--- Can I smoke here?

--- Sorry. On no condition_____ in the library.

A．smoking permits;

B．smoking is permitted

C．does smoking permit

D．is smoking permitted

IE浏览器将因特网世界划分为因特网、本地Intranet区域、可信站点区域和受限站点区域的主要目的是

A．保护自己的计算机

B．验证Web站点

C．避免他人假冒自己的身份

D．避免第三方偷看传输的信息