31. Many people, willing to admit that they lack computer skills or other technical skills, are disinclined to recognize that their analytical skills are weak.

32. Some buildings that were destroyed or heavily damaged in the earthquake last year had been constructed in violation of the city&aposs building code.

33. From the earliest days of the tribe, kinship determined the way in which the Ojibwa society organized its labor, provided access to its resources, and dined rights and obligations involved in the distribution and consumption of those resources.

34. A report by the American Academy for the Advance­ment of Science has concluded that many of the currently uncontrolled dioxins to which North Americans are exposed come from the incineration of wastes.

35. In June of 1987, The Bridge of Trinquetaille, Vincent van Gogh&aposs view of an iron bridge over the Rhone, was sold for $20.2 million, the second highest price ever paid for a painting at auction.

36. Bufo marinus toads, fierce predators that will eat frogs, lizards, and even small birds, are native to South America but were introduced into Florida during the 1930&aposs in an attempt to control pests in the state&aposs vast sugarcane fields.

37. While some academicians believe that business ethics should be integrated into every business course, others say that students will take ethics seriously only if it is taught as a separate, required course。

38. Scientists have observed large concentrations of heavy-metal deposits in the upper twenty centimeters of sediments from the Baltic Sea, findings consistent with the growth of industrial activity in the area。

39. For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, protecting warriors against enemy arrows and spears.

40. In metalwork one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bond­ing, is fected continuously over a broad surface rather than at a series of regularly spaced points with no bonding in between.

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