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发布时间：2006-06-22 13:29     点击：

    A main-order company sells packages of jam, each containing three jars of jam. The available flavors are: grape, orange, strawberry, peach, and quince.

    Each jar contains exactly one flavor of jam. Each package must conform to the following rules:

    Each package must contain either two or three different flavors of jam.

    A package containing any orange jam must also contain at least one jar of grape.

    A package containing any grape jam must also contain at least one jar of orange.

    Peach jam and quince jam cannot be packed in the same package.

    A package containing any strawberry jam must also contain at least one jar of quince, but a package containing quince jam need not contain strawberry jam.

    1. Which of the following is an acceptable package?

    (A) One jar of peach, one jar of strawberry, and one jar of orange

    (B) One jar of orange, one jar of strawberry, and one jar of grape

    (C) Two jars of strawberry and one jar of quince

    (D) Three jars of peach

    (E) Three jars of orange

    2. An acceptable package CANNOT contain which of the following combinations of jams?

    (A) Grape and peach  (B) Peach and quince

    (C) Orange and peach  (D) Orange and grape

    (E) Strawberry and quince

    3. Which of the following could be packed with a jar of strawberry to make an acceptable package?

    (A) One jar of peach and one jar of orange

    (B) One jar of grape and one jar of orange

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