Coal miners once used the canary bird to detect

试卷相关题目

• 1The arroyo toad is disappearing because

  A.it has been threatened by frogs.

  B.it is losing its habitat.

  C.a disease has been killing its eggs.

  D.it can't bear the cold of winter.

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• 2Amphibians lay their eggs

  A.in any stream they can find,

  B.in places without UV light,

  C.only on san

  D.D.only in the right conditions

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• 3Losing amphibians means losing

  A.knowledge about fatal human diseases.

  B.knowledge about air and water pollution.

  C.a chance to discover new medicines.

  D.an opportunity to detect poisonous gases.

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• 4When did British gentlemen begin to wear ties regularly、

  A.After the late 19th century.

  B.In the 1630s.

  C.In 1660.

  D.In the late 18th century.

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• 5Who brought the Frenchmen's neckwear to Britain、

  A.Tony Blair.

  B.Charles ll.

  C.Jim Callaghan.

  D.Andrew Turnbull.

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• 6Scientists think that the decline of amphibians could

  A.cause environmental change.

  B.cause a decline in other kinds of animals.

  C.be a warning signal for human beings.

  D.be a good sign for human beings.

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• 7Belle would be fed some fruit juice if she

  A.grasped the joystick.

  B.moved the joystick to the side of the light.

  C.sat quietly in a special chair.

  D.watched lights on a display panel.

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• 8The wires fixed under Belle's cap were connected to

  A.a plastic box next door.

  B.a computer at Cambridge University,

  C.a box of electronics in the booth.

  D.a box which, in turn, was linked to two computers

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• 9Which of the following is NOT true of the robot built by Srinivasan、

  A.It was directed by signals converted from the electrical activity in Belle's brain

  B.It converted the electrical patterns into instructions for the other robot.

  C.It was six hundred miles away from where Belle was.

  D.It could perform the same function as Belle did.

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• 10Which of the following statements indicates the success of the experiment、

  A.Belle responded to the robots successfully.

  B.Belle and the robots danced beautifully.

  C.Belle and the robots responded to the lights at the same time.

  D.The two robots moved the joysticks successively.

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