If w + x < 0, is w - y > 0 ?
(1) x + y < 0
(2) y < x < w
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.
(1)中可以让题干与(1)相减,但由于两条公式的右边都是小于零,所以不能得出w - y > 0。不成立。
(2)如果w大于x,则当w负数,x也是负数;w正数,x负数,且绝对值比w大。所以y一定是负数。当w为正数,w - y > 0;当w为负数,因为x的绝对值比w大,那y的绝对值肯定比x大,比w大,所以w - y > 0成立。
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