In enterprises, the gateway is the computer that (67) the traffic from a workstation to the outside network that is serving the Web pages. In homes, the gateway is the (68) that connects the user to the internet.

A．TCP

B．ISP

C．FTP

D．IIS

关于慢性喉炎的病因，正确的是（）

A.鼻-鼻窦炎、慢性扁桃体炎、慢性咽炎等邻近部位炎症直接向喉部蔓延或脓性分泌物的刺激

B.鼻腔阻塞，经口呼吸，使咽喉黏膜血管扩张、喉肌紧张疲劳产生炎症

C.有害气体及烟、酒、灰尘等长期刺激

D.胃-食管-咽反流及幽门螺杆菌感染是成人喉炎的重要原因

E.用嗓过多或发声不当