Six chimps were introduced to a slot machine called the Chimp- O- Mat, which would give out one grape when a white coin was insert into the slot. When Dr Wolf showed a young chimp named Moos how he co 题目和参考答案——青夏教育精英家教网—

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Six chimps(猩猩) were introduced to a slot machine called the Chimp- O- Mat, which would give out one grape when a white coin was insert into the slot. When Dr Wolf showed a young chimp named Moos how he could win himself a grape by inserting a coin, Moos immediately picked up another coin, pushed it into the slot, then stuck out his paw and waited for a grape to drop out..

Besides white coins, the chimps were given yellow coins to insert into the slot, but nothing came out because they were worthless. The chimps soon learned this fact. When a handful of white and yellow coins were thrown into the cage housing, Bula, Bimba and Alpha, the three chimps rushed for the white coins and never touched the yellow ones.

Now the chimps were madly in love with money. Would the six chimps value money enough to work for it? To find the answer, Dr Wolfe designed a work machine. The chimps were shown that when a large handle was lifted, they could pick one grape. When they had learned the skill of lifting the handle to get the grape, Dr Wolf made a change to the machines so that instead of the grape they would find a white coin. This coin would still buy them one grape at the Chimp- O- Mat.

Thus the complexity of getting a grape was not only doubled, but also the money to buy the grape could be achieved only by honest work. The handle they had to lift to get the coin weighed eighty pounds. Great effort is needed for a young chimp to raise that weight, yet the formerly lazy chimps not only quickly mastered the new operation, but also showed great eagerness to work for money.

46．The purpose of the Chimp- O- Mat experiment was to discover whether chimps would learn to________.

A. enjoy themselves B. work together C. use coins D. operate a machine

47．In the first part of the experiment the chimps learned to __________.

A. tell the difference between the useful and the worthless coins

B. use yellow coins to get grapes

C. wait for the grapes to drop out

D. buy grapes with coins

48．Which of the following shows the correct order of the things a chimp did in the second part of the experiment?

a. got a white coin

b. got a grape

c. lifted the heavy handle

d. inserted a coin into the Chimp- O- Mat

A. c a b d B. c a d b C. a b d c D. a d c b

49．The passage showed that _________.

A. Dr Wolfe was disappointed with his experiment

B. The chimps could do everything if taught

C. The chimps were willing to work if something was paid back

D. The chimp’s understanding was as good as a man’s

CABC

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Elephants are famous for their supposedly excellent memory. Now it seems that they are good at simple math too.

Researchers at the University of Tokyo have found an Asian elephant named Ashya can add small quantities together and correctly identify(识别）which is larger.

For example ,when researcher Naoko dropped three apples into one bucket and one apple into a second, then four more apples into the first and five into the second, Ashya correctly identified that the first bucket contained more apples and began munching(嚼）on her tasty prize.

Ashya chose the correct bucket 74% of the time "I even get confused when "I'm dropping the apple," Naoko told New Scientist magazine.

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Naoko presented her findings last week at the International Society annual meeting in New York.

It is not obvious why elephants should need this mathematical ability in the wild." It is really tough to figure out why elephants would need to count," said Mya, a professor at Cornell University who studies elephants.

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C. they hope to stay in groups

D. they have taken regular training