Traditional Internet access methods like dial-up were so slow that host computers were connected to the dial-up (1) at the customer premise over slow (2) ports. PPP was designed to run directly over these serial links. But with the advent of broadband Internet (3) technologies such as ADSL and cable modems there has been a considerable increase in the bandwidth delivered to the end users. This means that the host computers at the customer premise connect to the (4) or cable "modem" over a much faster medium such as Ethernet. It also means that multiple (5) can connect to the Internet through the same connection.

（2）处应填入（）

A．parallel

B．digital

C．serial

D．variable

要使一张图片显示在所有幻灯片上，您需将它添加到何处？（）

A.您希望该图片在其上的幻灯片中。

B.幻灯片母版上。

C.所有版式。