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题库 / Prep2007E1-DS-178
If there are more than two numbers in a certain list, is each of the numbers in the list equal to 0 ?
(1) The product of any two numbers in the list is equal to 0.
(2) The sum of any two numbers in the list is equal to 0.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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1) 如果这个一个数字不等于0，其它数字都等于零。那么1）也成立，所以1）不sufficient.
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