1. Analog and Digital Signal

随堂测验1

1、单选题:
‍Which is the analog signal?‏
选项:
A:

B:
C:  
D:  
答案: 【 

随堂测验2

1、单选题:
‍Which is the digita signal?‎
选项:
A:
B:
C:  
D:  
答案: 【 

11 Bluetooth

随堂测验1

1、单选题:
  Which did not develop bluetooth technology?‌‏‌
选项:
A: Ericsson
B: Apple
C: Toshiba
D: Nokia
答案: 【 Apple

随堂测验2

1、单选题:
‎What is the operating distance of bluetooth technology?‎
选项:
A: 10m
B: 50m
C: 100m
D: 1000m
答案: 【 10m

随堂测验3

1、判断题:
‌Bluetooth technology is free for all the people‏
选项:
A: 正确
B: 错误
答案: 【 正确

12 Wireless LAN

随堂测验1

1、单选题:
‌In which structure can users communicate directly (   )In which structure can users communicate directly (   )‍‌‍‌‍
选项:
A: centerless structure   
B: central structure
C:  
D:  
答案: 【 centerless structure   

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