数据结构分为逻辑结构和存储结构，循环队列属于______结构。
参考答案：存储结构
如果圆锥的底面周长是20π，侧面展开后所得的扇形的圆心角为120°．则圆锥的母线是________。
A common terminology for World Wide Web is simply“The Web”. The Web is an idea that grew out of other Internet resources but is often used incorrectly as a metaphor for the Internet.
