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发布时间：2006-06-22 13:29     点击：

    2. The sheer diversity of tropical plants represents a seemingly----source of raw materials, of which only a few have been utilized.

    (A) exploited  (B) quantifiable

    (C) controversial  (D) inexhaustible

    (E) remarkable

    3. For centuries animals have been used as---- for people in experiments to assess the effects of therapeutic and other agents that might later be used in humans.

    (A) benefactors  (B) companions

    (C) examples   (D) precedents  (E) surrogates

    4. Social tensions among adult factions can be

  ----by politics, but adolescents and children

    have no such----for resolving their conflict with the exclusive world of adults.

    (A) intensified.. attitude

    (B) complicated.. relief

    (C) frustrated.. justification

    (D) adjusted.. mechanism

    (E) revealed.. opportunity

    5. The state is a network of exchanged benefits and beliefs, ----between rulers and citizens based on those laws and  procedures that are----to the maintenance of community.

    (A) a compromise.. inimical

    (B) an interdependence.. subsidiary

    (C) a counterpoint.. incidental

    (D) an equivalence.. prerequisite

    (E) a reciprocity.. conducive

    6. Far from viewing Jefferson as a skeptical but enlightened intellectual, historians of the 1960's portrayed him as----thinker, eager to fill the young with his political orthodoxy while censoring ideas he did not like.

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