400-1816-180
本題由chris提供
A circular tub has a band painted around its circumference, as shown above. What is the surface
area of this painted band?
(1) x = 0.5
(2) The height of the tub is 1 meter.
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
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答案：
E
如圖所示
要求表面積為多少，需要知道桶的周長為多少，x為多少
條件一只告訴了x，不充分；條件二告訴了桶高1米，無關(guān)條件，不充分。
聯(lián)立，同樣無法求出桶的周長，所以也就求不出表面積，因此選E
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