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题库 / Prep2007E2-DS-64
If a < y < z < b, is |y - a| < |y - b| ?
(1) |z - a| < |z - b|
(2) |y - a| < |z - b|
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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感觉是不是不用那两个条件，单靠 a < y < z < b，题目问的不等式就能成立了？
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