—People now can know what is happening in the world quickly.

—You’re right.With the help of computers，news can ___every corner of the world.

A．get

B．reach

C．return

D．arrive

Windows中磁盘管理操作包括（）。

A.磁盘空间管理

B.磁盘格式化

C.磁盘碎片整理

D.磁盘扫描

E.以上均是