问题 单项选择题

多媒体通信中不同类型的数据对于通信网络的性能和服务有不同的要求。未压缩语音 数据的传输要求通信带宽一般要达到______。

A.8kbps

B.16kbps

C.64kbps

D.256kbps

答案

参考答案:C

解析:多媒体通信包含有对多种类型媒体数据的处理和传输。不同类型的数据对于通信网络的性能和服务 有不同的要求,例如语音数据传输对实时性要求较强,而它对通信带宽的要求则不是很高,64kbps 的传输 速率可完全满足要求。

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根据表格内容,选择正确答案。
Name
Age
Name
Age
Alice
35
Maria
26
    I like shopping, but shopping with young
children is not an easy thing, I have to look
after them when I go shopping with my
husband only when I buy something for him,
When I look at a cheap dress, he always says,
"It's beautiful on you," But when I have an
expensive one in my hands, he always says,
"I don't think it fits you well," So I often go
shopping with my friends, It's fun. I like
shopping alone, too.
   I like shopping very much, but I never go
shopping at the weekends. There are too many
people in shops. I don't like shopping with
other people, It usually because I never buy
them when I first see them. I always look
around other shops to find the same thing
but cheaper. I'm good at finding cheap things.
I don't like buying food in small shops or street
markets. I think food in supermarket is fresh
and cheap.
1. Both Alice and Maria like shopping             .
[ ]
A. with friends
B. alone
C. at the weekends
D. on weekdays
2. Alice's husband says. "I don't think it fits you well." He means "            ". 
[ ]
A. The dress is not suitable for you
B. It is large on you
C. It is too expensive
D. It is small on you
3. Why does it take Maria much time to buy things?
[ ]
A. Because she doesn't really like shopping
B. Because there are too many people in the shop
C. Because she wants to find the same thing cheaper
D. Because she like buying expensive things
4. We can learn from Maria's words that              .
[ ]
A. many people like shopping at the weekends
B. things are cheaper at the weekends
C. people don't like shopping at the weekends
D. she sometimes goes shopping at the weekends
5. Maria likes to buy food            
[ ]
A. in small shops
B. in supermarkets
C. in streets
D. in street markets
单项选择题