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提问人:网友breezy999 发布时间:2022-01-07
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【With the 4G telecommunications systems now starting to be deployed,people are looking tow

ards the development of 5th generation or 5G technology services.Although the deployment of any wireless or cellular system take years,development of the 5G technology systems is being investigated.The new 5G technologies will need to be chosen developed and perfected to enable timely and reliable deployment. The new 5th generation,5G technology for cellular systems will probably start to come to fruition around 2020. The current status of the 5G technology for cellular systems is very much in the early development stages.Many companies are looking into the technologies that could be used to become part of the system.In addition to this,a number of universities have set up 5G research units focused on developing the technologies for 5G. In addition, the standards bodies,particularly 3GPP are aware of the development but are not actively planing the 5G systems yet.Many of the technologies to be used for 5G will start to appear in the systems used for 4G and then as the new 5G cellular system starts to formulate in a more concrete manner,they will be incorporated into the new 5G cellular system. The major issue with 5G technology is that there is such an enormously wide variation in the requirements:super fast downloads to small data requirements for IoT than any one system will not be able to meet these needs.Accordingly a layer approach is likely to be adopted.As one commentator stated:5G is not just a mobile technology.It is ubiquitous access to high & low data rate services.】 Based on the paragraph above,at present,5G technology for cellular systems (), many of the technologies to be used for 5G () in the systems used for 4G,the major issue facing with 5G technology is ().

A.has matured B.has setup its standards C.is very much in the early development stages D.is in use A.is being developed B.already appeared C.will not appear D.will start to appear A.super fast downloads B.small data requirements for IoT C.4G system has already satisfied these needs D.an enormously wide variation in the requirements

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第1题

I looked out and found the ground ______ with white snow.          

[    ]

A. covered    

B. covering    

C. to cover    

D. is covered

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第2题
阅读理解,选择合适的答案。????Winter is very cold. S...

阅读理解,选择合适的答案。
    Winter is very cold. Sometimes it snows in winter. We can play with the snow. We can make snowmen.

We usually wear warm clothes. My favourite season is winter, because my birthday is in December.

1. Winter is ______.
A. cold    

B. warm    

C. hot

2. Sometimes it ______ in winter.
A. rains    

B. snows    

C. snow

3. What can we do in winter?  
A. We can swim.

B. We can make snowmen.

C. We can plant trees and flowers.

4. We usually wear _______ in winter.
A. shirts    

B. shorts    

C. warm clothes

5. Which one below is right?
A. I don't like winter.

B. I like to swim in winter.

C. My birthday is in December.

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第3题

He goes hunting in the mountains ____ with snow and ice all day.

[    ]

A. covering

B. covers

C. covered

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第4题
Sherpas of Nepal are renowned in the international climbing and mountaineering community for ______.

A、their faith

B、their hardiness

C、their expertise

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第5题
阅读理解????The two things-snow and mountains-whic...

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    The two things-snow and mountains-which are needed for a ski area are the two things that cause

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   It was the threat of the avalanche and its record as a killer of man in the western mountains that created

the snow ranger. He first started on avalanche control work in the winter of 193738 at Alta, Utah, in

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    It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition.

He must be a good skier and a skilled mountain climber. He should have at least a high school education,

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waist deep in powder testing snow stability, or talks with the ski area's operator as he goes about his

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A. the Forest Service  

B. the Resource Bureau

C. the Tourist Board  

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3. A snow ranger uses very powerful guns________.

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B. to signal for help in an emergency

C. to create an avalanche

D. to communicate with the ski area's operator

4. The primary duty of the snow ranger is ________.

A. to make sure ski area's operators are following safety rules

B. to predict and control avalanches in mountainous areas

C. to check skis and repair them

D. to forecast the weather

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