题目

 While ____ real world is always better and more interesting than ____ model in a park, theme parks can show us what ___ world looks like. A. the, the, the     B. the, a, the     C. /, the, /       D. a, /, a 答案：A下列说法：(1)长度相等的弧是等弧，(2)相等的圆心角所对的弧相等，(3)劣弧一定比优弧短，(4)直径是圆中最长的弦．其中正确的有(　　)A. 1个 B. 2个 C. 3个 D. 4个