How could William Nylander best be described、

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• 1According 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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• 2All 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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• 3Which 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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• 4Internationally 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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• 5The dog saw his _____ in the pool of water.

  A.reflect

  B.reflection

  C.bone

  D.imagination

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• 6Given the present growth rate of the world′s population and our ability to produce food,

  A.the United States will be able to feed half the world by 2025.

  B.the future will see no more hunger.

  C.the developed nations will change their eating habits.

  D.we will encounter very serious problems in the near futur

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• 7The 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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• 8Each 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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• 9It 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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• 10Which 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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