Which one of these statements about connecting to the Internet is true______

A．The Internet can only be used to link computers with same operating system

B．The Internet can be used to connect computers with different ISP

C．You must have a modem to connect to the Internet

D．You must have a telephone line to connect to the Internet

体现医患之间技术性关系的是(　　)

A．医生主动型

B．医患互动型

C．患者被动型

D．指导合作型

E．医生被动型