In the figure, points A, B, C, D, and E lieon a line. A is on both circles, B isthe center of the smaller circle, C is the center of the larger circle, D is onthe smaller circle, and E is on the larger circle. What is the area of the region inside thelarger circle and outside the smaller circle? (1) AB =3 and BC =2 (2) CD =1and DE = 4
A. Statement (1) ALONE issufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE issufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHERare sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE issufficient. E. Statements (1) and (2) TOGETHERare NOT sufficient. Answer: 为什么不选D呢,答案是A,我觉得2也可以吧 |