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| 文章出处：学生大考试站 发布时间：2005-10-12 |
owers：freesias, irises, lilies, peonies, tulips,
and zinnias．All acceptable arrangements conform to the
following conditions：
If an arrangement contains any freesias, it cannot
contain any zinnias．
If an arrangement contains any tulips, it cannot
contain any zinnias．
If an arrangement contains any peonies, it must also
contain at least one zinnia, and there must be
exactly as many zinnias as peonies．
If an arrangement contains any irises, it must also contain
tulips, and there must be twice as many tulips as irises.
If an arrangement contains freesias, the number of
freesias must be greater than the total number of
other flowers used．
3. Which of the following flower arrangements could be
made acceptable simply by adding a tulip？
(A)Three freesias, one lily, two tulips
(B)Four freesias, two peonies, one tulip
(C)Five freesias, one iris, one tulip
(D)Two irises, two tulips, two zinnias
(E)Two lilies, two peonies, two tulips
4.Which of the following, if added to an unacceptable
flower arrangement consisting of four tulips and two
freesias, would make the arrangement acceptable？
(A)Four freesias
(B)Four irises
(C)Two lilies
(D)Two peonies
(E)Two zinnias
5.Each of the following is a pair of varieties of flowers
that can be used together in an acceptable flower
arrangement EXCEPT
(A)freesias and irises
(B)freesias and tulips
(C)irises and lilies
(D)irises and peonies
(E)lilies and zinnias
6.Which of the following unacceptable flower arrange-
ments could be made acceptable simply by removing
some or all of the flowers of one variety？
(A)Four freesias, one iris, one lily, one peony
(B)Four freesias, one iris, two tulips, one zinnia
(C)Four freesias, two irises, two tulips, one zinnia
(D)Three freesias, one lily, one peony, two zinnias
(E)Three freesias, two peonies, one tulip, two zinnias
7.If an unacceptable flower arrangement consisting of
four freesias, one lily, one peony, and two tulips is to
be made acceptable by adding or removing only one
flower, which of the following must be done？
(A)Add one freesia
(B)Add one iris
(C)Add one zinnia
(D)Remove the peony
(E)Remove one tulip
8.Scientist：More than 1, 000 large asteroids regularly
cross the Earth’s path．Even though the probabil-
ity of one colliding with the Earth is extremely
slight, we shoul
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