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7.(C) Every adult male woolly monkey is larger than even the largest female woolly monkey. In colonies of woolly monkeys, any adult male will dominate any female.
If the statements above are true, which one of the following must on the basis of them be true of woolly monkeys in colonies?
(A) Size is the primary determinant of relations of dominance among woolly monkeys.
(B) Some large adolescent male woolly monkeys dominate some smaller females of the species.
(C) If a male woolly monkey is larger than a female of the species, that male will dominate that female.
(D) If a female woolly monkey dominates a male of the species, the dominated male monkey is not an adult.（D）
(E) An adult male woolly monkey can dominate a female of the species only if that female is also an adult.
这题的思路:
adult male larger than even the largest female==è any adult male will dominate any female
逆否命题应该是if an adult male will not dominate any female ===èadult male is not larger than even the largest female.吧
怎么这样子也是逆否命题啊? ) If a female woolly monkey dominates a male of the species==èthe dominated male monkey is not an adult | 
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发表于 2004-12-10 06:19:00
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