钢丝绳子卡头之间的距离为钢丝绳直径的（）倍。
A.8
B.10
C.12
参考答案：A
When I heard the news that my young brother was admitted into the famous university, I felt ________of him.
A．proud
B．proudly
C．pride
D．pridely
下列数据结构中，能够按照“先进后出”原则存取数据的是
A．循环队列
B．栈
C．队列
D．二叉树
