Which of the following statements is true of public lands in the U. S. 、

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• 1What is the main idea of this passage、

  A.Public lands are one of the main sources of revenues.

  B.Public lands play an important role in energy production.

  C.Public lands should be developed to ease energy shortage.

  D.Public lands store huge energy resources for further development.

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• 2To protect our ecosystems we should not use more than_______

  A.our share of resources

  B.a biological creature

  C.a given area

  D.the maintenance of the ecosystem

  E.the source of food

  F.various species

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• 3Plants, animals and humans are all effective in_______

  A.our share of resources

  B.a biological creature

  C.a given area

  D.the maintenance of the ecosystem

  E.the source of food

  F.various species

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• 4Plants are essential in an ecosystem because to other living creatures they are_______

  A.our share of resources

  B.a biological creature

  C.a given area

  D.the maintenance of the ecosystem

  E.the source of food

  F.various species

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• 5In an ecosystem, plants, animals and humans live together in_______

  A.our share of resources

  B.a biological creature

  C.a given area

  D.the maintenance of the ecosystem

  E.the source of food

  F.various species

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• 6Geothermal resources, wind turbines, and hydropower facilities in Paragraph 4 cited as examples to illustrate that_______.

  A.the amount of alternative energy production from public lands is huge

  B.alternative energy production is no less than conventional energy production

  C.they are the most typical conventional energy resources from public lands

  D.geothermal resources are more important than the other two

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• 7There is a mounting pressure on public lands to satisfy US energy demands_______.

  A.the U. S. is demanding more and more energy

  B.many Americans are unhappy with energy development in foreign countries

  C.quite a few public lands are banned for energy development

  D.many Americans think public lands are being abused

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• 8Public lands can be used for energy development when_______.

  A.energy development restrictions are effective

  B.federal land managers grant permissions

  C.they go through the land use planning process

  D.there is enough federal budget

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• 9"Poorer children" and "hungry people" are mentioned in Paragraph 2 to show_______.

  A.humans' senses are influenced by what's going on in their heads

  B.they have sharper senses than others

  C.they lose their senses because of poverty and hunger

  D.humans' senses are affected by what they see with their eyes

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• 10There was a delay in Radel's experiment because

  A.he needed more students to join

  B.he didn't prepare enough food for the 42 students

  C.he wanted two groups of participants, hungry and non-hungry

  D.he didn't want to have the experiment at noon

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