题目内容

The following statements about 4G LTE are correct except ( ).

A. It's based on GSM/EDGE and UMTS/HSPA network technologies.
B. It provides peak download rates of 300 gigabits per second.
C. It provides peak upload rates of 75 megabits per second.
D. It is another version of 4G.

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Which one is the carrier that have not mentioned in this article ( )?

A. Verizon,
B. T-Mobile and
C. AT&T
D. Sprint

What is the speeds of 5G ( )?

A. 1Kbps to 100Kbps
B. 1Mbps to 100Mbps
C. 10Mbps to 100Mbps
D. 1000Mbps to 10Gbps

The following things can be appeared in 5G period except ( ).

Artificial Intelligence
B. Internet of Things
C. Wireless Base Station
D. Internet of Vehicles

楼宇对讲系统的核心部分由_____、_、________组成，此三部分由层间适配器和联网切换器进行衔接。