在1xEV-DO网络中,PDSN负责()与AT之间的PPP连接。A.建立 B.维持

题型:单项选择题

问题:

在1xEV-DO网络中,PDSN负责()与AT之间的PPP连接。

A.建立

B.维持

C.释放

D.上述均正确

考点:通信工程师C网电信认证C网电信认证题库
题型:单项选择题

阅读回答。

     Two magazines recently listed The Best Cities to Live in. Here is one of them.

     HONG KONG, CHINA.

     Why live in Hong Kong? Here are two reasons.

     The city: This lively city - once a small fishing village - is today an international business centre. It is

an interesting mix of East and West, old and new. Modern skycrapers are next to small temples. Popular

nightclubs are close to traditional teahouses. Busy crowds fill the strees at all hours of the day. But outside

the city, there are parks for walking and relaxing.

    The food: Hong Kong is famous for its wonderful native dishes (try the dim sum). There's also food

from Eruope, North America, and other parts of Asia.

     Minuses: This small city has a large population. How many people live in Hong Kong? Almost seven

million! That's why housing is often very expensive. Traffic and air pollution are also a problem.

1. What used Hong Kong to be?

    __________________________________________________

2. What East and old things can travellers see inside the city?

    __________________________________________________

3. Hong Kong food is another example to show the mix of East and West, isn't it?

    __________________________________________________

4. Why is housing very expensive in Hong Kong?

    __________________________________________________

5. How are the traffic and air in Hong Kong?

    __________________________________________________

题型:单项选择题

下述表现说明食管癌已外侵,除了

A.继发性左侧胸水

B.持续性胸背疼

C.大量呕血

D.吞咽阻挡感

E.食管气管瘘

题型:单项选择题

Nanjing isn't so large_____Shanghai,however,it's the second_____city in East   China.[ ]

A. like; largest

B. as; largest

C. like;large

D. as;large

题型:单项选择题

计算机综合布线过程中,铺设金属管应尽量减少弯头,按照规定,每根金属管的弯头应不超过(),如果在金属管中需要串接3条电缆,电缆测量总长度为1600米,则至少需要订货的电缆长度为()。

如果在金属管中需要串接3条电缆,电缆测量总长度为1600米,则至少需要订货的电缆长度为()。

A.1600米

B.1778米

C.1800米

D.1760米

题型:单项选择题

锅炉水处理工作的具体工作任务是什么?

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