once
Why are squirrel monkeys and baboons involved in the experiments?
A. Because their brain is similar to human being’s.
B. Because these animals usually take drugs.
C. Because these animals will soon get well after the experiment.
D. Because there is a model in the animals’ brains.
The underlined word “This” in the last paragraph probably means that ______.
A. Leah died after a single Ecstasy tablet in 1995
B. taking drug has the same symptoms as smoking
C. occasional use of the drug can have long-lasting effects on the brain systems
D. people have long known that repeated use of the drug damages brain cells
查看习题详情和答案>>It is universally known that friendship is one of the permanent themes in the literature of all languages. Friends are people who willingly and readily help us when we are in trouble, and show 36 for us when we are in misery. This is 37 human beings were born to need the warmth and laughter of friends. Some of us like 38 friends, while others different friends. Personally,I prefer both.
It goes without saying that having similar friends has many 39 , We can feel a renewed sense of 40 when we have a group of old friends who would 41 our sufferings and happiness. 42 , old friends always know how to 43 mutual trust（互信）and how to avoid 44 conflicts. I always feel 45 when I meet an old friend after a long 46 . Immediately, hearty laughter 47 the atmosphere.
Nevertheless I believe that a mixture of friends is 48 advantageous. One can ___49___ various sorts of friends in three aspects. First, frequent 50 with different friends broadens my world 51 ．Just as various kinds of nutriments keep you healthy, making a 52 of friends keeps you lively. Secondly , I have found that the 53 friends cannot only 54 new adventures but alse show me new 55 to success in life. Thirdly, they can help me with whatever difficulties I encounter in life.
To conclude, I prefer to have both types of friends and as many as possible. Of course, I will not forget friends wisely.
36．A．direction B．respect C．sympathy D．anxiety
37．A．because B．why C．how D．What
38．A．true B．right C．same D．similar
39．A．problems B．advantages C．disadvantages D．duties
40．A．tension B．challenge C．strength D．oppression
41．A．share B．convey C．guarantee D．cause
42．A．Therefore B．Otherwise C．However D．Moreover
43．A．lack B．abandon C．bear D．maintain
44．A．obvious B．impossible C．impressive D．hidden
45．A．stressed B．worried C．delighted D．confused
46．A．experience B．departure C．work D．discussion
47．A．fills B．weakens C．ruins D．buries
48．A．eagerly B．equally C．bitterly D．rarely
49．A．make with B．benefit from C．result from D．appeal to
50．A．quarrel B．contact C．argument D．view
51．A．attitude B．position C．outlook D．ambition
52．A．range B．series C．quantity D．variety
53．A．strange B．doubtful C．available D．different
54．A．result from B．stick to C．attend to D．lead to
55．A．avenues B．appeal C．benefit D．attitude
查看习题详情和答案>>A punctual person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.
The unpunctual man, on one hand, never does what he has to do at the proper time. He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be regained. Time is more valuable than material things. In fact, time is life itself. The unpunctual man is for ever wasting and mismanaging his most valuable asset (财产) as well as other’s. The unpunctual person is always complaining that he finds no time to answer letters, or return calls or keep appointments promptly. But the man who really has a great deal to do is very careful of his time and seldom complains of want of it. He knows that he can not get through his huge amount of work unless he faithfully keeps every piece of work when it has to be attended to.
Failure to be punctual in keeping one’s appointments is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time, he keeps all the other guests waiting for him. Usually this will be regarded as a great disrespect to the host and all other guests present.
Unpunctuality, moreover, is very harmful when it comes to do one’s duty, whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time. A man who is known to be habitually unpunctual is never trusted by his friends or fellow men.
What does the author think is the main difference between a punctual person and an unpunctual person?
A. A punctual person does everything ahead of time while an unpunctual person does everything behind schedule.
B. A punctual person does everything at the right time while an unpunctual person seldom does anything at the correct time.
C. A punctual person has a lot of appointments while an unpunctual person has few appointments.
D. A punctual person has much time to do everything while an unpunctual person has little time to do anything.
According to the passage, the main reason that a person is always unpunctual is that _______.
A. he has more work to do than other people
B. he is always in a hurry when he works
C. he doesn’t care much about time
D. he always mismanages and wastes his time
According to the third paragraph, when you are invited to dinner, you should arrive there _______.
A. after other guests have arrived
B. before all other guests
C. at the appointed time
D. after the host has got things ready
Which of the following statements best describes the harm of unpunctuality?
A. If you are an unpunctual person, you cannot be in charge of any important task.
B. If your friends know that you are unpunctual, they may not see you again.
C. Unpunctuality may bring about heavy losses for both public and private affairs.
D. Unpunctuality may make you miss a lot of appointments and lose friends.
查看习题详情和答案>>A punctual person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.
The unpunctual man, on one hand, never does what he has to do at the proper time. He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be regained. Time is more valuable than material things. In fact, time is life itself. The unpunctual man is for ever wasting and mismanaging his most valuable asset (财产) as well as other’s. The unpunctual person is always complaining that he finds no time to answer letters, or return calls or keep appointments promptly. But the man who really has a great deal to do is very careful of his time and seldom complains of want of it. He knows that he can not get through his huge amount of work unless he faithfully keeps every piece of work when it has to be attended to.
Failure to be punctual in keeping one’s appointments is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time, he keeps all the other guests waiting for him. Usually this will be regarded as a great disrespect to the host and all other guests present.
Unpunctuality, moreover, is very harmful when it comes to do one’s duty, whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time. A man who is known to be habitually unpunctual is never trusted by his friends or fellow men.
1. What does the author think is the main difference between a punctual person and an unpunctual person?
A. A punctual person does everything ahead of time while an unpunctual person does everything behind schedule.
B. A punctual person does everything at the right time while an unpunctual person seldom does anything at the correct time.
C. A punctual person has a lot of appointments while an unpunctual person has few appointments.
D. A punctual person has much time to do everything while an unpunctual person has little time to do anything.
2. According to the passage, the main reason that a person is always unpunctual is that _______.
A. he has more work to do than other people
B. he is always in a hurry when he works
C. he doesn’t care much about time
D. he always mismanages and wastes his time
3. According to the third paragraph, when you are invited to dinner, you should arrive there _______.
A. after other guests have arrived
B. before all other guests
C. at the appointed time
D. after the host has got things ready
4. Which of the following statements best describes the harm of unpunctuality?
A. If you are an unpunctual person, you cannot be in charge of any important task.
B. If your friends know that you are unpunctual, they may not see you again.
C. Unpunctuality may bring about heavy losses for both public and private affairs.
D. Unpunctuality may make you miss a lot of appointments and lose friends.
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