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

发布时间:2024-07-09

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

试卷相关题目

  • 1The 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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  • 2What does the author think of the Americans’ view of their food、

    A.They overstate the government’s interference with the food industry.

    B.They are overoptimistic about the safety of their food.

    C.They overestimate the hazards of their foo

    D.D.They overlook the risks of the food they eat.

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  • 3                                       Passage ThereQuestions 17 to 20 are based on the passage you have just heard.

    A.They will be much bigger.

    B.They will have more seats.

    C.They will have three wheels.

    D.They will need intelligent drivers.

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  • 4                                  Passage TwoQuestions 14 to 16 are based on the passage you have just heard.

    A.They often go for walks at a leisurely pace.

    B.They usually have a specific purpose in mind.

    C.They like the seaside more than the countryside.

    D.C.They like the seaside more than the countrysid

    E.D.They seldom plan their leisure activities in advance.

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  • 5Section BDirections:    In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on the Answer Sheet with a single line through the center.                                     Passage oneQuestions 11 to 14 are based on the passage you have just heard.

    A.The color of the dog.

    B.The price of the dog.

    C.Whether the dog will fit the environment.

    D.Whether the dog will get along with the other pets in the hous

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  • 6The 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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  • 7What 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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  • 8Which 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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  • 9The word “flip” (Line 6, Par

    A.2) most probably means “________”.A.decline

    B.intensify

    C.fluctuate

    D.reverse

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  • 10What 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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