The twins are similar each other. [ ]
A. to
B. about
C. at
D. for
答案：A
As we all know, playing chess is usually one-to-one game.
A．a; a
B．/; an
C．/; a
D．the; a
若每次打开Word程序编辑文档时，计算机都会把文档传送到另一台FTP服务器，那么可以怀疑Word程序被黑客植入( )。
A．病毒
B．特洛伊木马
C．FTP匿名服务
D．陷门
