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发布时间：2006-06-22 13:26     点击：

    Which of the following is the most logical completion of the passage above?

    (A) incomes will continue to rise

    (B) the proportion of income spent on food has declined more sharply than rises in real income warrant

    (C) technological costs constitute a substantial portion of the cost of food production

    (D) the quantity of food produced by American farmers has increased

    (E) consumers will increase the proportion of their income spent on foot as food prices rise

    Questions 10-15

    Four couples, the Bascos, the Jeffersons, the Pardas, and the Roberts, are learning a new dance. The dancers must perform this dance in pairs. At the beginning of the dance, each of the married couples is such a pair, but there are three calls for partner changes-calls X, Y, and Z-with the following results:

    When call X is made, Mr. Basco and Mr. Parda exchange partners.

    When call Y is made, Mrs. Roberts and Mrs. Jefferson exchange partners.

    When call Z is make, Mr. Jefferson and Mr. Parda exchange partners.

    When more than one call is made, each change of partners is based on the arrangement of partners produced by the preceding call. *

    10. If, since beginning of the dance, there has been one partner change, made in response to call X, which of the following must be a pair of partners?

    (A) Mr. Basco and Mrs. Parda

    (B) Mr. Basco and Mrs. Roberts

    (C) Mr. Jefferson and Mrs. Parda

    (E) Mr. Roberts and Mrs. Jefferson

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