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题库 / GMATAdvanced-DS-48
In the figure above, points A, B, C, and D are collinear and AB, BC, and CD are semicircles with diameters d1cm, d2cm, and d3cm, respectively. What is the sum of the lengths of AB,BC and CD in centimeters?
(1)d1:d2:d3 is 3:2:1
(2)The length of AD is 48 cm.
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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题干说的是求AB+BC+CD的长度和 条件2直接给出AD的长度 AD=AB+BC+CD 简单题出错不应该 一定要时刻留意陷阱
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