谢谢啦谢谢啦

LeannaChina · 发表于 2011-2-17 09:07:10

Q2:

D

··
BC

AE

In the figure, points A, B, C, D, and E lie on a line.A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle.What is the area of the region inside the larger circle and outside the smaller circle?
(1)AB = 3 and BC =2
(2)CD =1 and DE = 4

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.
Answer:
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上面那个大球我粘不好~~就是 GWD 11的第2题数学我认为是E呀答案是A 困惑呢谢谢各位大侠啦
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djforevermore · 发表于 2011-2-20 21:27:19

我也认为是A呢

djforevermore · 发表于 2011-2-20 21:29:47

好吧，我错了，选D，大圆的直径可求，减去DE是小圆的直径

LeannaChina · 发表于 2011-2-20 22:37:57

嗯嗯嗯对的我也认为是D 可是好多套的答案都是A呢答案错了是吧~~

谢谢啦谢谢啦

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