If you still have any doubt, give your credit-card information over the telephone.
Keep your password safe: Most on-line sites require a user name and password before placing an order.Treat your password with care.
45.What do most people worry about the Internet according to this passage?
A.fraud on the Internet B.computer hackers C.illegal web site D.shopping on line
46.How many pieces of advice does the passage give to you?
A.1 B.2 C.3 D.4
47.You are shopping on the web and you want to buy a TV set, what does this article suggest doing?
A.You can go to the website http://www.shopping.com and buy it without doubt.
B.Send your credit-card information as soon as the web asks you to do so.
C.Give your credit-card information over the telephone if you have doubt.
D.Don’t pay money until your TV set is sent to you.
48.Which of the following is TRUE according to the passage?
A.Computer hackers sold the retailer’s information to a web site to get money.
B.A reliable website offers you an advanced secure system.
C.You can depend on the password to protect your information.
D.The on-line credit-card thieves stole your credit card and paid with it.
C
From the moment that an animal is born it has to make decisions .It has to decide which of the things around it are for eating , and which are to be avoided ; when to attack and when to run away .The animal is , in fact , playing a very dangerous game with its environment , a game in which it must make a decision—a matter of life or death .
Animals’ ability to act reasonably is believed to come partly from what we may call “genetic (遗传性的)learning” , which is different from the individual (个体的) learning that an animal does in the course of its own lifetime .Genetic learning is learning by a species —animals of the same kind—as a whole , and it is achieved by selection of those members of each generation that happen to act in the right way .However, the role of genetic learning depends upon how similar the future environment is to the past.The more important individual experience is likely to be , the less important is genetic learning as a means of getting over the problems of the survival game.Because most animals live in ever changing environments from one generation to the next , it is not surprising to find that very few species indeed depend wholly upon genetic learning.
In the great majority of animals, their particular ways of acting in a new environment are a compound(复合体)of individual experience added to the action patterns animals are born with.That is why animals can survive.
49.The animal’s life will come to an end___________.
A.if the animal makes a wrong decision B.if the animal plays a dangerous game
C.when the animal attacks its enemy D.when the animal runs too slowly
50.Very few species depend entirely on genetic learning because____________.
A.each generation has its own way of learning B.their environments change all the time
C.they can act reasonably on their own D.it takes their whole life to learn
51.When the environment doesn’t change much , ______________.
A.animals cannot act in a right way
B.genetic learning is less important for animals
C.individual learning plays a less important role
D.animals cannot get over problems on their on their own
52.Animals’ living on generation after generation depends on__________.
A.their natural action pattern with their own experience
B.the lessons they have learnt during their lifetime
C.their experience in particular environments
D.the knowledge passed on by their parents
D
By the time the Montgomery Improvement Association chose the 26-year-old Martin Luther King, Jr as its leader, the hours-old bus boycott by the black citizens of Montgomery, Alabama, was already a great success.King would later write that his unexpected call to leadership "happened so quickly that I did not have time to think it through." "It is likely that if I had, I would have turned down the nomination(提名)."
Although press reports at the time paid much attention to his public speaking skills, King was actually an unwilling leader of a movement started by others.His later writings and private letters show that he doubted the movement at that time.In the early days of his taking part, King was troubled by telephone threats, disagreement within the black community and Montgomery's "get tough" policy.One night, as he considered ways to "move out of the picture without appearing a coward(懦夫)," he began to pray aloud and, at that moment, "experienced the presence of the God as I had never experienced him before."
He would later admit that when the boycott began, he didn't firmly believe in Gandhian(甘地)principles.Although he had been introduced to those in college, he had remained doubtful."I thought the only way we could solve our problem of segregation(种族隔离 )was an armed revolution," he recalled.
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