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  Butterflies can seem friendly and harmless.But at least one type has learned to raise its young by tricking ants into feeding it and giving special treatment, British researchers report in this week’s Science.

  The pupae(蛹)of the Rebel’s Large give off a smell that imitates the ants and make themselves at home inside the ant nest.Once they become a caterpillar(幼虫)they even beg for food like young ants, a team including Oxford’s Jeremy Thomas say.But, not satisfied just to be fed, the butterflies even manage to demand special treatment.It turns out that queen ants make sounds that signal their special position to worker ants.The caterpillars have learned to imitate those sounds, gaining position high enough to be rescued before others if the nest is attacked.

  The original idea came to Jeremy some 15 years ago when he was recording the sounds of worker ants.He realized that sometimes worker ants treated the caterpillars of the Rebel’s Large Blue like queen ants when the caterpillars make chemical and behavioral signals just like those of the advanced enough to prove whether or not the idea was correct.

  In an experiment, the team recorded and then played back the sounds made by queen ants to worker ants in a nest.Jeremy said, “When we played the queen sounds, they would stand still with their antennae(触角)held out and their jaws apart for hours-the moment anyone goes near they will attack.” In short, the right sound signals cause worker ants to protect and care for a caterpillar pretending to be their queen.

  Such a discovery is especially important because the Rebel’s Large Blue is an endangered species.

(1)

The best title for the passage could be _________.

[  ]

A.

A new butterfly species discovered

B.

Ants tricked in raising butterflies

C.

How butterflies raise their young

D.

How ants communicate with each other

(2)

From the passage we can learn that the research _________.

[  ]

A.

proved Jeremy’s idea was correct

B.

was carried out by a Cambridge learner

C.

has been done for more than 20 years

D.

needs more experiments to prove the discovery

(3)

Worker ants will protect the butterfly’s caterpillar when it _________.

[  ]

A.

stands still with its mouth open

B.

begs some of the worker ants

C.

gives signals like the queen ant

D.

behaves just like a worker ant

(4)

According to the passage, butterflies trick worker ants mainly through _________.

[  ]

A.

sounds and movements

B.

smells and touches

C.

chemicals and movements

D.

sounds and smells

(5)

What is the major importance of the discovery?

[  ]

A.

It may help protect a type of butterfly.

B.

It will be used in communication technology.

C.

It finds out how ants care for their queens.

D.

It provides a new way to keep ants away.

答案:1.B;2.A;3.C;4.D;5.A;
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[  ]

A.

stay

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leave

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go out

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die

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earth

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moon

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star

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A.

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at midnight

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[  ]

A.

gift

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for more

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each other

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cleans

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appreciate

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阅读理解。
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Category                 1998    1999                                                                                             (percent)  (percent)   
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Baggage …………………………………………  18.3%    21.8%   
Customer service ………………………………   13.1%    11.3%   
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[     ]
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[     ]
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[     ]
A. I only   
B. II only   
C. I and II only   
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