The word “flip” (Line 6, Par

试卷相关题目

• 1Which of the following titles is most appropriate to the passage、

  A.Polarity Reversal: A Fantastic Phenomenon of Nature.

  B.Measurement of the Earth’s Magnetic-Field Intensity.

  C.Formation of the Two Poles of the Earth.

  D.A New Approach to the Study or Geophysics.

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• 2What is the message the author wants to convey in the passage、

  A.Eating and drinking have become more hazardous than before.

  B.Immediate measures must be taken to improve food production and processing.

  C.Health food is not a dream in modern society.

  D.There is reason for caution but no cause for alarm with regard to food consumption.

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• 3The reduction of the possible hazards in food ultimately depends on ________.

  A.the government

  B.the consumer

  C.the processor

  D.the grower

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• 4By saying “they employ chemical warfare” (Line 4, Par

  A.2), Bruce Ames means “________”.A.plants produce certain chemicals to combat pests and diseases

  B.plants absorb useful chemicals to promote their growth

  C.farmers use man-made chemicals to dissolve the natural chemicals in plants

  D.farmers use chemicals to protect plants against pests and diseases

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• 5The author considers it impossible to obtain no-risk food because ________.

  A.no food is free from pollution in the environment

  B.pesticides are widely used in agriculture

  C.many vegetables contain dangerous natural chemicals

  D.almost all foods have additives

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• 6What have the two French geophysicists discovered in their research、

  A.Some regularity in the changes of the earth’s magnetic field.

  B.Some causes of the fluctuation of the earth’s magnetic field.

  C.The origin of the earth’s magnetic fiel

  D.D.The frequency of polarity reversals.

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• 7The French geophysicists’ study is different from currently prevailing theories in ________.

  A.its identification of the origin of the earth’s magnetic field

  B.the way the earth’s magnetic intensity is measured

  C.its explanation of the shift in the earth’s polarity

  D.the way the earth’s fluctuation rhythm is defined

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• 8In Peter Oslo’s opinion the French experiment ________.

  A.is likely to direct further research in the inner physics of the earth

  B.has successfully solved the mystery of polarity reversals

  C.is certain to help predict external disasters

  D.has caused great confusion among the world’s geophysicists

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• 9The reason why people might not be able to stay alive in a world without emotion is that ________.

  A.they would not be able to tell the texture of objects

  B.they would not know what was beneficial and what was harmful to them

  C.they would not be happy with a life without love

  D.they would do things that hurt each other’s feelings

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• 10According to the passage, people’s learning activities are possible because they ________.

  A.believe that emotions are fundamental for them to stay alive

  B.benefit from providing help and support to one another

  C.enjoy being rewarded for doing the right thing

  D.know what is vital to the progress of society

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