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Is the product of a certain pair of integers even?
(1) The sum of the integers is odd.
(2) One of the integers is even and the other is odd.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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答案：
D
這一雙數(shù)
（1）這兩數(shù)的和是奇數(shù)； 那就是奇數(shù)+偶數(shù)的形式 所以積一定是偶數(shù)，充分
（2）一個(gè)數(shù)是奇數(shù)，一個(gè)數(shù)是偶數(shù)，那積一定是偶數(shù)，充分
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