Range
At present，there are five network firms---China Tele，China Uni，Jitong Communications，China Net and China Mobile---that are allowed to operate IP services in China．Each pany has its advantages in service.
Charge
As the Ministry of Information Industry co-ordinates，the charges of IP calls of the five panies are the same，0.30 yuan per minute for DDD calls．4．80 yuan per minute for IDD calls，2.50 yuan for calls from the mainland to Hong Kong，Macao，and Taiwan，and 1.50 yuan from Shenzhen to HK，Zhongshan and Zhuhai to Macao．IP callers don’t enjoy discounts on holidays．
China Tele has the widest coverage．All cities in China with telephone access and most countries in the world are open to China Tele’s IP card．
China Uni’s IP card can reach 29 cities nationwide and more than 130 countries and regions worldwide．Jitong IP can access(接通)12 cities in China and over 70 countries and regions worldwide．
China Net’s IP card can reach 14 cities in China and 149 countries and regions in the world.
China Mobile’s IP card is open to only six cities nationwide but can access more than 200 countries and regions worldwide.
Voice quality
China Tele realizes its IP service by the public Intermet,therefore net congestion(拥挤)and voice delay may sometimes disturb conversations.The other four panies have their private data networks，which help to increase transmission speeds and improve voice quality.
Other services
China Tele，Jitong and China Mobile offer account transfer services．Users can transfer the remaining sum of money on one card to another card.
Jitong and Net Link their services with bank cards．One can enjoy IP’s service without an IP card．Bank card users can make IP phone calls with their bank card numbers，so they needn’t buy new IP cards and remember the new numbers again and again．
As for customer service，China Tele，China Uni and China Mobile provide free hot line service，while Jitong and Net charge for their services.
【小题1】Which of the following is mentioned in the passage? A．China Uni charges IDD calls more than the other four firms．B．China Mobile’s coverage is the least of the five firms．C．China Tele accesses many more cities nationwide than the other four．D．China Net is the only one to be allowed to operate IP service．【小题2】If we want to access more foreign countries and regions with better voice quality，we’d better choose IP card．A．China Uni’sB．China Net’sC．China Mobile’sD．China Tele’s【小题3】When enjoying IP service， .A．Jitong users needn’t buy IP cardsB．China Tele users needn’t buy new IP cardsC．Net users have to link with a bankD．China Mobile users have to pay for their hot line service【小题4】The passage mainly talks about .A．differences between the five IP fimsB．foundation of China’s five IP firmsC．development of China’s five IP firmsD．organization of the five IP firmsC
网友回答
(答案→)C
解析：
【小题1】根据文章Range条目中第一句可知，中国电信覆盖区域最广。
【小题1】根据文章Range和Voice quality两个条目可知，中国移动的IP卡可接通200多个国家和地区。
【小题1】根据Other Service条目第二段可知。
【小题1】通读全文可以看出，本文主要是就五家IP公司从收费、区域、音质和其他服务几方面进行了对比。