在WindowsXP的资源管理器中，对打开的磁盘无法格式化。
参考答案：对
She had never been to the great Wall before. Today she saw it ________ the
first time.[ ]
A. at
B. for
C. in
D. by
收益级差越大，过渡期越短，投资者从债券互换中获得的收益率就越高。（）
