Given the present growth rate of the world′s population and our ability to produce food,

试卷相关题目

• 1How could William Nylander best be described、

  A.degenerate

  B.domineering

  C.ingenious

  D.anxious

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• 2According to accepted nineteenthcentury theories,which two elements form the composition of lichens、

  A.iodine and chemical reagents

  B.algae and fungi

  C.hypochlorite and iodine

  D.chemical reagents and atmospheric chemicals

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• 3All of the following are true about Nylander except

  A.he was the first to use chemical reagents in the taxonomy of lichens.

  B.he believed that lichens were simple plants.

  C.he was an esteemed lichenologist.

  D.he taught botany at the University of Paris.

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• 4Which of the following is not true、

  A.Nylander accepted his colleagues′ theories on the composition of lichens.

  B.Eighty percent of lichens bear Nylander′s name.

  C.Today lichens are used to detect atmospheric pollution.

  D.Most botanists consider lichens to be a compound species.

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• 5Internationally renowned scientists sent lichen samples to Nylander because

  A.he considered them to be simple plants.

  B.he used reagents to determine their use.

  C.he analyzed and classified them.

  D.he collected and preserved them.

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• 6The term“Green Revolution”refers to

  A.the political situation in Greenland

  B.the increased use of scientific methods in agriculture.

  C.the upheavals in the underdeveloped nations.

  D.the crop shortages experienced in 1972.

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• 7Each year,the world′s food reserves reduce by

  A.10 million tons.

  B.20 million tons.

  C.30 million tons.

  D.40 million tons.

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• 8It is expected that crop yields will drop,especially in underdeveloped countries,mainly because of

  A.disastrous weather.

  B.weak strains.

  C.finance shortages.

  D.revolutions.

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• 9Which of the following is true、

  A.Green Revolution did not end until 1972.

  B.The shortage of chemical fertilizers was caused by the short supply of petroleum.

  C.Every ton of petroleumbased fertilizers can help increase ten tons of crop yields.

  D.By the year of 2025,one million children will die of hunger each month in the world.

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• 10The aim of controlled scientific experiments is _____

  A.to explain why things happen.

  B.to explain how things happen.

  C.to describe selfevident principles.

  D.to support Aristotelian scienc

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