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【简答题】
阅读理解。 Department stores in the United States are very large.They are called department stores because they have many different departments. For example, you can buy dresses, blouses and skirts in the Women's Clothing Department. You can buy suits, shirts and ties in the Men's Clothing Department. Parents can buy clothing for their children in the Children's Clothing Department. And shoes, boots and sneakers are in the Shoe Department. Most department stores have TVs and radios in their Home Entertainment Departments. Some stores also have Appliance (器具) Departments. You can buy refrigerators, stoves, dishwashers, and other appliances there. Do you want to read a book? Go to the Book Department! Do you want to buy a pair of earrings or a necklace? Go to the Jewelry Department! There are a lot of other reasons why people shop in department stores. You can buy things at special low prices when department stores have sales. Sometimes stores even have half price sales! You can also return things at department stores. Take your receipt to the Customer Service Department, and you can exchange the item (产品) or get back the money. In some stores, you can even eat lunch or dinner in a restaurant, Department stores are great places to shop because people can get almost everything they want in one place. 阅读短文,判断正(T)误(F)。 (     )1. You can buy sneakers either in the Women's Clothing Department or in the Men's Clothing Department. (     )2. Most department stores sell television sets. (     )3. If you want to buy an air-conditioner, you should go to the Jewelry Department. (     )4. You can save money when the store has a sale. (     )5. If you want to return something, you can have a meal.
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参考答案:
举一反三
【多选题】SIP协议包括:()。
A.
SIP
B.
SIP-U
C.
SIP-D
D.
SIP-T
【多选题】以下关于SIP协议描述正确的是()。
A.
SIP协议可以通过MCU(MultipointControlUnit),单播联网方式、或组播方式创建多方会话,支持TDM网络和因特网电话之间的网关功能
B.
SIP协议可以与其他用于建立呼叫的信令系统或协议结合使用,它在设计上充分考虑了对其他协议的可扩展性
C.
SIP协议支持的主叫可以识别出H.323协议支持的被叫,通过H.245网关利用H.225.0协议向被叫发起并建立呼叫
D.
一个SIP主叫可以识别出PSTN上的被叫及其电话号码,通过与PSTN相连的网关向被叫发起并建立呼叫
【单选题】使用IMS网语音业务,终端必须支持SIP协议,若终端不支持SIP协议,则必须通过IMS接入设备接入IMS网。( )
A.
B.
【多选题】以下SIP协议说法正确的是:()。
A.
SIP协议不提供发言控制(floorcontrol)
B.
SIP协议不提供投票等会议控制
C.
SIP协议不具备资源预留功能
D.
SIP协议不支持呼叫重定向-呼叫转移
【判断题】SIP是对等协议,H.248是非对等协议。
A.
正确
B.
错误
【单选题】软交换机(SS)与中继网关(TG)之间的接口协议为( )。
A.
SIGTRAB协议
B.
H.248或MGCP协议
C.
SIP-T或SIP-I协议
D.
MAP协议
【简答题】船体横骨架式结构特点是
【单选题】船体横骨架式结构特点是
A.
纵向构件排列密而大,横向构件排列疏而大
B.
纵向构件排列疏而大,横向构件排列密而小
C.
纵向构件排列密而小,横向构件排列疏而大
D.
纵向构件排列密而小,横向构件排列密而大
【单选题】H.248协议又称()协议。
A.
MGCP
B.
RTP
C.
Megaco
D.
SIP
【多选题】以下关于SIP协议描述正确的是 ( )。
A.
SIP协议是在IP网络上进行多媒体通信的应用层控制协议
B.
SIP协议可用于建立、修改、终结多媒体会话和呼叫
C.
SIP协议采用基于文本格式的客户—服务器方式
D.
SIP协议采用自己的应用层可靠性机制来保证消息的可靠传送
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